Biodiversity Data Journal :
Taxonomy & Inventories
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Corresponding author: Gökhan Gündüz (biyogok@gmail.com)
Academic editor: Alireza Zamani
Received: 18 Jul 2023 | Accepted: 16 Aug 2023 | Published: 17 Aug 2023
© 2023 Gökhan Gündüz
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:
Gündüz G (2023) A new species of Paracedicus Fet, 1993 (Araneae, Desidae) from Turkey. Biodiversity Data Journal 11: e109714. https://doi.org/10.3897/BDJ.11.e109714
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The desid spider genus Paracedicus Fet, 1993 comprises seven species distributed in the western Palaearctic. From Turkey, only Paracedicus baram Levy, 2007 has been recorded so far.
A new species, Paracedicus turcicus sp. nov., is described, based on specimens of both sexes collected in Eastern Anatolia. Detailed morphological description and photographs are provided. Additionally, a key to all species of the genus and a distribution map are provided.
Cedicinae, description, Eastern Anatolia, spider, Turkey
Paracedicus Fet, 1993 consists of seven species distributed in the western Palaearctic Region. Amongst these species; P. feti Marusik and Guseinov, 2003 is known from Azerbaijan; P. ephthalitus (Fet, 1993) from southern Turkmenistan; P. gennadii (Fet, 1993) from Iran and Turkmenistan. P. kasatkini Zamani and Marusik, 2017 and P. darvishi Mirshamsi, 2018 are distributed in northeast Iran. P. baram is known from Israel and Turkey; P. geshur Levy, 2007 from Israel (
Studies on the genus are still not at a sufficient level. Discovery of new findings related to the genus is quite likely, especially in relatively less explored regions such as eastern and north-eastern Turkey.
In this study, a new species, P. turcicus sp. nov., is described, based on specimens collected from the Eastern Anatolian Region of Turkey. A key to all species of the genus and their distribution map are provided. In Turkey, the genus was recorded for the first time by
All specimens were examined and measured using an Olympus SZ 11. Photographs were taken using a YW500 camera attached to the stereomicroscope. Measurements were obtained using S-EYE software from the dorsal side of the body parts and are reported in millimetres (mm). The lengths of leg segments are listed as follows: total length (femur, patella, tibia, metatarsus, tarsus). Prior to photography, the epigyne was cleared in a 10% potassium hydroxide (KOH) aqueous solution. The description and photographs of the male palp are based on the left one. The colouration pattern is described, based on specimens preserved in 70% ethanol. The morphological terminology follows
The following abbreviations are used in the text and figures:
Depository
ZMUU Zoological Museum of the Bursa Uludağ University, Turkey (R.S. Kaya).
Male: Holotype (ZMUU). Habitus as in Fig.
Legs: Legs yellow, with numerous spines (Fig.
Leg spination in male of P. turcicus sp. nov. (Do-Pr-Re-Ve, 7 = 3p+1, p: pair).
Legs | Fe | Pt | Ti | Mt | Ta |
I | 2-1-0-0 | 0-0-0-0 | 0-1-0-6 | 0-0-0-7 | 0-0-0-0 |
II | 2-1-0-0 | 0-0-0-0 | 0-1-0-6 | 0-1-0-7 | 0-0-0-0 |
III | 2-0-1-0 | 0-1-0-0 | 0-0-2-6 | 6-1-0-7 | 0-2-2-4 |
IV | 2-0-1-0 | 0-0-0-0 | 0-2-2-6 | 6-1-0-7 | 0-2-2-4 |
Chelicerae: Chelicerae dark brown (Fig.
Eye diameters and interdistances: AME: 0.07; ALE: 0.11; PME: 0.07; PLE: 0.08. ALE-AME: 0.10; AME-AME: 0.04; ALE-PLE: 0.04; PLE-PME: 0.15; PME-PME: 0.14; AME-PME: 0.05. PER: 0.75. AER: 0.58.
Gnathocoxae dark yellow with white patch distally, non-convergent. Labium similar in colour to gnathocoxae.
Abdomen: Abdomen greyish-yellow, with a dark pattern dorsally (Fig.
Spinnerets: Spinnerets light greyish-yellow. Apical segment approximately one-sixth length of basal segment.
