Biodiversity Data Journal :
Taxonomy & Inventories
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Corresponding author: Hongbin Liang (lianghb@ioz.ac.cn)
Academic editor: Stephen Venn
Received: 21 Mar 2022 | Accepted: 20 May 2022 | Published: 30 May 2022
© 2022 Haoyuan Li, Yihang Li, Hongliang Shi, Hongbin Liang
This 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.
Citation:
Li H, Li Y, Shi H, Liang H (2022) The genus Pareuryaptus (Carabidae, Pterostichini) in China, with three new country records. Biodiversity Data Journal 10: e84104. https://doi.org/10.3897/BDJ.10.e84104
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Pareuryaptus is a genus of Carabidae containing 18 species and one subspecies, distributed mainly in the Oriental Region. However, only one species and one subspecies were recorded from China before the present study.
Four species and one subspecies of Pareuryaptus are reported from China with three of them newly recorded: Pareuryaptus adoxus (Tschitschérine) from Yunnan; Pareuryaptus exiguus Dubault, Lassalle & Roux from Guangxi; and Pareuryaptus luangphabangensis Kirschenhofer from Yunnan. Moreover, the male of Pareuryaptus exiguus Dubault, Lassalle & Roux is firstly described and a key to all known Chinese species is provided.
Trigonotomina, Pareuryaptus, key, new record, China
Pareuryaptus is a genus under the subtribe Trigonotomina (Carabidae, Pterostichini).
It is not surprising for us to find some new records of Pareuryaptus in China, because many species are distributed in China's southern neighbouring countries, such as Vietnam, Laos and Myanmar. We obtained a specimen from Xishuangbanna (South Yunnan) in the second half of 2020, which aroused our interest in this genus. After that, to make a more complete study, we collected more specimens and studied the collection of the Institute of Zoology, Chinese Academy of Sciences.
The primary purposes of this paper are to represent three new records of Pareuryaptus species from China, firstly to describe the male of P. exiguus that was originally described by a female holotype and to provide a key for all Chinese Pareuryaptus species.
The specimens examined in the present study are from these collections:
In the citations of species, the following abbreviations of collections were mentioned, but there is no specimen examination from these collections:
Habitus and aedeagus were captured by a Nikon D7200 camera with LAOWA 60 mm F2.8 2:1 Super Macro Lens. Maxillary palpi and pronota were captured by a Nikon D5500 camera with a Nikon SMZ18 stereomicroscope. Stains and dust on specimens were moderately cleared using Photoshop Elements 2022 Editor 20.0 after photographing.
Trigonotoma curtula
Amongst the seven genera (Trigonotoma Dejean, Lesticus Dejean, Euryaptus Bates, Nesites Andrews, Pareuryaptus Dubault, Lassalle & Roux, Leiolesticus Roux, Lassalle & Dubault and Trigonaptus Fedorenko) of Trigonotomina, Pareuryaptus can be distinguished by the following character combinations: first antennomere (scape) longer than the length of the second and third antennomeres combined; antennal pedicel glabrous, without ventral seta; apex of labrum emarginate, with six apical setae, four grouped near the middle, the lateral setae evidently distant from the median four ones; parascutellar striae absent or very short; metacoxa unisetose; females with one seta on each side of sternite VII (
Habitus: Fig.
Habitus of Pareuryaptus spp. from China (scale bars = 3 mm): a, P. adoxus (Tschitschérine), female from Danuoyou, Yunnan; b, P. exiguus Dubault, Lassalle & Roux, male from Naqin Village, Guangxi; c, P. luangphabangensis Kirschenhofer, male from Nanpaxiaozhai, Yunnan; d, P. luangphabangensis Kirschenhofer, male from Jino Mt., Yunnan (taken by Xiaoran Yang); e, P. chalceolus chalceolus (Bates), female from Hanjiang, Fujian; f, P. chalceolus formosanus (Jedlička), female from Jialeshui, Taiwan.
Left lateral view and dorsal view of median lobe of aedeagus of Pareuryaptus spp. from China (scale bar = 2 mm): a & b, P. exiguus Dubault, Lassalle & Roux, Naqin Village, Guangxi; c & d, P. luangphabangensis Kirschenhofer, Nanpaxiaozhai, Yunnan; e & f, P. chalceolus chalceolus (Bates), Guanyin Mt., Guangdong.
Maxillary palpi of Pareuryaptus spp. from China (scale bar = 0.3 mm): a, P. adoxus (Tschitschérine), female from Damenglong, Yunnan; b, P. exiguus Dubault, Lassalle & Roux, male from Naqin Village, Guangxi; c, P. luangphabangensis Kirschenhofer, female from Nanpaxiaozhai, Yunnan; d, P. luangphabangensis Kirschenhofer, male from Jino Mt., Yunnan; e, P. chalceolus chalceolus (Bates), male from Guanyin Mt., Guangdong; f, P. chalceolus formosanus (Jedlička), female from Jialeshui, Taiwan.
Pronota of Pareuryaptus spp. from China (scale bars = 1 mm): a, P. adoxus (Tschitschérine), female from Danuoyou, Yunnan; b, P. exiguus Dubault, Lassalle & Roux, male from Naqin Village, Guangxi; c, P. luangphabangensis Kirschenhofer, male from Nanpaxiaozhai, Yunnan; d, P. chalceolus formosanus (Jedlička), female from Jialeshui, Taiwan; e, P. chalceolus chalceolus (Bates), male from Guanyin Mt., Guangdong; f, P. chalceolus chalceolus (Bates), female from Hanjiang, Fujian.
