Singilis (s. str.) crypticus, 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 : 198-199

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

( Figs. 16 , 31 , 34)

Type material. CAMEROON: Holotype ♂, " Cameroun Faro Game | Reserve, 8°23'11.1" N | 12°50'2.1" E 21.IV.2007 | wooded savanna fogging 5, | A24 leg. Jocqué et al.” ( MRAC) . Paratypes: 1 ♀—idem. (cPS); 1 ♀ — " Cameroun Faro Game | Reserve , 8°23'6.2" N | 12°50'7.1" E 25.IV.2007 | wooded savanna fogging 15 A57 | C. pinnata leg. Jocqué et al." (cPS).

Diagnosis. By the body shape and elytral pattern it is extremely similar with other species of this group. Without dissecting male specimens could be rather difficult to distinguish.

Description. Length 5.0– 5.5 mm. Uniformly yellow-brown, one specimen with wide darkish-brown sutural spot behind middle of elytra on 1 – 7 intervals ( Fig. 16 ).

Head with distinct microsculpture and with coarse and deep irregular punctation. Punctures sometimes confluent. Eyes moderately large and bulging.

Pronotum 1.3–1.35 times as wide as head, 1.46 times as wide as long, widest at the middle. Anterior margin straight, anterior angles effaced, sides regularly rounded, weakly or clearly sinuate before slightly acutely prominent posterior angles. Punctation irregular, on the disc sparser than on the head; denser towards lateral and anterior margins. Lateral margin flat, explanate in basal half. Basal grooves indistinct, flat. Microsculpture irregular, slightly transversely polygonal.

Elytra subovate, 1.47–1.55 times as long as wide, widest in the apical third, with irregular, polygonal microsculpture. Striae deep and weakly punctate. Intervals 1–4 convex at humerus, gradually flattened towards apices; other intervals convex at base and slightly convex at apex.

Claws with 6 teeth. Abdominal sterna shiny, except long marginal setae, with short, tiny, barely visible setae throughout. Propleuron slightly wavy rugose towards coxae, mes- and metepisterna smooth.

Aedeagus ( Fig. 31 ). Aedeagal median shaft slightly arcuate between basal bulb and elongate apex. Internal sac with large microtrichial patch, composed of small, sclerotized spicules. Name derivation. Comes from Greek language kryptos "hidden", in reference to its similarity to the other species.

Distribution. Cameroun ( Fig. 34).

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.