A review of the Cholevinae from the island of Borneo (Coleoptera, Leiodidae) Schilthuizen, Menno Perreau, Michel Njunjic, Iva ZooKeys 2018 777 57 108 http://zoobank.org/87C3F9D7-6CBD-4351-B96F-307A65F0716D Schilthuizen, Njunjic & Perreau Insecta Leiodidae Ptomaphaginus CoL Animalia Ptomaphaginus isabellarossellini Coleoptera 11 68 Arthropoda species isabellarossellini   Material. Holotype: Malaysia, Sabah, Mt. Kinabalu National Park, Bukit Ular Trail (low), 1800 m elev., multistratum evergreen forest, 2 fish traps, 07-11.xi.1987 (leg. Krikken & Rombaut, RMNH.INS.1086160), male. Paratypes: Sabah. Mt. Kinabalu National Park, Bukit Ular Trail (low), 1800 m elev., multistratum evergreen for est, 2 fish traps, 07-11.xi.1987 (leg. Krikken & Rombaut, RMNH.INS.1086161-1086164), 4 females.  Description. Large (3.3-4.0 mm), winged. Elytra, legs and basis and tip of the antennae dark reddish brown, pronotum, head and antennomeres 5-10 nearly black. Pronotum 1.6 times as wide as long, caudal angles clearly extended, as wide as the elytra at the shoulders. Elytra slender, slightly convex, 1.5 times as long as wide (length measured from the caudal tip of the scutellum to the apex of the elytra). Elytral apex in the female gradually rounded and joining the suture at a right angle; in the male more acute, meeting the suture at a sharp angle, and with a distinct bunch of thick, black, outwardly-curved, spine-like setae. Wings present. Body otherwise covered with dense light grey setation. Male tarsi strongly dilated, tarsomeres 1-4 jointly twice as long as wide. Female tarsi not dilated. Aedeagus very strongly curved ventrad, very convex, with a distinct dorsal keel; apex trilobate; stylet very long and thin, hair-like. Spermatheca semicircular, spermiduct extremely long (in extended condition probably at least 5 mm), consisting of ca. 30 360° loops.  Differential diagnosis. Among Sabah Ptomaphaginus, and more generally, very distinctive by its large size, dark colouration (but see below under Remarks), the spine-like setae on the male elytral apex, and the uniquely shaped aedeagus (the basic design of which, with two lateral flaps at the apex, resembles that of the P. bryantigroup, as well as non-Bornean species like P. sinuatusSchilthuizen, 1984). The conspicuous bunch of spines at the elytral apex in the male is shared with three other non-Bornean species, viz. P. riedeliPerreau, 1995, P. pilipennisPerreau, 1991 and P. pilipennoidesPerreau, 1991, which, however, differ strongly from P. isabellarosselliniin aedeagal shape. In other Bornean species, P. bryantioidesand P. similipes, stronger setae at the male elytral apex can also be discerned, but never as conspicuous as in P. isabellarossellini.   Habitatand distribution. Only known from the lower montane forest around Kinabalu Park Headquarters.  Remarks. It should be noted that specimens of the normally rusty-coloured P. scaphanerSzymczakowski, 1972 from the same collection sample as P. isabellarosselliniare also nearly black. This may mean that the dark colouration of P. isabellarosselliniis a preservation artefact.  Etymology. Named in honour of the actress and biologist Isabella Rossellini, whose short movies and stage performances on animal reproduction have popularized theories on the evolution of genitalia. In P. isabellarossellini, the extremely long penis stylet in the male and similarly long spermiduct in the female suggest a long history of sexually antagonistic coevolution, one of the types of selection that appears in Rossellini's'Green Porno'series on SundanceTV ( Schilthuizen 2014).  Figure 7. Ptomaphaginus, aedeagus, dorsal (left) and lateral (right) view. a, b P. isabellarossellinisp. n. Gunung Kinabalu, holotype (RMNH.INS.1086160) c, d P. scaphanerSzymczakowski, Gunung Mulu (NHMUK) e, f P. muluensissp. n. Gunung Mulu, paratype (NHMUK) g, h P. burckhardtiSchilthuizen & Perreau, Gunung Kinabalu, holotype (MHNG) i, j P. sabahensisSchilthuizen & Perreau, Gunung Kinabalu, holotype (MHNG).  Figure 8. Ptomaphaginus caroli, aedeagus, Crocker Range, holotype (RMNH). a dorsal view b lateral view (after Schilthuizen & Perreau, 2008). Scale line absent as the drawing is based on a rough sketch made before the aedeagus of the holotype was lost; see text.