Body length = 12.2–12.6 mm. Dorsal surface largely black. Terminal maxillary palpimere cylindrical, of similar width as distal end of penultimate one, distinctly longer than penultimate one. Pronotum faintly blue, transversal round (pronotum width / pronotum length = 1.40–1.42), widest a little behind anterior third; pronotum densely and coarsely punctate between basal foveae; lateral margins hardly sinuate in front of posterior angles; posterior angles rounded and obtuse.
This species can be well distinguished from other Chinese species by the terminal maxillary palpimere cylindrical, not wider, but much longer than the penultimate one.
Xishuangbanna, the collection locality of the two specimens we examined, is quite far from South Vietnam, the type locality of P. adoxus. However, we are confident in determining them as P. adoxus because all characteristics are nearly identical to the description and images of this species (
Vietnam, Laos and a new record for China (Yunnan): Fig.
Habitus: Fig.
Body length = 12.6–13.7 mm. Dorsal surface dark brown to black. Terminal maxillary palpimere cylindrical, as long as penultimate one. Pronotum black, rounded, narrower than that of the previous species (pronotum width / pronotum length = 1.24–1.29), widest near middle; pronotum completely smooth between basal foveae; lateral margins hardly sinuate in front of posterior angles; posterior angles rounded and obtuse.
This species can be well distinguished from other Chinese species by the narrower pronotum and lateral margins evenly curved, widest near middle.
Male genitalia: in lateral view, median lobe of aedeagus with ventral margin very weakly curved near middle, apical lamella nearly straight; in dorsal view, median lobe of aedeagus with both lateral margins sinuate, widest near basal third, gradually constricted near apical third, apex rounded with apical lamella very short, apical orifice opened left-dorsally.
This species was originally described from a single female. We herein provide the first record of the male of this species and provide description and illustration for the male genitalia.
Vietnam and a new record for China (Guangxi): Fig.
Habitus: Fig.
Body length = 12.8–14.6 mm. Dorsal surface black. Terminal maxillary palpimere cylindrical, as long as penultimate one. Pronotum black, widely cordate (pronotum width / pronotum length = 1.37–1.44), widest a little behind anterior third; pronotum completely smooth between basal foveae; lateral margins strongly sinuate in front of posterior angles; posterior angles rectangular with sharp apices.
This species can be well distinguished from other Chinese species by its characteristic pronotum that is strongly cordate with evident sinuation in front of posterior angles, which are sharp.
This species is somewhat similar to P. aethiops distributed in Myanmar. Based on the descriptions in literature (
Laos and a new record for China (Yunnan): Fig.
Synonym: Trigonotoma annamensis
Habitus: Fig.
Body length = 11.9-14.5 mm. Dorsal surface black. Terminal maxillary palpimere elongated and ovate, much longer and wider than penultimate one. Pronotum black, widely rounded (pronotum width / pronotum length = 1.33–1.43), widest a little behind anterior third; pronotum densely punctate between basal foveae; lateral margins hardly sinuate in front of posterior angles; posterior angles obtuse.
This species can be well distinguished from other Chinese species by the terminal maxillary palpimere long-ovate, much longer and wider than the penultimate one.
Vietnam and China (Hong Kong, Hainan, Guangxi, Guangdong, Fujian, Hunan): Fig.
Habitus: Fig.
Body length = 11.7 mm. Dorsal surface black. Similar to the nominal-typical subspecies, but different in the pronotum being only sparsely punctate between basal foveae.
China (Taiwan): Fig.
Key to Chinese species and subspecies of Pareuryaptus |
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1 | Pronotum more or less punctate between basal foveae; terminal maxillary palpimere much longer than penultimate one. | 2 |
– | Pronotum completely smooth between basal foveae; terminal maxillary palpimere as long as penultimate one. | 4 |
2 | Terminal maxillary palpimere long-ovate, distinctly wider than distal end of penultimate one. | 3 |
– | Terminal maxillary palpimere cylindrical, not wider than distal end of penultimate one. | P. adoxus (Tschitschérine, 1900) |
3 | Pronotum densely punctate between basal foveae, distributed in Mainland China. | P. chalceolus chalceolus (Bates, 1873) |
– | Pronotum sparsely punctate between basal foveae, distributed in Taiwan, China. | P. chalceolus formosanus (Jedlička, 1962) |
4 | Pronotum lateral margins nearly straight before posterior angles, apex of posterior angles obtuse. | P. exiguus Dubault, Lassalle & Roux, 2008 |
– | Pronotum lateral margins strongly sinuate before posterior angles, apex of posterior angles sharp. | P. luangphabangensis Kirschenhofer, 2011 |
We wish to sincerely appreciate the following colleagues. Mr. Philippe Roux (Paris, France), Mr. Pingzhou Zhu (IZAS), Mr. Sixun Ge (BJFU) and Mr. Wenqi Yin (BJFU) gave us many crucial guides on our work. Mr. Xiaoran Yang (NEFU), together with Mr. Zhaoqi Leng (NKU), shared their photographic experiences and helped us improve our photography skills. Mr. Jiaheng Chen (NJAU) provided us with the specimen of Pareuryaptus chalceolus from Fujian. Dr. Riccardo Sciaky (Milano, Italy) gave us a lot of valuable advice on this paper. This work was supported by Guangxi Fangcheng Golden Camellia NNR Comprehensive Science Investigation (2021) and National Natural Science Foundation of China (31970400).