1urn:lsid:arphahub.com:pub:F9B2E808-C883-5F47-B276-6D62129E4FF4urn:lsid:zoobank.org:pub:245B00E9-BFE5-4B4F-B76E-15C30BA74C02Biodiversity Data JournalBDJ1314-28361314-2828Pensoft Publishers10.3897/BDJ.8.e505435054313282Taxonomic PaperLepidopteraBiodiversity & ConservationCameroonAfricaFirst records of 31 species of butterflies and moths (Lepidoptera) in Cameroon, with remarks on their elevational rangesDelabyeSylvainsylvain.delabye@gmail.comhttps://orcid.org/0000-0003-0911-972112MaicherVincent13SáfiánSzabolcs24PotockýPavel1MertensJan E.J.https://orcid.org/0000-0002-0025-703953PrzybyłowiczŁukasz6MurkweMercy7KobeIshmeal N.3FokamEric B.7JanečekŠtěpán3TropekRobertrobert.tropek@gmail.comhttps://orcid.org/0000-0001-7499-625913Biology Centre, Czech Academy of Science, Institute of Entomology, Branisovska 31, CZ-37005 Ceske Budejovice, Czech RepublicBiology Centre, Czech Academy of Science, Institute of EntomologyBranisovska 31, CZ-37005 Ceske BudejoviceCzech RepublicFaculty of Science, University of South Bohemia, Branisovska 1760, CZ-37005 Ceske Budejovice, Czech RepublicFaculty of Science, University of South BohemiaBranisovska 1760, CZ-37005 Ceske BudejoviceCzech RepublicDepartment of Ecology, Faculty of Science, Charles University, Vinicna 7, CZ-12844 Prague, Czech RepublicDepartment of Ecology, Faculty of Science, Charles UniversityVinicna 7, CZ-12844 PragueCzech RepublicInstitute of Silviculture and Forest Protection, Faculty of Forestry, University of West Hungary, Bajcsy-Zsilinszky utca 4, H-9400 Sopron, HungaryInstitute of Silviculture and Forest Protection, Faculty of Forestry, University of West HungaryBajcsy-Zsilinszky utca 4, H-9400 SopronHungaryBiodiversity Inventory for Conservation NPO (BINCO), Walmersumstraat 44, 3380 Glabbeek, BelgiumBiodiversity Inventory for Conservation NPO (BINCO)Walmersumstraat 44, 3380 GlabbeekBelgiumInstitute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, PL-31-016 Krakow, PolandInstitute of Systematics and Evolution of Animals, Polish Academy of SciencesSławkowska 17, PL-31-016 KrakowPolandDepartment of Zoology and Animal Physiology, Faculty of Science, University of Buea, P.O. Box 63, Buea, CameroonDepartment of Zoology and Animal Physiology, Faculty of Science, University of BueaP.O. Box 63, BueaCameroon
Corresponding authors: Sylvain Delabye (sylvain.delabye@gmail.com), Robert Tropek (robert.tropek@gmail.com).
Academic editor: Martin Wiemers
2020050320208e50543C3175E5B-EA10-5427-839E-EABB740C301B37085422801202019022020Sylvain Delabye, Vincent Maicher, Szabolcs Sáfián, Pavel Potocký, Jan E.J. Mertens, Łukasz Przybyłowicz, Mercy Murkwe, Ishmeal N. Kobe, Eric B. Fokam, Štěpán Janeček, Robert TropekThis is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Background
The biodiversity of West and Central Africa is understudied, including butterflies and moths (Lepidoptera). Cameroon, through its position in between few biogeographic regions and diversity of habitats, is an important hotspot of lepidopteran diversity. However, the country also ranks low when it comes to local biodiversity knowledge. During our long-term ecological projects in the Cameroonian part of the Gulf of Guinea Highlands, we collected rich material of butterflies and moths, including a number of interesting faunistic records.
New information
In this study, we report 31 species of butterflies and moths which have not yet been recorded in Cameroon. These species comprised eight new genera records for the country. In many cases, our records represented an important extension of the species’ known distribution, including ten species whose distribution ranges extended into the Guinean biogeographic region. We also comment on the species’ elevational distribution ranges on Mount Cameroon where most of our records originated. Additionally, we confirm the presence of a butterfly Telchiniaencedena, after more than a century since its first and so far its only record in Cameroon.
