Ptomaphaginus similipes Schilthuizen & Perreau, 2008

Schilthuizen, Menno, Perreau, Michel & Njunjic, Iva, 2018, A review of the Cholevinae from the island of Borneo (Coleoptera, Leiodidae), ZooKeys 777, pp. 57-108 : 75-78

Ptomaphaginus similipes Schilthuizen & Perreau, 2008 Figures 5d, 6e, f, 9l

Ptomaphaginus similipes Schilthuizen & Perreau, 2008: 193-194, figs 18-19, 27-28; type from Crocker Range Park, Sabah, Borneo (in RMNH).

Material.

(In addition to that given in Schilthuizen and Perreau (2008)): Sabah. Kinabalu Park, Sayap substation, 950 m elev., 11-16.ix.2012 (leg. M. Schilthuizen, Crocker Range / Kinabalu Expedition, RMNH.INS.555608-555610, 555612-555614, 555616 -555617), 8 individuals; Kinabalu Park, Headquarters Area, Liwagu Trail, 6°00'29.2"N 116°32'43.8"E, pitfall with chicken, 2.iv.2016 (leg. M. Schilthuizen, I. Njunjić & F. Feijen, RMNH.INS.1086234 and BORN), 3 males; Crocker Range, Sugud Forest Reserve, 5°50.361'N, 116°07.084'E, 360 m elev., 1-4.ix.2012 (leg. M. Schilthuizen, Crocker Range / Kinabalu Expedition, RMNH.INS.555592, 555593, 555595), 3 individuals; Crocker Range, Sugud Forest Reserve, 5°50.361'N, 116°07.084'E, 360 m elev., 25.xii.2009 - 01.i.2010 (leg. M. Schilthuizen, RMNH.INS.555678-555685, RMNH.INS.63287-63288, RMNH.INS.549296-549299 and BORN), 14 individuals; Crocker Range, Sugud Forest Reserve, 5°50.361'N, 116°07.084'E, 360 m elev., 10-15.iv.2011 (leg. M. Schilthuizen, RMNH.INS.549263), 1 individual; Crocker Range, Kota Kinabalu-Tambunan road (km 56), 1350 m elev., fish and human excrement traps, 21-24.xi.1987 (leg. Krikken & Rombaut, RMNH.INS.1086239-1086252), 10 males, 8 females; Crocker Range, Keningau-Kimanis road, km 25, 1300 m elev., human excrement traps, 18-23.xi.1987 (leg. Krikken & Rombaut, RMNH.INS.1086235-1086238), 4 individuals. Sarawak. Mulu National Park, mixed dipterocarp forest litter, TPS 1-2, v–viii.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 3 males, 5 females; Mulu National Park, mixed dipterocarp forest litter, TPS 5-6, v–viii.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 6 males, 8 females; Mulu National Park, mixed dipterocarp forest litter, TPS 7-10, v–viii.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 4 males, 1 female; Mulu National Park, slope, TPS 4-6, 29.iv.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 2 males; Mulu National Park, slope, TPS 7-9, 29.iv.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 2 males, 2 females; Mulu National Park, slope, TPS 10-12, v–viii.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 2 females; Mulu National Park, slope, TPS 13-16, 29.iv.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 4 males, 3 females; Mulu National Park, slope, TPS 17-21, 29.iv.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 2 males; Mulu National Park, slope, baited traps, 7.iv.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 1 female; Mulu National Park, camp 2, ca. 500 m elev., v–viii.1978 (leg. P.M. Hammond & J.E. Marshall, B.M. 1978-49, NHMUK), 1 female.

Description.

Length 2.4-3.0 mm. Pronotum 1.69-1.80 times as wide as long, as wide as the elytra. Elytra 1.19-1.23 times as long as wide (length measured from the caudal tip of the scutellum to the apex of the elytra). Wings present. Aedeagus short and broad, with two short apical, laterally directed ‘wings’ and a short terminal processus. Male forelegs usually with long setae on the ventral side of the femur and tibia. Male protarsus completely not dilated, of the same width as in the female. The 3rd, 4th, and 5th visible abdominal ventrite of the male carry a slight central notch and show a depression around these notches. Spermatheca narrow, V-shaped, with ca. 10 indistinct rings. Spermiduct long and thin, consisting of ca. 6 360° loops.

Differential diagnosis.

Among other members of the P. bryanti complex, distinguished by the not dilated male protarsi, thin, annulated spermatheca, the relatively small size, and the short and squat aedeagus.

DNA barcodes.

COI barcodes are available for the following specimens: RMNH.INS.63287 (Sugud), RMNH.INS.549263 (Sugud), RMNH.INS.555592-555593 (Sugud), RMNH.INS.555680-555681 (Sugud), RMNH.INS.555685 (Sugud), RMNH.INS.555609-555610 (Sayap), RMNH.INS.555612 (Sayap), RMNH.INS.555616 (Sayap). For RMNH.INS.63288, only the 3' section of COI is available. For the specimens RMNH.INS.549296-549299 there are entries in BOLD, but we have not yet been able to extract amplifiable DNA from these.

Habitat and distribution.

Appears to be widespread on the west coast of Sabah and Sarawak, at elevations between 350 and 1400 m. Some deep molecular divergences are apparent: the specimens collected at Sayap fall in a different DNA barcode BIN than the ones from Sugud (BOLDBINsACK0140 and ACK0141+ABV4636).

Remarks.

The male protarsi were slightly dilated in the one male from the Kinabalu Headquarters area.