Platyderus (Eremoderus) vanensis, Guéorguiev & Wrase & Assmann & Muilwijk & Machard, 2022

Gueorguiev, Borislav, Wrase, David W., Assmann, Thorsten, Muilwijk, Jan & Machard, Patrice, 2022, Taxonomic revision of the African and Southwest Asian species of Platyderus Stephens, subg. Eremoderus Jeanne (Coleoptera, Carabidae, Sphodrini), Deutsche Entomologische Zeitschrift 69 (1), pp. 71-122 : 71

5. Platyderus (Eremoderus) vanensis sp. nov.

Figs 1E , 8E , 10E , 13D, E , 16

Type locality.

Turkey, Van Province, Gevaş Town environs.

Note on type locality.

Gevaş Town is situated on the southern shore of Van Lake. The holotype was perhaps collected in vicinities of the town.

Type material.

Holotype: 1♂, 'TURCIA or. Van / Gevas 29.6.1993 / lgt. J. Růžička // Platyderus / cf. / punctiger / (REICHE & SAULCY) / WRASE det. 2008' (cWR). Paratypes: 1♀, 'TURKEY OR. / GEVAS env., 2100-2600m / (CADIR DAGI) / 1993-06-29, Klíma lgt. // Platyderus / cf. / punctiger / (REICHE & SAULCY) / WRASE det. 2008' (NMNHS); 1♂, 1♀, 'Resadiye 1900m / TR: Bitlis 6.91 / coll. B. Lassalle’ (cLAS); 1♀, 'CE TURKEY, prov. Bitlis / 38°37'N, 42°16'E 2290m / Şentepe env. / Nemrut Mt. - crater / 24.VI.08 lgt. E.Hajdaj // COLL. / E. & P. HAJDAJ / JEŽOV / Czech Republic’ (cHAJ); 5♂♂, 2♀♀, 'TR, Bitlis, Yelkenli / Van lake, ca. 1800 m / ~ 38°28'N, 42°32'E / 21.IV.-20.V.2014 / pitfall, leg. C. Reuter’ (NMNHS, cREU, cWR); 1♀, 'col de Buglan 1500m / TR Mus 6.88 / col. B. Lassalle’ (cLAS); 1♂, 'E Turkey, Mus / 8km SE Solhan, Buglan / Gec., 1700-1800m / 38°56'N, 41°08'E 18. - / 20.VI.05 lgt. E.& P. Hajdaj’ (cHAJ); 3♂♂, 5♀♀, 'TR, Bingöl / Muş / Buğlan Geçidi, 1640 m / 21.IV. - 11.V.2014 / pitfall, leg. C. Reuter’ (NMNHS, cREU, cWR).

TME: 22 specimens. TGE: 4♂♂, 2♀♀.

Etymology.

An adjective derived from the geographical name Van.

Diagnosis.

The new species is most closely related to P. vrabeci sp. nov., but easily differs from it by the apical lamella of the median lobe (dorsal and ventral view) that is less symmetrical and shorter (Fig. 10E ), conical shape of bursa copulatrix (Fig. 13D, E ), darker coloration of the integument, elytral striae and striole more coarsely punctate and smaller value PW/ PА (1.32-1.41, vs. 1.41-1.42).

Description.

Habitus. Specimens of middle size for Platyderus species (BL: 6.85-8.40 mm; BW: 2.25-2.70 mm), with subelongate, slender body (Fig. 1E ). Measurements and ratios. See Table 1 . Color and lustre. Body dorsally and ventrally mostly reddish-brown, appendages (antennae, palpi and legs) lighter colored than body, some specimens from Buğlan Geçidi with elytra almost black, and head, pronotum and ventral surface reddish-brown. Integument rather shiny. Microsculpture and punctation. Pronotum and elytral intervals 1-5 (rarely also 6-7) without distinct sculpticells or with very faint ones, intervals 6-9 mostly (all specimens from Yelkenli) with distinct isodiametric sculpticells. Ventral surface mostly without visible sculpticells, sometimes with scarcely-visible isodiametric meshes. Pronotum coarsely and densely punctate in basal third and adjacent lateral areas, punctures at sides often reaching medial third. Abdominal ventrites 1-4 punctate at sides. Head. About two thirds as wide as pronotum (PW/HW= 1.30-1.43). Antennae long, with last three antennomeres exceeding base of pronotum. Eyes long, subconvex. Labrum subrectangular, with anterior margin slightly concave. Frontal furrows shallow, subfoveolate. Paraorbital sulci moderately deep, ending slightly before level of posterior supraorbital pore. Thorax. Pronotum wider than long (PW/PL= 1.13-1.24), widest point at anterior third. Anterior transverse impression barely distinct, posterior one distinct medially. Sides sinuate, convex anteriorly, concave posteriorly; anterior bead reduced in medial 1/10. Metepisternum slightly longer than wide, MA/MI= 0.87-0.93. Elytra. Elongate, about one and two thirds as long as wide (EL/EW= 1.61-1.73), two and a half times as long as pronotum (EL/PL= 2.52-2.74), and one third wider than pronotum (EW/PW= 1.22-1.36), with widest point at medial fifth. Parascutellar striole and striae deeply impressed (specimens from Buğlan Geçidi with striae 7-8 less impressed than others); parascutellar striole short, not connected with stria 1. Interval 3 with three discal setiferous punctures. Umbilicate setiferous punctures consisting of 16-17 (rarely 18) each side. Legs. Posterior side of profemur with one seta in basal third and one in medial third. Mesofemur with three or four setiferous punctures (three specimens with two on one side) on anterior side ventrally. Anterior side of metafemur ventrally with two long setae, one in basal third and one in medial third. Male genitalia. Median lobe of aedeagus in lateral view, with elongate basal bulb, long and broad shaft moderately constricted proximally, and short, straight apex; median lobe in ventral view straight, about 3.4 times longer than wide; apical lamella (dorsal view) short, symmetrical, rounded at tip, with sides straight or slightly convex. Internal sac in lateral view (Fig. 8E ) with ventral sclerite distinctly broadened and rounded distally; same in ventral view (Fig. 10E ), with dorsal sclerite forming a slightly sclerotized and short left-sided protuberance and a convex and long right-sided curve, and ventral sclerite narrow and nearly straight (only just scarcely bent to left). Female genitalia (Fig. 13D, E ). Apical gonocoxite with semi-pointed apex and two dorsolateral ensiform setae. Spermathecal canal connected in medial third of receptaculum.