West and Central Sub-Saharan Africa belong to the areas with the lowest knowledge on regional biodiversity on the continent. Although almost 3,000 taxa of moths (De Prins and De Prins 2019) and almost 1,600 taxa of butterflies (Williams 2018) have been reported from Cameroon so far, much higher diversity of these groups can be expected, considering the country’s high habitat heterogeneity. The Gulf of Guinea Highlands is an important montane range on the borders of Nigeria and Cameroon (i.e. at the edge of the Guinean and Congolian biogeographic regions). It represents the only large montane area in the region and is recognised as a biodiversity hotspot with high endemism for numerous taxa (Myers et al. 2000), including butterflies and moths (Larsen 2005, Ustjuzhanin et al. 2018). However, the biodiversity of this montane range is still relatively unexplored and comprehensive studies of Lepidoptera are still under-represented.
Several recent ecological studies on lepidopteran communities in the Gulf of Guinea Highlands (e.g. Tropek and Konvička 2010, Maicher et al. 2018, Maicher et al. 2020) collected an extensive number of butterflies and moths, including several newly described species (e.g. Yakovlev and Sáfián 2016, Ustjuzhanin et al. 2018, Sáfián and Tropek 2016, Sáfián et al. 2019), as well as new country records already published during earlier stages of the projects (e.g. Tropek et al. 2013, Tropek et al. 2015, Maicher et al. 2016, Ustjuzhanin et al. 2018, Przybyłowicz et al. 2019b). The large amount of collected material still holds new species of general faunistic or taxonomic interest. In this study, we report 31 species of butterflies and moths recorded in Cameroon for the first time. In some cases, these records significantly extended the species’ known geographical ranges. These are supplemented by a rediscovery of a butterfly species in Cameroon after more than a century.
Materials and methods
All reported butterfly and moth specimens were collected between 2008 and 2017 in Cameroon (Fig. 1).
Nine sampled localities lie in the Mount Cameroon region, Fako Division, Southwest Region, Cameroon. Seven of these localities are on the south-western slope of Mount Cameroon inside the Mount Cameroon National Park, in tropical rainforests at different elevations. These represent mosaics of primary and secondary lowland forests (Bamboo Camp, 350 m a.s.l.; Drink Gari camp, 650 m a.s.l.), through upland (PlanteCam camp, 1,100 m a.s.l.) and submontane (Crater Lake camp, 1,450 m a.s.l.) forests locally disturbed by elephants, to montane forests (Elephant Camp, 1,850 m a.s.l.; Mapanja camp, 1,850 m a.s.l.; Mann’s Spring, 2,200 m a.s.l.) (Fig. 2b, c, d, e). The two remaining localities in the Mount Cameroon region are situated in a coastal forest (Fig. 2a) of the Bimbia-Bonadikombo Community Forest (Dikolo Peninsula camp, 30 m a.s.l.; Ferenc et al. 2018) and in a heavily disturbed lowland forest on a lower hill with a cell tower close to the Chop Farm junction, Bimbia village (Radio Hill, 220 m a.s.l.).
The other two localities are situated in the Bamenda Highlands, Northwest Region, Cameroon. Mendong Buo, ca. 5 km south-east of Big Babanki, represents a mosaic of montane forest remnants, forest clearings dominated by Pteridiumaquilinum, submontane grasslands maintained by cattle grazing and species‐rich scrub vegetation along streams (Tropek and Konvička 2010; Fig. 2f). Lake Oku represents a primary montane forest along the crater lake shore, on the southern slopes of Mount Oku.
The last three localities are in disturbed lowland forests across the country. Mundemba represents heavily disturbed secondary regrowth south of Mundemba, close to the Korup NP, Southwest Region. Ebogo is a disturbed lowland rainforest in the Ebogo Ecotouristic Site, ca. 80 km south of Yaounde, Centre Region. Lastly, close to Ebodje, South Region, butterflies were recorded in a secondary lowland forest.
