Ptomaphaginus latimanus, Schilthuizen & Perreau, 2008

Schilthuizen, Menno & Perreau, Michel, 2008, New species and new records of Ptomaphaginus Portevin from the Sunda region, Southeast Asia (Coleoptera: Leiodidae: Cholevinae), Zool. Med. Leiden 82 (19), pp. 189-210 : 196

publication ID	https://doi.org/ 10.5281/zenodo.3576287
DOI	https://doi.org/10.5281/zenodo.6231990
persistent identifier	https://treatment.plazi.org/id/F97A87E2-7407-E667-66E7-FF65FEACF9C9
treatment provided by	Plazi
scientific name	Ptomaphaginus latimanus
status	sp. nov.

Treatment

Ptomaphaginus latimanus View in CoL spec. nov.

( figs 22-23 View Figs 16-25. 16 ).

Type material.— Holotype ♂: Malaysia: Sabah: Mount Trus Madi (5˚34.152’N 116˚29.638’E), 1400 m alt., 23-28.x.2001, pitfall with lamb, leg. M. Schilthuizen ( BOR) . Paratypes same collection data as holotype: 5 ♂♂ (one of which preserved in 100% ethanol) 2 ♀♀ ( BOR) .

Diagnosis.— Habitus slender, ovoid. Elytra 1.15-1.25 times as long as their combined width (length measured from the caudal tip of the scutellum to the elytral apices; n = 5). Aedeagus ( figs 22-23 View Figs 16-25. 16 ) short and wide, with two elongated apical lateral ‘wings’ and a short terminal processus. Antennae short, as long as the width of the head. Male with broad and indistinct central notches on the 5 th and 6 th visible abdominal sternite.

Description.— Habitus slender, ovoid. Moderately pigmented: mostly chocolate to chestnut brown, the thoracal disk darker; the legs, the elytral apices, the thoracal edges and the tips and the bases of the antennae yellowish. Length 2.3-2.9 mm (n = 5). Antennae short and condensed, as long as the width of the head (n = 4). Antennal articles 6, 9, and 10 square in the female, wider than long in the male. Male protarsi strongly dilated: the protibia at its largest width (excluding the lateral spines) is as wide as the first article of the protarsus (n = 1). In the male, the ventral sides of profemur and protibia do not carry any long hairs. Thorax 1.60-1.75 times as wide as long (n = 4), the caudal corners slightly drawn out. The mesosternal carina is strongly developed, its edge somewhat thickened. Elytra not very slender, 1.15-1.25 times as long (measured from the caudal tip of the scutellum) as their combined width (n = 5). Elytral apices truncated in both sexes. The 4 th visible abdominal sternite in the male with no central point at its caudal edge; the 5 th and 6 th with a broad and relatively indistinct central notch. Aedeagus ( figs 22-23 View Figs 16-25. 16 ) in dorsal view short and wide, approximately 1.5 times as long as wide. Apically abruptly narrowing, and there adorned with two long lateral ‘wings’. The tip is composed of a short, obtuse, triangular processus. In lateral view, the aedeagus is almost not curved, expect for the apical quarter, which is bent ventrad under a distinct angle. Male genital segment broad, at the apex slightly triangular, two times as long as wide.

Distribution.— This species has been found only in lower montane forest on Mount Trus Madi.

Remarks.— Based on the aedeagal shape, P. latimanus is closely related to P. kinabaluensis , from which it differs strongly in the habitus, which is much more slender in P. kinabaluensis . Also, the two differ markedly in secondary sexual characteristics: P. kinabaluensis has drawn-out elytral apices in the female, only slightly dilated male protarsi and a central point on the 4 th abdominal sternite in the male, whereas P. latimanus has normal abdominal sternites and elytral apices, but strongly dilated male protarsi.

Etymology.— latimanus , a combination of latus, a Latin adjective, meaning ‘broad’, and manus, a Latin noun, meaning ‘hand’. The name refers to the strongly dilated protarsi of the male.