Ptomaphaminus sarawacensis Schilthuizen & Perreau

Schilthuizen, Menno, Perreau, Michel & Njunjic, Iva, 2018, A review of the Cholevinae from the island of Borneo (Coleoptera, Leiodidae), ZooKeys 777, pp. 57-108 : 89

Ptomaphaminus sarawacensis Schilthuizen & Perreau sp. n. Figures 11b, 12i, j, 13g, h, 14c

Material.

Holotype: Malaysia, Sarawak, 4th Division, Gunung Mulu National Park, Slope, 4.5.78, 9.1, 9.3, v–viii.1978 (leg. P.M. Hammond & J.E. Marshall, in NHMUK, B.M.1978-49), 1 male. Paratypes: Sarawak. Gunung Mulu National Park, Slope, 4.5.78, 9.1, 9.3, v–viii.1978 (leg. P.M. Hammond & J.E. Marshall, NHMUK, B.M.1978-49), 5 males, 12 females.

Description.

Length: 1.90-2.35 mm. General colour brown; the tarsi and two first antennomeres yellowish. Winged. Eyes well developed. Pronotum 1.6 times as wide as long. Elytra 1.4 times as long as wide. Sutural angle of female elytra angular (Figure 14c). Apex of the spiculum gastrale of the male genital segment dilated into a paddle-like shape (Figure 13g). Aedeagus approximately four times shorter than the body length. Median lobe parallel-sided in the first half, then regularly narrowed from the middle of its length, with a preapical constriction in dorsal view (Figure 12j), obtusely angular ventrally after the middle, with a long apical ventrally deflexed but not retroverted hook in lateral view (Figure 12i). Six lateroventral preapical setae and one lateroapical seta on each sides. Internal stylus of the endophallus nearly straight. Female genital segment with reduced gonocoxites. Spermiduct membranous, vaguely helical at least near the base of the spermatheca. Apex of the spermatheca rounded, without apical sclerotised plate (Figure 13h).

Differential diagnosis.

See under P. hanskii (above).

Habitat and distribution.

Known from lowland forests of Gunung Mulu, Sarawak, Malaysia.

Remarks.

Extremely similar to P. hanskii , except in aedeagus shape.

Etymology.

Named for the Malaysian state of Sarawak, where the type locality lies.