All moths were attracted to light (see Maicher et al. 2020 for the detailed protocol). Butterflies were collected by traps baited with fermented mashed bananas (Euphaedratemeraria, see Maicher et al. 2020 for details) or by a butterfly net (all other butterfly species).
Nomenclature and distribution of the reported species were based on the AfroMoths online database (De Prins and De Prins 2019) for moths and on Williams (2018) for butterflies. The biogeographic regions nomenclature follows Linder et al. (2012). The voucher material is deposited in the Nature Education Centre of the Jagiellonian University in Kraków, Poland and in the Biology Centre, Czech Academy of Sciences, České Budějovice, Czechia.
A.holobrunnea was previously reported from Ghana and Guinea only (Przybyłowicz and Bąkowski 2011) and, therefore, it was considered as an endemic to the western part of the Guinean subregion. Our record has enlarged its known range to over 1,000 km to the east. It has also evidenced the species’ presence in the eastern part of the Guinean region. In the Mount Cameroon region, the single individual was collected in the lowest locality (30 m a.s.l.) (Fig. 3).
Type status:Other material. Occurrence: individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Anapisametarctioides (Hampson, 1907); Location: continent: Africa; country: Cameroon; stateProvince: Southwest Region; locality: Mann’s Spring, Mount Cameroon; verbatimElevation: 2,200 m; decimalLatitude: 04.1428; decimalLongitude: 09.1225; Identification: identifiedBy: Łukasz Przybyłowicz; dateIdentified: 2017; Event: samplingProtocol: Light catching; eventDate: 09/11/2016; habitat: Montane forest close to the timberline; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Distribution
This species was known from Kenya, Uganda, Rwanda and the Democratic Republic of Congo. Our record on Mount Cameroon has extended its western distribution and has evidenced the species from the Guinean biogeographic region. On Mount Cameroon, it is restricted to above 1,100 m a.s.l. (Fig. 4).
This species was known from Ghana, Nigeria and Equatorial Guinea. Hence, its distribution in Cameroon was thus expected, although never reported before. The only specimen was caught in montane forest (1,850 m a.s.l.) (Fig. 5).
This species was previously known from the Congolian and Shaba biogeographic regions (Przybyłowicz 2013). Our record extended its distribution to the Guinean biogeographic region. We collected it only in submontane and montane forests (1,450 and 1,850 m a.s.l.) (Fig. 6).
This species was recently described from Gabon and considered as endemic to the country. Our record extended its known distribution to Cameroon, as well as to the Guinean biogeographic region. On Mount Cameroon, our records came from lowland forests only (350 and 650 m a.s.l.) (Fig. 7).
Notes
The species was originally described as Balacra (Daphaenisca) inexpectata Durante & Zangrilli, 2016. The subgenus was formally raised to genus in Przybyłowicz et al. (2019a), based on the molecular and morphological evidence. In De Prins and De Prins (2019), the junior synonym has still been listed.
This species was known from Ghana and Democratic Republic of Congo (Przybyłowicz and Bąkowski 2011). Our record confirmed its probable occurrence across the Afrotropical rainforest zone by partially filling the distributional gap. On Mount Cameroon, it was recorded from lowland to submontane forests (650 and 1,450 m a.s.l.) (Fig. 8).