Palp: Femur without apophysis. Patella with two closely-positioned apophyses. One of them considerably larger (as wide as patella), with a blunt tip, dark-coloured, rectangular shape from dorsal view. Second one smaller, slightly bending retrolaterally and lighter. Tibia elongated diagonally and with several scattered long spines. Cymbium globular, with short hairs dorsally. Tegulum oval and without any projections or outgrowths. Median apophysis lamellar, semi-transparent, quite small and flat, crescent-shaped, adjacent to base of conductor and extending over dark-coloured tegulum (Fig.
P. turcicus sp. nov. A Chelicerae of female, ventral. B Spinnerets of female, ventral. C Habitus, female. D Male palp, ventral. Abbreviations: c – conductor, cl – colulus, ctf – cheliceral transverse folds, e – embolus, ma – median apophysis, t – tegulum. Scale bars: 1.00 mm (A); 0.2 mm (B); 1 mm (C); 0.3 mm (D).
Female: Paratype (ZMUU). Habitus as in Fig.
Legs: Legs as in male; but lighter. Measurements of legs: I: 5.35 (1.72, 0.63, 1.26, 1.01, 0.73), II: 4.52 (1.37, 0.56, 1.02, 0.93, 0.64), III: 4.29 (1.31, 0.47, 0.94, 0.88, 0.69), IV: 6.01 (1.76, 0.52, 1.52, 1.36, 0.85). Spination is given in Table
Leg spination in female of P. turcicus sp. nov. (Do-Pr-Re-Ve, 7 = 3p+1, p: pair).
Legs | Fe | Pt | Ti | Mt | Ta |
I | 2-1-0-0 | 0-0-0-0 | 0-0-0-7 | 0-0-0-7 | 0-0-0-0 |
II | 2-1-0-0 | 0-0-0-0 | 0-0-0-6 | 0-1-0-7 | 0-0-0-0 |
III | 2-2-1-0 | 0-1-0-0 | 2-0-0-6 | 4-2-2-4 | 0-0-2-0 |
IV | 2-0-0-0 | 0-0-0-0 | 0-0-2-4 | 2-1-2-7 | 0-0-2-0 |
Chelicerae: Chelicerae as in male, but lighter and with larger first (the most distal one) of retromarginal teeth (Fig.
Eye diameters and interdistances: AME: 0.09; ALE: 0.13; PME: 0.10; PLE: 0.09. ALE-AME: 0.07; AME-AME: 0.04; ALE-PLE: 0.03; PLE-PME: 0.13; PME-PME: 0.16; AME-PME: 0.05. PER: 0.84. AER: 0.65.
Gnathocoxae and labium as in male; but lighter.
Abdomen and spinnerets as in male; but slightly lighter (Fig.
Epigyne: Simple, fovea surrounded by an intact sclerotised layer anteriorly and laterally. Fovea approximately twice as long as its width, narrowing towards anterior. Posteriorly, with extending transversely straight strip-shaped median plate tapering in middle and extending inwards. Vulva complex. Opaque and membranous structures extending inside epigyne, forming a pair of ear-like structures on both sides of vulva and covering copulatory ducts and spermathecae. Copulatory ducts wide. Spermathecae tubular, adjacent to ear-like opaque structures. Fertilisation ducts prominent and extending inwards (Fig.
Epigyne and vulva of P. turcicus sp. nov. A Epigyne, ventral. B Macerated epigyne, ventral. C Vulva, dorsal. D Vulva, lateral. E Vulva, anterior. F Vulva, posterior. Abbreviations: cd – copulatory duct, co – copulatory opening, ef – epigastric furrow, fd – fertilisation duct, fo – fovea, mp – median plate, om – opaque membrane, s – spermatheca. Scale bar: 0.5 mm.
