Deretus spinicollis Schawaller, 2004

Purchart, Luboš, 2012, Biodiversity research of darkling beetles on Socotra Island. Part I. The genus Deretus Gahan, 1900 (Coleoptera: Tenebrionidae), Zootaxa 3153, pp. 57-68 : 64

publication ID	https://doi.org/ 10.5281/zenodo.211332
DOI	https://doi.org/10.5281/zenodo.6180210
persistent identifier	https://treatment.plazi.org/id/732487F5-BD4A-6E7D-EBEF-A06FFE62F84B
treatment provided by	Plazi
scientific name	Deretus spinicollis Schawaller, 2004
status

Treatment

( Fig. 11, 12 View FIGURES 8 – 12 , 18, 23 View FIGURES 19 – 23 , 28)

Deretus spinicollis Schawaller, 2004: 456 –457 (with figure of habitus).

Type locality. Yemen, Socotra Island, Haghier mountains.

Type material examined. (3 SMNS): Yemen, Socotra Island, Haghier Mountains, 23.II.1999, K. Van Damme, HLMD-Col-920-PT {white, printed} // PARATYPUS, Deretus spinicollis n. sp., Schawaller 2000 {red label, printed}.

Additional material. (43 + 2Ƥ LPCB): Yemen, Socotra Island, Skant area, 1300–1500 m, N 12°34’33’’, E 54°01’31’’, 31.i.–1.ii.2010, L. Purchart lgt.; (13 LPCB): Yemen, Socotra Island, Al Haghier Mts., Scant Mt. env., 12°34.6’N, 54°01.5’ E, 1450m, 12–13.xi.2010, J. Bezdĕk leg.; (5Ƥ + 4 3 NMPC): same data as previous, Jiří Hájek leg.; (13 + 1Ƥ JBCP): same data as previous, but Jan Batelka leg., ex larvae.

Differential diagnosis. Variability of size in females—13.3–16.1 x 5.1–6.5 mm; males—11.9–13.4 x 4.6–5.4 mm. This species can easily be separated from the other Deretus species by its extremely elongate spine-like anterior pronotal corners ( Fig. 18) and, usually, by its larger size. D. bezdeki sp. nov., which also possesses spine-like anterior pronotal corners, is much smaller and has large acute teeth on the sides of the pronotum ( Fig. 13) and large tubercles on the elytra.