Type status:Other material. Occurrence: individualCount: 9; sex: females; lifeStage: adult; Taxon: scientificName: Ligulosiacostimaculata (Aurivillius, 1910); Location: continent: Africa; country: Cameroon; stateProvince: Southwest Region; locality: Mann’s Spring, Mount Cameroon; verbatimElevation: 2,200 m; decimalLatitude: 04.1428; decimalLongitude: 09.1225; Identification: identifiedBy: Łukasz Przybyłowicz; dateIdentified: 2017; Event: samplingProtocol: Light catching; eventDate: 08/11/2016; habitat: Montane forest close to the timberline; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Type status:Other material. Occurrence: individualCount: 46; sex: females; lifeStage: adult; Taxon: scientificName: Ligulosiacostimaculata (Aurivillius, 1910); Location: continent: Africa; country: Cameroon; stateProvince: Southwest Region; locality: Mann’s Spring, Mount Cameroon; verbatimElevation: 2,200 m; decimalLatitude: 04.1428; decimalLongitude: 09.1225; Identification: identifiedBy: Łukasz Przybyłowicz; dateIdentified: 2017; Event: samplingProtocol: Light catching; eventDate: 01/02/2017; habitat: Montane forest close to the timberline; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Type status:Other material. Occurrence: individualCount: 64; sex: females; lifeStage: adult; Taxon: scientificName: Ligulosiacostimaculata (Aurivillius, 1910); Location: continent: Africa; country: Cameroon; stateProvince: Southwest Region; locality: Mann’s Spring, Mount Cameroon; verbatimElevation: 2,200 m; decimalLatitude: 04.1428; decimalLongitude: 09.1225; Identification: identifiedBy: Łukasz Przybyłowicz; dateIdentified: 2017; Event: samplingProtocol: Light catching; eventDate: 18/04/2017; habitat: Montane forest close to the timberline; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Distribution
This species was reported from montane regions of Central (Democratic Republic of Congo) and Eastern (Kenya and Tanzania) Africa. Our record thus extended its known range to the Guinean biogeographic region. It was also the first record of Ligulosia genus in Cameroon. On Mount Cameroon, it has a relatively broad elevational distribution range (650–2,200 m a.s.l.), although most specimens were recorded at the higher elevations (Fig. 9).
P.spurrelli was reported only from Ghana and Kenya. Such scattered known distribution implies poor knowledge of the distributional range of the species. This is also the first record of the Palaeugoa genus in Cameroon. The two records from Mount Cameroon were made in lowland and upland forests (from 350 to 1,100 m a.s.l.) (Fig. 10).
This species was known from Gabon and Ghana only. This is also the first record of the Calligraphidia genus in Cameroon. The only specimen from Mount Cameroon was collected in montane forest (1,850 m a.s.l.) (Fig. 11).
This species was known from Gabon and Sierra Leone only. This record confirmed its broader distribution. This is also the first record of the Uripao genus in Cameroon. On Mount Cameroon, our only record came from the montane forests (1,850 m a.s.l.) (Fig. 12).
D.punctifera was known from several countries across Central and Eastern Africa (but none bordering with Cameroon), but also in Côte d’Ivoire and South Africa. In the Mount Cameroon region, it has a very broad elevational range from 30 m to 1,850 m a.s.l. (Fig. 13).
This species was known from Ghana and Nigeria. Our record broadened its known distribution eastwards. In the Mount Cameroon region, we recorded it in all sampled lowland and upland forests up to 1,100 m a.s.l. (Fig. 14).
This species was considered as endemic to Nigeria; we extended its known distribution eastwards. On Mount Cameroon, it was collected in forests from 350 to 1,100 m a.s.l. (Fig. 15).
This species was previously recorded only in Sierra Leone and Zimbabwe; our record thus partly filled the wide gap in its distribution. It is also the first record of the Orgyia genus in Cameroon. On Mount Cameroon, it was recorded in lowland and upland forests ranges from 350 to 1,100 m a.s.l. (Fig. 16).
This species was known only from Uganda and Central African Republic. Our Cameroonian record thus broadened its distribution range westwards to the Guinean biogeographic region. On Mount Cameroon, it was collected in lowland forests at 350 and 650 m a.s.l. (Fig. 17).
This species was known from the Democratic Republic of Congo, Tanzania and South Africa. Our record in Cameroon is thus the westernmost for the species and extended its distribution to the Guinean biogeographic region. In the Mount Cameroon region, it was recorded in all studied lowland forests up to 650 m a.s.l. (Fig. 18).
The known distribution of this species already included the Guinean (Ghana) and Congolian (Gabon, Central African Republic and Democratic Republic of Congo) biogeographic regions. The only specimen was collected in coastal forest at 30 m a.s.l. (Fig. 19).
This species was reported from Ghana, Nigeria and Gabon. It is also the first record of Hypotrabala genus in Cameroon. In the Mount Cameroon region, it was collected in lowland forests up to 350 m a.s.l. (Fig. 20).
