Singilis (s. str.) pallens, Anichtchenko, Alexander, 2016

Anichtchenko, Alexander, 2016, Contribution to the knowledge of the genus Singilis Rambur, 1837 of Africa (Coleoptera: Carabidae: Lebiini). Part IV, Zootaxa 4158 (2), pp. 183-202 : 199-200

Singilis (s. str.) pallens sp. n.

( Figs. 17 , 32 )

Type material. NAMIBIA: Holotype, ♂ —" Namibia : Brandberg | Pools on Wasserfallfläche | 21°10'40''S 14°33'08''E | 2000m. 21.x.1998 | R. Butlin & J. Altringham | at light 1900-0700" ( MNHUB) . Paratypes: 4 ♂, 2 ♀ — idem.; 2 ♂, 3 ♀ —" Namibia: Brandberg | Hungorob Ravine Mouth | 21°13'36''S 14°31'00E | 700m, 28.x.1998 | R.Butlin & J.Altringham | at light 1900-0700" ; 2 ♂, 4 ♀ —" Namibia: Brandberg | NE side Hungorob ravine | 21°11'30''S 14°31'40E | 1200m, 26.x.1998 | R.Butlin & J.Altringham | at light 1900-0700" ; 1 ♂ —" Namibia: Brandberg | Plateau valley at | 21°10'46''S 14°32'52E | 1950m, 260. x.1998 | R.Butlin & J.Altringham | at light 1900-0700" ; 1 ♂, 2 ♀ —" Namibia: Brandberg | Wasserfallfläche at| 21°10'42''S 14°32'55E | 2000m, 22.x.1998 | R.Butlin & J.Altringham | at light 1900-0700" ; 1 ♂, 2 ♀ —" Namibia: Brandberg | 500m N into Hungorob | 21°13'S 14°31'E | 700m, 27.x.1998 | R.Butlin & J.Altringham | at light 1900-0700" ; 18 ♂, 16 ♀ —" Namibia: Brandberg | inside Hungorob ravine | 21°11'30''S 14°31'40''E | 1200m, 25.x.1998 | R.Butlin & J.Altringham | at light 1900- 0700" ; 1 ♂ —" Namibia: Brandberg | Wasserfallfläche 1960m | 21°10'77''S 14°32'87''E | 07.iv.1999 S van Noort & | S.G.Compton. UV Light | trap, well vegetated valley | below waterfall. Bushy | Karroo-Namib shrubland" ; 1 ♂ — " Namibia: Brandberg | Messum Valley 700m | 21°13'29''S 14°30'98''E | 03.iv.1999 S van Noort & | S.G.Compton.

UV Light | trap. Sparsely vegetated | river valley. Bushy | Karroo-Namib shrubland"; 4 ♂, 2 ♀ —" Namibia: Brandberg | Hungorob river at | 21°13,5'S 14°31,1'E | 1200m, 09.xi.1998 | A.H. Kirk-Spriggs | light trap sample" ( MNHUB, MRAC, DUBC).

Diagnosis. Based on small body size and cordate pronotum with acutely prominent posterior angles, this new species can be included within the " stigma " group of species ( Anichtchenko 2012b). In body size and shape, elongate elytra, cordate pronotum with long and deep median line, it is similar with S. (s. str.) fasciatus ,, but can be easily distinguished by uniformly yellow-brown coloration.

Description. Length 4.0– 4.8 mm. Uniformly yellow-brown ( Fig. 17 ).

Head and clypeus matt, due to strong, almost isodiametric microsculpture throughout. Uniformly punctate, with punctures separated by 1–2 their diameters. Eyes large and bulging. Temples short, smooth, without microsculpture. Labial palps of males with terminal palpomere strongly securiform.

Pronotum cordate, 1.15 times as wide as head, 1.4–1.46 times as wide as long, widest behind marginal setae. Marginal pore situated in 1.5 of it diameter from margin of pronotum. Anterior margin straight, anterior angles slightly marked, sides of pronotum irregularly rounded, sinuate before acutely prominent posterior angles. Disc mate, due to strong irregular microsculpture, deeply punctate and weakly wavy rugose. Median line deep and long. Lateral margin flat, explanate in basal half. Basal grooves indistinct, flat.

Elytra 1.51–1.6 times as long as wide, sides subparallel, widest in the apical third, microsculpture almost squamiform, especially in apical half. Striae narrow and impunctate. Intervals slightly convex at humerus, gradually flattened towards apices.

Claws with 4 teeth. Ventral sternites moderately pubescent throughout by short setae. Propleuron, mes- and metepisterna smooth.

Aedeagus ( Fig. 32 ). Aedeagal median lobe moderately broad, apex broad and short. Internal sac with microtrichial patch.

Name derivation. From latin word pallens , the name reflects the pale yellow colour of the species.

Distribution. Namibia.

Figures

FIGURES 13 – 18. Habitus of Singilis (s. str.): 13 — S. zonata Chaudoir, 1878 (Turtle Bay, Kenya); 14 — S. somalicus sp. n., Holotype; 15 — S. haekeli sp. n., Holotype; 16 — S. crypticus sp. n., Paratype; 17 — S. pallens sp. n., Paratype; 18 — S. parvulus sp. n. Holotype.

FIGURES 29 – 33. Aedeagus of Singilis (s. str.): 29 — S. somalicus sp. n. Holotype; 30 — S. haekeli sp. n.; 31 — S. crypticus sp. n., Holotype; 32 — S. pallens sp. n. Holotype; 33 — S. parvulus sp. n. Holotype.