Paracedicus: Paracedicus can be distinguished from related genera Cedicus Simon, 1875 and Cedicoides Charitonov, 1946 by genital characters. These can be listed as follows: median apophysis is present in species of Paracedicus, while it is absent in those of Cedicus and Cedicoides. In Cedicoides species, a prominent terminal apophysis is present in the palp, whereas this structure is absent in Paracedicus species. Additionally, in Cedicoides species, the conductor extends apically and the embolus is separated from the conductor, whereas in Paracedicus, the conductor is inclined retrolaterally and the embolus is situated within the conductor groove (
The new species is most closely related to P. feti. It can be differentiated from P. feti and/or other congeners based on these characters: 1- Size and shape of median apophysis (smaller in P. feti; larger in P. baram, P. geshur and P. ephthalitus than new species), 2- thickness of embolus (thinner in P. feti than new species), 3- orientation of conductor (not bending towards apical like P. darvishi or towards basal like P. ephthalitus and P. gennadii in new species), 4- size and shape of patellar apophyses (The new species bears two apophyses; one being as wide as patella and rectangular, while the other is slender and inclined. Other congeners have less wide patellar apophyses.), 5- morphology of palpal tibia (elongated diagonally in new species unlike P. feti), 6- length of epigynal fovea, (longer than wide in new species, but wider than long in all other congeners, except for P. kasatkini), 7- structure of vulva (covered with opaque membrane in new species unlike P. feti), 8- colouration and pattern of abdomen (lighter than P. darvishi and P. kasatkini in new species; new species with an abdominal pattern unlike P. kasatkini).
The specific name is an adjective referring to the country where it was found.
The specimens were collected under stones from the northern slopes of mountains located in the southern part of Muş Basin, which is an important transit region between Central and Eastern Anatolia. The region is predominantly characterised by semi-arid oak forests and the presence of Irano-Turanian floral elements as ground vegetation. Furthermore, occurrences of maquis formations are observed in areas where oak forests have been degraded by anthropogenic impacts (Fig.
The specimens were collected from their silken retreats under stones.
Key to Species of Paracedicus spp. |
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1 | Male | 2 |
– | Female | 8 |
2 | Both patellar apophyses less wide than patella and more or less pointed | 3 |
– | One of patellar apophyses as wide as patella and blunt-ended, while other one smaller and pointed. | P. turcicus sp. nov. |
3 | Conductor bending towards basal | 4 |
– | Conductor bending towards apical or towards retrolateral at almost a right angle | 5 |
4 | Median apophysis distinctly long and protruding | P. ephthalitus |
– | Median apophysis not long and not protruding, tubercle-like-shaped | P. gennadii |
5 | Conductor bending towards apical | P. darvishi |
– | Conductor bending towards retrolateral at almost a right angle | 6 |
6 | Tegular projection absent at proximal of conductor | P. feti |
– | Tegular projection present at proximal of conductor | 7 |
7 | Median apophysis large and hook-shaped | P. baram |
– | Median apophysis smaller and finger-like-shaped | P. geshur |
8 | Median plate absent | 9 |
– | Median plate present | 10 |
9 | Fovea wider than long | P. gennadii |
– | Fovea longer than wide | P. kasatkini |
10 | Epigyne with teeth | 11 |
– | Epigyne without teeth | 12 |
11 | Median plate wider than fovea | P. baram |
– | Median plate as wide as fovea | P. geshur |
12 | Fovea twice as long as its width | P. turcicus sp. nov. |
– | Fovea wider than long | 13 |
13 | Epigynal plate oval | P. feti |
– | Epigynal plate more or less rectangular-shaped longer than wide (approximately 1.25 times) | P. ephthalitus |
Cedicus was described in the family Agelenidae C. L. Koch, 1837 by
When comparing the characteristics of the observed features in the new species with the data available in the literature, several noteworthy points can be listed, which could potentially be considered as important: within all Paracedicus species, the presence of median apophysis is quite evident. Amongst the sclerites of the palp, the structure that exhibits the greatest variation within the genus is the tegular projection, which is observed in the Israeli species, but not in others. Regarding the evaluation of patellar apophyses, the new species shows closer resemblance to the Israeli species in terms of its relatively blunt structure, size and lack of patellar teeth. Amongst all congeners, the largest patellar apophysis is observed in P. turcicus sp. nov. In P. feti and other species, the patellar apophyses are characterised by two sharp-pointed and relatively slender structures. Setting aside the structure of the patellar apophyses, P. turcicus sp. nov. appears to be most closely related to P. feti in terms of its overall resemblance.
Considering the preferred habitats of Paracedicus species and distribution of the genus, this study has provided additional evidence supporting the potential presence of other species in the region.
I am grateful to Dr. Rahşen S. Kaya for her valuable comments on the manuscript.