This species was known from the Guinean (Côte d’Ivoire and Nigeria) and Zambezian (Kenya, Tanzania and Uganda) biogeographic regions, with a large distribution gap in the Congolian biogeographic region. On Mount Cameroon, it was recorded in the submontane and montane forests between 1,450 and 1,850 m a.s.l. (Fig. 21).
This species was already known from several countries in the Guinean and Congolian biogeographic regions, including Nigeria, Gabon and Congo bordering Cameroon. On Mount Cameroon, it was recorded in lowland forests at 350 and 650 m a.s.l. (Fig. 22).
This species was known from the Guinean (Côte d’Ivoire) and Congolian (Gabon, Democratic Republic of Congo and Rwanda) biogeographic regions. It is also the first record of the Archinadata genus in Cameroon. On Mount Cameroon, it was recorded in the lowland forests at 350 and 650 m a.s.l. (Fig. 23).
This species was considered endemic to Gabon. Our record in Cameroon extended its distribution range into the Guinean biogeographic region. On Mount Cameroon, it occurred in lowland and upland forests between 350 and 1,100 m a.s.l. (Fig. 24).
Type status:Other material. Occurrence: individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Gargettoscranciaalbolineata (Strand, 1912); Location: continent: Africa; country: Cameroon; stateProvince: Southwest Region; locality: Crater Lake, Mount Cameroon; verbatimElevation: 1,450 m; decimalLatitude: 04.1443; decimalLongitude: 09.0717; Identification: identifiedBy: Vincent Maicher; dateIdentified: 2017; Event: samplingProtocol: Light catching; eventDate: 17/02/2017; habitat: Submontane forest locally disturbed by elephants; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Distribution
This species was known from the Guinean (Ivory Coast) and Congolian (Equatorial Guinea and the Democratic Republic of the Congo) biogeographic regions. It is also the first record of the Gargettoscrania genus in Cameroon. On Mount Cameroon, it was collected in lowland (350 m a.s.l.) to submontane (1,450 m a.s.l.) forests (Fig. 25).
Type status:Other material. Occurrence: individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Pseudobarobatadenticulata Kiriakoff, 1966; Location: continent: Africa; country: Cameroon; stateProvince: Southwest Region; locality: Crater Lake, Mount Cameroon; verbatimElevation: 1,450 m; decimalLatitude: 04.1443; decimalLongitude: 09.0717; Identification: identifiedBy: Vincent Maicher; dateIdentified: 2017; Event: samplingProtocol: Light catching; eventDate: 20/11/2016; habitat: Submontane forest locally disturbed by elephants; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Distribution
This species was known from Gabon, Central African Republic and Tanzania. Our record from Cameroon thus broadened its known distribution westwards, as well as into the Guinean biogeographic region. In the Mount Cameroon region, it was collected in lowland forests (30 and 350 m a.s.l.), although one specimen was recorded in submontane forest (1,450 m a.s.l.) (Fig. 26).
This species was reported from the Congolian biogeographic region only (Central African Republic and Gabon). Our record extended its known distribution to the Guinean biogeographic region. On Mount Cameroon, it was recorded in lowland forests at 350 and 650 m a.s.l. (Fig. 27).
The nominotypical subspecies is relatively common in the Guinean biogeographic zone (most countries along the seashore between Mauritania and Nigeria) and from the Southern African region and Madagascar. Our Cameroonian record thus extended its distribution to the easternmost edge of the Guinean biogeographic zone. In the Mount Cameroon region, it was recorded from coastal (30 m a.s.l.) and submontane forests (1,450 m a.s.l.) (Fig. 28).
Type status:Other material. Occurrence: individualCount: 1; lifeStage: adult; Taxon: scientificName: Mezamabillei (Holland, 1893); Location: continent: Africa; country: Cameroon; stateProvince: Southwest Region; locality: Radio Hill, Bimbia village; verbatimElevation: 220 m; decimalLatitude: 03.9666; decimalLongitude: 09.2411; Identification: identifiedBy: Szabolcs Sáfián | Robert Tropek; dateIdentified: 2015; Event: samplingProtocol: Butterfly net; eventDate: 30/12/2014; habitat: Hilltop with disturbed lowland forest; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Distribution
This species was known to be widely distributed in the Guinean biogeographic region (most countries from Guinea to Nigeria) and in Gabon. In the Mount Cameroon region, it was collected in the two lowest localities (30 and 220 m a.s.l.) (Fig. 29).
