Ptomaphaginus bryantioides, 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 : 192-193

Ptomaphaginus bryantioides spec. nov.

( figs 20-21 ).

Type material.— Holotype ♂: Malaysia: Sabah: Danum Valley Field Centre (60 km WSW of Lahad Datu), 5 º00’N 117º50’E, 15.v.2000, pitfall with chicken, leg. J. de Roode ( BOR) . Paratypes, same collection data as holotype: 2 ♂♂, 9 ♀♀ (in BOR) ; same locality as holotype, 22-27.ix.2000, pitfall with human dung, leg. M. Schilthuizen: 2 ♂♂ 1 ♀ ( BOR) ; Malaysia: Sabah: Kiansom (20 km ESE of Kota Kinabalu), 27.ii.1997, flight interception trap, leg. UMS students: 2 ♂♂, 1 ♀ ( BOR) ; same locality, 11.iv.2000, pitfall with chicken, leg. M. Schilthuizen, 1 ♂♂, 1 ♀ ( BOR) ; Malaysia: Sabah: Tun Fuad Stephen Municipal Park (outskirts of Kota Kinabalu ), 10-12.iv.2000, pitfall with lamb, leg. M. Schilthuizen, 2 ♂♂, 5♀♀ ( BOR) , 1 ♂ ( FRCS) ; same locality, 24-27.xi.2000, pitfall with dung or beef, leg. M. Schilthuizen, 1 ♂, 3 ♀♀ ( BOR) ; Sugud Forest Reserve , 15 km S of Kota Kinabalu (Sabah), 200 m alt., pitfall with carrion, leg. M. Schilthuizen, 1 ♀ ( BOR) ; Malaysia: Sabah: Batu Punggul Resort , 24.vi-1.vii.1996, flight interception trap, 13 ♂♂, 7 ♀♀ ( CJRZ; CMPR) .

Additional material (not included in the type series).— Tun Fuad Stephen Municipal Park, 24-27.ix.2000, 4 ♂♂, 9 ♀♀ in 70% ethanol; Kiansom, 25-29.xii.2000, 8 specimens of unidentified sex in 70% ethanol; Kiansom, 27.ii.1997, 2 specimens of unidentified sex in 100% ethanol; Danum Valley Field Centre, 15.v.2000, 2 specimens of unidentified sex in 100% ethanol. (For full collection details, see Type material above.)

Diagnosis.— Habitus broad, rectangular, flat. Thorax on average 1.8 times as wide as long. Aedeagus ( figs 20-21 ) with two apical lateral ‘wings’ and a long terminal processus. Male forelegs with long hairs on the ventral side of the profemur and protibia.

Description.— Habitus broad and rectangular, relatively flat. Moderately pigment- ed: mostly chestnut brown; only the tarsi and the edges of thorax and elytra lighter brown. Length 2.1-2.9 mm (n = 26). Antennae slender and relatively long, 1.1-1.2 times as long as the width of the head (n = 5). Articles 6, 9, and 10 square. Male protarsi moderately dilated: the protibia at its largest width (excluding the lateral spines) is 1.5 times broader than the first article of the protarsus (n = 1). Female protarsi undilated. In the male, the ventral side of profemur and protibia carry long hairs, some of which are as long as the tarsus. Thorax 1.76-1.84 times as wide as long (n = 5), relatively flat, with the caudal corners distinctly drawn out. The mesosternal carina is strongly developed, its edge somewhat thickened. Elytra short, as long (measured from the caudal tip of the scutellum) as their combined width. Elytral apices distinctly truncate, identical in both sexes. The 3 rd- 5 th visible abdominal sternite in the male each have a broad and very indistinct central notch and are slightly depressed in the vicinity of these notches. Aedeagus ( figs 20-21 ) in dorsal view abruptly narrowing towards the apex, and there adorned with two lateral ‘wings’. The tip is composed of a long, fragile and slightly asymmetric processus. In lateral view, the aedeagus is moderately curved, the terminal processus lies in the plane of the rest of the aedeagus, whereas the two lateral wings point ventrad. Male genital segment relatively broad, at the apex slightly triangular, 2.5 times as long as wide.

Distribution.— This species is widely distributed in the lowlands of Sabah (all localities lie below 300 m altitude), and apparently has a broad tolerance for habitat types, having been found both in primary (Danum Valley) and in secondary forests (Tun Fuad Stephen Park, Kota Kinabalu).

Remarks.— Based on aedeagal shape, P. bryantioides is closely related to P. bryanti , from which it differs in the habitus, which is very broad and stocky in P. bryantioides . For example, the thoracal index for the new species is 1.76-1.84, whereas for the holotype of P. bryanti it is only 1.56.

Etymology.— bryantioides , a Latin adjective, meaning ‘like bryanti ’. The name refers to the similarity in aedeagal shape between these two species.

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.