Habitat.

Christoph Reuter (CR) and Bernard Lassalle (BL) kindly provided us with information on habitat preferences. The specimens found by CR near Yelkenli were collected in a stunted oak forest. Underground is karst rock, in the middle of the tiny valley flows a small stream that still carries water, at least in spring. The series found by CR at Buğlan Geçidi, 1640 m, was collected in a semi-open landscape with a low, sparse oak forest of rather small, thin trees, a lot of scrubland, in between meadows, at least in some places, again karst rock, weathered rocks, and a lot of foliage. BL declare that he found a female specimen at Buğlan Geçidi, 1500 m, in "oak bushes"; same stated that, in Resadiye one male and one female of the new species was collected in small oak grove in a little valley.

Distribution.

Turkey (provinces of Bingöl and Muş: Buğlan Geçidi; Bitlis Province; Van Province; Fig. 16 ). In Bitlis Province, the species inhabits the Nemrut volcanic massif west of Bitlis Town and the mountain region south of the Yelkenli (= Reşadiye) Bucaği. In Van Province, P. vanensis sp. nov. lives around Gevaş Town and in the Çadir Daği, a massif situated south of the town aforementioned. In the border area of provinces of Bingöl and Muş, it lives along the pass Buğlan Geçidi.

Figures

Figure 1. Dorsal habitus. A. Platyderus (Eremoderus) chatzakiae, sp. nov., holotype; B. P. (E.) weiratheri Maran, 1940, lectotype and its labels; C. P. (E.) felixi, sp. nov., holotype; D. P. (E.) iranicus, sp. nov., male paratype, Cheri pass 20 km W Samsami, Chahar Mahal va Bakhtiari Province, Iran; E. P. (E.) vanensis, sp. nov., holotype; F. P. (E.) vrabeci, sp. nov., holotype. Scale bars: 1 mm.

Figure 8. Median lobe of aedeagus, left lateral view. A. Platyderus (Eremoderus) chatzakiae, sp. nov., holotype; B. P. (E.) weiratheri Maran, 1940, lectotype; C. P. (E.) felixi, sp. nov., holotype; D. P. (E.) iranicus, sp. nov., holotype; E. P. (E.) vanensis, sp. nov., holotype; F. P. (E.) vrabeci, sp. nov., holotype; G. P. (E.) lassallei, sp. nov., holotype; H. P. (E.) ledouxi Morvan, 1974, male specimen, 10 km S Hasan Keif, Mazandaran Province, Iran; I. P. (E.) taghizadehi Morvan, 1974, male specimen, Tochal, Tehran Province, Iran; J. P. (Platyderus) sp., male specimen, vicinity of Izmir City, Turkey. Scale bars: 0.2 mm.

Figure 10. Median lobe of aedeagus, ventral view. A. Platyderus (Eremoderus) chatzakiae, sp. nov., holotype; B. P. (E.) weiratheri Maran, 1940, lectotype; C. P. (E.) felixi, sp. nov., holotype; D. P. (E.) iranicus, sp. nov., holotype; E. P. (E.) vanensis, sp. nov., holotype; F. P. (E.) vrabeci, sp. nov., holotype; G. P. (E.) lassallei, sp. nov., holotype; H. P. (E.) ledouxi Morvan, 1974, male specimen, 10 km S Hasan Keif, Mazandaran Province, Iran; I. P. (E.) taghizadehi Morvan, 1974, male specimen, Tochal, Tehran Province, Iran; J. P. (Platyderus) sp., male specimen, vicinity of Izmir City, Turkey; K. P. (P.) sp., male specimen, Boz Daglar Mtn., Turkey. Scale bars: 0.2 mm.

Figure 13. Spermathecal complex and gonocoxites, ventral view. A. Platyderus (Eremoderus) weiratheri Maran, 1940, topotype female specimen; B. P. (E.) felixi, sp. nov., topotype female paratype; C. P. (E.) iranicus, sp. nov., topotype female paratype; D. P. (E.) vanensis, sp. nov., topotype female paratype; E. P. (E.) vanensis, sp. nov., female paratype, col de Buglan 1500 m, border area of Bingoel and Mus provinces, Turkey; F. P. (E.) vrabeci, sp. nov., topotype female paratype. Scale bars: 0.5 mm. Abbreviations: ag - apical gonocoxite; at - atrium; bc - bursa copulatrix; bg - basal gonocoxite; co - common oviduct; rc - receptaculum; sg - spermathecal gland; smc - seminal canal; spc - spermathecal canal.

Figure 16. Distribution of species from subgenus Platyderus Eremoderus in the western Aegean Sea Region and Turkey: Platyderus chatzakiae sp. nov. (red circle), P. weiratheri (blue circles), P. vanensis sp. nov. (brown circles), and P. vrabeci sp. nov. (yellow circle).