A.macaria was known from the western part of the Guinean biogeographic region only (most countries along the seashore between Senegal and Ghana). Our record from Cameroon therefore extended its distribution for over 1,000 km westwards to the easternmost edge of the Guinean biogeographic region. In the Mount Cameroon region, it was collected in the two lowest localities (30 and 220 m a.s.l.).
Type status:Other material. Occurrence: individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Telchiniaencedana (Pierre, 1976); Location: continent: Africa; country: Cameroon; stateProvince: Northwest Region; locality: Mendong Buo, Big Babanki, Bamenda Highlands; verbatimElevation: 2,200 m; decimalLatitude: 06.0921; decimalLongitude: 10.2987; Identification: identifiedBy: Robert Tropek; dateIdentified: 2017; Event: samplingProtocol: Butterfly net; eventDate: 30/11/2016; habitat: Mosaic of mountain forest remnants, forest clearings dominated by Pteridiumaquilinum, submontane grasslands maintained by cattle grazing and species‐rich scrub vegetation along streams; Record Level: type: PhysicalObject; institutionID: http://grbio.org/cool/8t1f-g2z6; institutionCode: ZMJU; basisOfRecord: PreservedSpecimen
Distribution
This relatively widespread species was recorded from numerous countries of the Guinean (from Senegal to Cameroon) and Congolian (Democratic Republic of the Congo) biogeographic regions, but also from the Ethiopian, Somalian, Zambezian and Shaba regions. In Cameroon, its only record was published by Aurivillius (1905) more than a century ago, from the Adamawa Province. Our recent record therefore confirmed its presence in the country and extended the species’ distribution range to the Northwest Province (Fig. 30).
This species was known from Equatorial Guinea and Gabon, both in the Congolian biogeographic region. Our record thus extended its distribution range northwards and evidenced its occurrence in the Guinean biogeographic region. On Mount Cameroon, it was collected mostly in the lowland forests at 350 and 650 m a.s.l.; one specimen was caught also in the upland forest at 1,100 m a.s.l. (Fig. 31).
This species was previously known from the Guinean (from Guinea to Nigeria), Shaba, Zambezian and Sudanian biogeographic regions. Our record in Cameroon partly filled the gap in its known distribution. It was known as a relatively common species in many disturbed lowland forests in the surrounding countries (Larsen 2005), thus its occurrence in Cameroon is not surprising. Three of the four reported specimens were collected in disturbed lowland forests (220 and 660 m a.s.l.), corresponding to the known species’ habitats (Larsen 2005). On the other hand, its occurrence at 2,200 m a.s.l. has evidenced the species as a habitat generalist (Fig. 32).
This species was recorded from West Africa (from Guinea-Bissau to Nigeria) to Central (Democratic Republic of the Congo) and Eastern Africa. Especially because it was already known from the Cross River State in Nigeria (Larsen 2005), its occurrence in Cameroon could be expected. We collected four specimens, each in a different disturbed lowland forest (from 20 to 660 m a.s.l.), therefore the species seems to be widespread, but locally scarce in Cameroon. This fully corresponds with T. Larsen’s experience with this species in Nigeria (Larsen 2005) (Fig. 33).
Discussion
Altogether, the Lepidoptera species included in this study comprise 31 species and 8 genera new for the entomofauna of Cameroon, as well as a butterfly T.encedana that had not been recorded for more than a century in Cameroon. With the records from this study, the known diversity in Cameroon now surpasses 3,000 taxa for moths (species and subspecies combined; De Prins and De Prins 2019), whilst it approximates 1,600 taxa for butterflies (Williams 2018).
