Ptomaphaginus kinabaluensis, 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 : 195

Ptomaphaginus kinabaluensis spec. nov.

( figs 24-25 ; 29-30 ).

Type material.— Holotype ♂: Malaysia: Sabah: Mount Kinabalu: Kinabalu Park Headquarters , 1500 m alt., 13-18.i.2001, pitfall with lamb, leg. M. Schilthuizen ( BOR) . Paratypes same collection data as holotype: 4 ♂♂ 3 ♀♀ ( BOR) ; same locality, 16.v.1987, leg. A. Smetana: 1 ♀ ( MHNG) ; same locality, 21.v.1987, leg. A. Smetana: 2 ♂♂ ( MHNG, CMPR), 1 ♀ ( CMPR) ; same locality, 12.viii.1988, leg. A. Smetana: 1 ♂ ( MHNG) ; same locality, 5.viii.1988, leg. A. Smetana: 2 ♂♂ ( MHNG, CMPR) ; Malaysia: Sabah: Mount Kinabalu: Mempening trail, 1600 m, 17.v.1987, leg. A. Smetana: 3 ♂♂ ( MHNG; CMPR) ; Malaysia: Sabah: Crocker Range, 1600 m, km 51 rte Kota Kinabalu, Tambunan , 18.v.87, leg. Burckhardt & Löbl, 1 ♂ ( MHNG) ; Malaysia: Sabah: Mt. Kinabalu , 1550 m., 29.iv.1987, leg. Burckhardt & Löbl ( MHNG) .

Additional material (not included in the type series).— Mount Kinabalu , 13-18.i.2001, 1 specimen of unidentified sex in 70% ethanol, 1 specimen of unidentified sex in 100% ethanol ( BOR). (For full collection details, see Type material above.)

Diagnosis.— Habitus slender, ovoid. Elytra 1.2-1.3 times as long as their combined width (length measured from the caudal tip of the scutellum to the elytral apices). Aedeagus ( figs 24-25 ) short and wide, with two elongated apical lateral ‘wings’ and a short terminal processus. Antennae short, as long as the width of the head. Female elytral apices drawn out. Male with a central extension on the 4 th visible abdominal sternite.

Description.— Habitus slender, ovoid. Moderately pigmented: mostly chestnut brown; only the legs, the elytral apices, the tips and the bases of the antennae lighter brown. Length 2.3-3.0 mm (n = 8). Antennae short and condensed, as long as the width of the head (n = 4). Articles 6 distinctly, 9 and 10 slightly wider than long. Male protarsi only slightly dilated: the protibia at its largest width (excluding the lateral spines) is 2.5 times broader than 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 1.68-1.86 times as wide as long (n = 4), the caudal corners slightly drawn out. The mesosternal carina is strongly developed, its edge somewhat thickened. Elytra relatively slender, 1.23-1.30 times as long (measured from the caudal tip of the scutellum) as their combined width (n = 4). Elytral apices rounded (not truncated) in the male ( fig. 30 ), and drawn out in the female ( fig. 29 ). The 4 th visible abdominal sternite in the male with a central point at its caudal edge; the 6 th with a broad and relatively distinct central notch. Aedeagus ( figs 24-25 ) 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, except for the apical quarter, which is bent ventrad under a distinct angle. Male genital segment relatively broad, at the apex slightly triangular, 2.5 times as long as wide.

Distribution.— This species has been found only in lower montane forest on Mount Kinabalu and in the Crocker Range.

Remarks.— Based on aedeagal shape, P. kinabaluensis is closely related to P. bryantioides , from which it differs strongly in the habitus, which is much more slender in P. kinabaluensis . Also, P. kinabaluensis has distinctive secondary sexual characteristics: the only slightly dilated male protarsi, the drawn-out elytral apices in the female ( fig. 29 ), and the absence of long hairs on the male forelegs.

Etymology.— kinabaluensis , a Latin adjective, meaning ‘from Kinabalu’. The name refers to the type locality.

Figures

Figs 16-25. 16, Ptomaphaginus anas spec. nov. holotype; aedeagus, dorsal view. 17, Ptomaphaginus anas spec. nov., holotype; aedeagus, lateral view. 18, Ptomaphaginus similipes spec. nov., holotype; aedeagus, dorsal view. 19, Ptomaphaginus similipes spec. nov., holotype; aedeagus, lateral view. 20, Ptomaphaginus bryantioides spec. nov., paratype (from Kiansom); aedeagus, dorsal view. 21, Ptomaphaginus bryantioides spec. nov., paratype (from Kiansom); aedeagus, lateral view (basal part partly obscured by the genital segment). 22, Ptomaphaginus latimanus spec. nov., holotype; aedeagus, ventral view. 23, Ptomaphaginus latimanus spec. nov., holotype; aedeagus, lateral view. 24, Ptomaphaginus kinabaluensis spec. nov., holotype; aedeagus, dorsal view. 25, Ptomaphaginus kinabaluensis spec. nov., holotype; aedeagus, lateral view.

Figs 26-30. 26, Ptomaphaginus caroli spec. nov., holotype; habitus, dorsal view. 27, Ptomaphaginus similipes spec. nov., female paratype (from Crocker Range); protarsus. 28, Ptomaphaginus similipes spec. nov., male paratype (from Trus Madi); protarsus. 29, Ptomaphaginus kinabaluensis spec. nov., female paratype (from Gunung Kinabalu); elytral apices. 30, Ptomaphaginus kinabaluensis spec. nov., holotype; elytral apices.