Deretus necopinatus Purchart, 2012, sp. nov.
Creators: name: Purchart, Luboš
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Tenebrionidae
Deretus
Deretus necopinatus

description: Deretus necopinatus sp. nov.
(Fig. 8, 9, 10, 17, 22, 27)
Deretus denticollis: Koch 1970: 124 –127 (with figure of habitus, male) (partim); Schawaller 2004: 455 –456 (with figure of habitus).
Type locality. Yemen, Socotra Island, Homhil area.
Type material. Holotype —(13 NMPC): YEMEN, SOCOTRA Island E, Homhil area, 400–510 m, N 12°34´25´´, E 54°18´53´´, 9.–10. ii. 2010, L. Purchart & J. Vybíral lgt. The paratypes —(1Ƥ NMPC; 13 + 1Ƥ SMNS; 53 + 13Ƥ LPCB): same data as holotype; (33 + 8Ƥ LPCB): YEMEN, SOCOTRA Island, Wadi Zirik, 650–670 m, N 12°29’ 35’’, E 53°59’28’’, 30.ii.2010, L. Purchart lgt.; (23 + 2 Ƥ LPCB): YEMEN, SOCOTRA Island, Firmihin, 400–500 m, N 12°28´27´´, E 54°0´54´´, 6.–7. ii. 2010, L. Purchart & J. Vybíral lgt.; (1Ƥ LPCB): Yemen, Socotra Island, North-East “arterial road”, 970 m, N 12°28´1.5´´, E 53°58´31.4´´, 13. vi. 2009, L. Purchart lgt.; (13 + 1Ƥ LPCB): Yemen, Socotra Island, Dixam plateau, Firmihin (Dracaena forest), 12°28.6’N, 54°01.1’E, 490 m, 15.–16.xi.2010, L. Purchart lgt.; (43 + 3Ƥ NMPC): same data as previous, but Jiří Hájek leg.; (83 + 8Ƥ JBCP): same data as previous, but Jan Batelka leg.; (1Ƥ LPCB): Yemen, Socotra Island E, Kesa env., 220–300 m, N 12°39´37´´, E 53°26´42´´, 28.–29. i. 2010, L. Purchart lgt.; (13 LPCB): Yemen, Socotra Island, Aloove area, 270–350 m, N 12°30´58´´, E 54°06´39´´, 3.–4.ii.2010, L. Purchart & J. Vybíral lgt.; (13 + 1Ƥ NMPC): Yemen, Soqotra Is., 2003, 3.xii., Dixam plateau, WADI ZEERIQ, 750m, N12°31’08’’ E53°59’09’’ [GPS], David Král lgt. / / YEMEN – SOQOTRA 2003 Expedition; Jan Farkač, Petr Kabátek & David Král; (1 SMNS): ZOOLOGISCHE EXKURSION, Diksam. März [March] 1999, leg. Wranik {handwritten}; (1 MNHN): Ille de SOCOTRA, 1993– 1994, Canu Jean-Guy rec. {blue, printed}// Muséum Paris, 2001. Coll. générale {blue, printed}.
Differential diagnosis. Deretus necopinatus sp. nov. can be distinguished from the remaining species, with the exception of D. spinicollis, by its conspicuously matt body and from all species by the presence of a patch of sensillae on males’ abdominal ventrites (Fig. 9). From D. spinicollis it differs by having an almost glabrous (only ultra-microscopically and very sparsely pubescent) elytra without impressions and only moderately extended anterior pronotal angles (Fig. 17). In the latter species the elytra are pubescent with yellowish hairs and possess shallow impressions near the humera. The anterior pronotal angles in D. spinicollis are strongly spine-like and elongate (Fig. 18).
Description. Holotype, body length 11.0 mm, width 4.0 mm. Variability of size in paratypes: females—8.0– 14.1 x 3.0– 5.6 mm; males—7.8–11.9 x 2.7–4.3 mm. Body subparallel, dark brown, dull (Fig. 8).
Head coarsely and densely punctate, punctures subequal to eye facets or slightly larger. Space between punctures narrower or equal to their diameter. Eyes reniform, not divided by genae. Clypeus with straight anterior margin and with several long yellowish setae anteriorly. Labrum transverse, punctate, densely covered with long yellowish setae anteriorly. Ventral side of head shiny and coarsely punctate. Mentum transverse with midlongitudinal and smooth gibbosity. Apical labial palpomere broadened, triangular in both sexes. Antennae filiform, long, covered by yellowish setae. Third antennomere prolonged, approximately as long as the two following joints combined. Apical antennomere pale brown, longer in males.
Pronotum (Fig. 17) transverse, punctate, punctures same as on head, except space between punctures slightly larger. Anterior margin broadly and deeply emarginate, anterior corners extended. Lateral margin of pronotum slightly and irregularly waved, arcuate before posterior angles. Basal, lateral, and anterior pronotal margins distinctly bordered. Anterior margin medially obliterated.
Elytra subparallel, shagreened. Flattened (lateral view), with gentle apical declivity (lateral view). Base of elytra bordered only around humeri. Scutellum subtriangular, sparsely punctate. Elytral striae conspicuous, composed of slightly longitudinal punctures, puncture diameter approximately twice that of one eye facet. Elytral interstriae almost glabrous (only ultra-microscopically and very sparsely pubescent), flat, finely and irregularly punctate, puncture diameter less than eye facet diameter. Elytral epipleuron broad, very finely and sparsely punctate, with weak transversal wrinkles.
Prosternum, hypomeron, mesoventrite, mesepisternum, mesepimeron and metaventrite glabrous and densely punctate. Prosternal process widened behind coxae (ventral view). Abdominal ventrites shallowly punctate and finely pubescent. Males with patches of sensillae (Fig. 9).
Legs punctate, covered with yellowish setae. Metatibia medially dentated in males,medially widened in females (Fig. 8, 10).
Aedeagus see Fig. 22, 27.
Etymology. Latin expression for surprising or unexpected. Adjective— necopinatus, - a, - um.
description: Published as part of Purchart, Luboš, 2012, Biodiversity research of darkling beetles on Socotra Island. Part I. The genus Deretus Gahan, 1900 (Coleoptera: Tenebrionidae), pp. 57-68 in Zootaxa 3153 on pages 63-64, DOI: 10.5281/zenodo.211332