Of the 31 species new for Cameroon, four are known from the Guinean biogeographic region only (De Prins and De Prins 2019, Williams 2018). Therefore, our records did not change their endemic status, although this study extended their distribution to the easternmost border of the Guinean region (including an extension of ca. 1,000 km for A.holobrunnea and A.macaria). Another ten of the listed species had been previously recorded in the Congolian region only. From these, our records have extended distribution of Euphaedratemeraria northwards, while the other species’ distributions have been extended eastwards (De Prins and De Prins 2019, Williams 2018). Mainly, we have evidenced these ten species to occur in the Guinean biogeographic region, although only at its edge. This broadening of the easternmost, westernmost or northernmost limits of the numerous species distribution shows the importance of Cameroon (with special emphasis on Mount Cameroon) as the ‘crossroads’ between the Guinean and the Congolian biogeographic regions. It also reinforces Mount Cameroon as a biodiversity hotspot area (Myers et al. 2000, Ustjuzhanin et al. 2018).
Several other species records included in this report are not surprising since they more or less expectedly fill gaps in their known distribution. Most expectedly, we recorded twelve species (such as A.makomensis and S.plagiatus) already known from the countries bordering Cameroon or some other nearby countries in the Guinean and Congolian regions (De Prins and De Prins 2019). Six other species (such as P.spurrelli and M.tripunctata) were known to have a more scattered distribution amongst West, East and South Africa, but in countries more distant from Cameroon, forming a relatively large gap in their known distribution. Aside from the species with azonal distribution (such as the montane species), such large gaps rather imply lack of knowledge on the species occurrence (cf. Maicher et al. 2016). Our records in Cameroon have confirmed such suggestion by the partial filling of these distribution gaps. The record of the widespread T.encedana more than 100 years after its first and only record in Cameroon is also a perfect illustration of this general lack of knowledge on the Cameroonian (and Afrotropical) biodiversity of Lepidoptera. This was already pointed out by Tropek et al. (2013) and Tropek et al. (2015) for butterflies and by Maicher et al. (2016) for moths.
Considering the elevational ranges of the reported species, 19 reported lepidopteran species were exclusively collected in lowland and upland forests (between 30 and 1,100 m a.s.l) on Mount Cameroon, while records of five moth species were restricted to submontane and montane forests (between 1,450 and 2,100 m a.s.l.). Consequently, given that the local lepidopteran diversity is known to be higher at lower elevations (differing amongst the lepidopteran groups but always up to 1,100 m a.s.l.; Maicher et al. 2020), it appears that the knowledge gap seems proportionally comparable between the lower and higher elevations on the mountain. Although knowledge on precise elevational ranges of Afrotropical moths is highly limited, all five high-elevation species were previously reported from countries with montane ranges. These species are also the ones with the known azonal distributions which can be related to their affiliation to (sub)montane habitats rather than the severe lack of knowledge on their actual distribution. The remaining seven species have been recorded in both lowland and montane forests on Mount Cameroon.
In conclusion, our report of numerous butterfly and moth species and genera, previously not known to occur in Cameroon, highlights the relatively poor knowledge on the local and regional diversity of Afrotropical Lepidoptera. Moreover, some of these records represent a substantial extension of the individual species’ known distribution. Altogether, we encourage the collection and publishing of similar faunistic data on lepidopteran occurrence from the Afrotropical countries.
Acknowledgements
We are grateful to Francis E. Luma, Eliška Chmelová, Petra Janečková, Zuzana Musilová, Ernest Vunan Amohlon and numerous other colleagues and field assistants for their help in the field; the Mount Cameroon National Park staff for their support; and Tomasz Pyrcz and his team at the Nature Education Centre, Jagiellonian University, Krakow, Poland, for setting and curating our Lepidoptera material; Karolina Fok and Magdalena Kawałkowska for taking pictures of Daphaeniscainexpectata. Our sampling was permitted by the Ministries of the Republic of Cameroon for Forestry and Wildlife and for Scientific Research and Innovation. Our projects were funded by the Czech Science Foundation (20-16499S), Charles University (PRIMUS/17/SCI/8 and UNCE204069), University of South Bohemia (GAJU030/2016/P and 152/2016/P) and Institute of Entomology, BC CAS (RVO:60077344).
