Copelatus latipes, Sharp, 1882

Hájek, Jiří & Sheth, Sayali D., 2024, A review of the Oriental Copelatus latipes complex, with the description of two new species (Coleoptera: Dytiscidae: Copelatinae), Zootaxa 5481 (1), pp. 119-130 : 120

Copelatus latipes species complex

Medium sized and broadly oval species (TL: 5.2–6.2 mm, TL/MW: 1.9–2.1). Members of the Copelatus irinus species group, i.e. each elytron with six discal striae and one submarginal stria. Male protibia modified, angled near base, distinctly broadened anteriorly, club shaped. Male pro- and mesotarsomeres 1–3 distinctly broadened, with four rows of adhesive setae on their ventral side; claws simple. Median lobe of aedeagus sickle-shaped in lateral view; towards 2/3 or 3/4 of its length with 2–3 distinct ‘teeth’ on ventral side. Parameres broad, ‘D’-shaped, often sinuated or with serration on inner margin; apex short and broad; apical lobe long, club-shaped. Female identical to male in habitus; dorsal sculpture usually slightly more impressed, thus of submatt appearance; elytra sometimes with short longitudinal striolae; protibia simple, not angled basally and only slightly broadened distally; pro- and mesotarsomeres not broadened, without adhesive setae. The members of the complex are distributed in the Oriental Region: India, Sri Lanka, Nepal, Bangladesh, Laos, Cambodia, Malaysia, and Indonesia (Kalimantan).