Author contributions
SD, VM, SzS, PP, JEJM, MM, INK, ŠJ and RT collected the materials. SD, VM, SzS, ŁP, MM and RT identified the sampled specimens. JEJM photographed the specimens. SD and RT led the manuscript writing and all co-authors participated in the manuscript writing and approved its submission.
References1905Lieutnant A. Schultzes Sammlung von Lepidopteren aus West-Afrika.212147Afromoths, online database of Afrotropical moth species (Lepidoptera)http://www.afromoths.net/2019-11-17T00:00:00+02:002018Something is missing at the bottom: Importance of coastal rainforests for conservation of trees, birds and butterflies in the Mount Cameroon area56367968310.1111/aje.12506LarsenT. B.2005Apollo BooksStenstrup, Denmark8652012The partitioning of Africa: statistically defined biogeographical regions in sub-Saharan Africa3971189120510.1111/j.1365-2699.2012.02728.x2016Two genera and nineteen species of fruit-feeding erebid moths (Lepidoptera: Erebidae) recorded in Cameroon for the first time1261647010.3157/021.126.01082018Flying between raindrops: Strong seasonal turnover of several Lepidoptera groups in lowland rainforests of Mount Cameroon824127611277210.1002/ece3.47042020Seasonal shifts of biodiversity patterns and species’ elevation ranges of butterflies and moths along a complete rainforest elevational gradient on Mount Cameroon47234235410.1111/jbi.137402000Biodiversity hotspots for conservation priorities4036772853858http://zoobank.org/32BE143C-18E6-43FE-ABBC-CD68EA7A011B10.1038/350025012011Anapisamonotonia Kiriakoff, 1963 – a junior synonym of Anapisaholobrunnea (Talbot, 1932), with new records of Arctiinae (Lepidoptera: Erebidae) from Ghana30311546010.11646/zootaxa.3031.1.52013Review of subgenusCompsochromia Kiriakoff 1953 (Lepidoptera: Erebidae: Arctiinae, genus Balacra) with identification keys and description of a new species from Cameroon491536010.1080/00379271.2013.7634592019Molecular systematics of the arctiine tribe Syntomini (Lepidoptera, Erebidae)44362463710.1111/syen.123432019Amerila (Lepidoptera: Erebidae: Arctiinae) of Cameroon with morphological remarks on male and female genitalia4674228329510.11646/zootaxa.4674.2.82016Two new butterfly species (Lepidoptera: Rhopalocera) from Mount Cameroon, Gulf of Guinea Highlands, Cameroon4150212313210.11646/zootaxa.4150.2.22019Two new species in the genus Andronymus Holland, 1896 (Lepidoptera, Hesperiidae)4624110812010.11646/zootaxa.4624.1.72010Forest eternal? Endemic butterflies of the Bamenda highlands, Cameroon, avoid close-canopy forest48242843710.1111/j.1365-2028.2009.01129.x2013Acraeawigginsioccidentalis (Bethune-Baker, 1926) (Lepidoptera: Nymphalidae), a new butterfly for Nigeria, with remarks on its habitat and known distribution41161163165https://www.redalyc.org/articulo.oa?id=455287550142015First records of Hypolycaenaanara Larsen, 1986 from Cameroon (Lepidoptera: Lycaenidae)43170235239https://www.redalyc.org/articulo.oa?id=455414210082018A newly discovered biodiversity hotspot of many-plumed moths in the Mount Cameroon area: first report on species diversity, with description of nine new species (Lepidoptera, Alucitidae)77711913910.3897/zookeys.777.24729Afrotropical Butterflies. 17th Editionhttp://www.lepsocafrica.org/?p=publications&s=atb/2019-08-25T00:00:00+03:002016Geraldocossus gen. nov. (Lepidoptera, Cossidae) from Mount Cameroon (West Africa)4114559559910.11646/zootaxa.4114.5.8E78AEC54-D874-55EB-B3BD-AA37883E604110.3897/BDJ.8.e50543.figure13708544
Map of Cameroon with the study sites and the Sanaga river considered as a border between the Guinean and Congolian biogeographic regions.