Pseudolathra lanceolata, Rougemont & Ox & Pw, 2014

Rougemont, Guillaume de, 2014, Two new species of Pseudolathra Casey from Borneo (Coleoptera, Staphylinidae, Paederinae), Revue suisse de Zoologie 121 (3), pp. 395-399 : 397-399

Pseudolathra lanceolata n. sp. Figs 2, 2a-c

HOLOTYPE ( OUMNH): ♂ MALAYSIA: Sabah, Lahad Datu, Ulu Segama For. Res., Danum Valley Forest Centre, 04º57.9’N 117º48.1’E, 200 m alt., XI.2005, 1º Forest FIT, coll. Slade & Villanueva) OUMNH-2006-051 .

PARATYPES: 1 ♂ & 3 ♀♀, ibid. (1 paratype each in OUMNH, RCL and MHNG) . – 1 ♀, MALAYSIA, Borneo, Sabah, Ulu Segama Forest Reserve, Ulu Segama Forest Reserve , Danum Valley Forest Reserve , Danum Valley Conservation Area , ca. 10 km from Danum Valley F.C., Borneo Rainforest Lodge area Plot 3. 12.III.2004, 05º02.68’N 117º45.55’E, Leg. E. Slade + J. Villanueva, OUMNH-2005-062 , E. Slade colln., Oxford University Museum of Natural History ( OUMNH) (in OUMNH) . – 1 ♀, MALAYSIA, Borneo, Sabah, Ulu Segama Forest Reserve, Danum Valley Conservation area , ca. 21 km from Danum Valley F.C., near Malua Biodiversity Exp. , 30.III.2005, F.I.Trap, secondary forest ca. 05º73’N 117º37.61’E, Malua Plot 1, Leg. E. Slade + J. Villanueva, OUMNH-2005-062 , E. Slade colln. Oxford University Museum of Natural History ( OUMNH) (in OUMNH) . – 1 ♂, MALAYSIA, Sabah, Lahad Datu, Ulu Segama For Res, Coupe 81 logging area, 04º58.660’N 117º53.410’E, iii.2005 FIT 2º Forest, coll. E. Slade + J. Villanueva (in RCL) . – 1 ♂ & 1 ex. (abdomen missing), SABAH, Danum Valley , B . R.L. f.i.t., 14-16.II.2007, G. de Rougemont (in RCL) .

TAXONOMY: This new species also appears to belong to the nigerrima group according to its colour, size and puncturation, but has an aberrant type of aedoeagus.

DESCRIPTION

Length of body: 7-7.6 mm; length of fore-body: 3.8 mm.

Body entirely black; palpi, antennae and tarsi dark testaceous; femora and tibiae infuscate, the femora more strongly so.

Habitus (fore-body): Fig. 2. Head transverse, 4/5ths wider than long; vertex shiny, with 3-4 large setiferous punctures near inner anterior margin of eyes, another on margin of eye posteriorly, another behind eye, and a continuous row of small punctures along basal margin. Eyes very large, more than twice as long as temples measured from posterior margin of eye to posterior angles of head. Antennae about 2.4 mm long.

Pronotum scarcely elongate, 4/5ths longer and about as broad as head, with a discal series of 5 large punctures, an outer series of 3 punctures slightly divergent posteriorly to inner series, 3 punctures near lateral margin in anterior half of pronotum, besides a few small punctures on lateral margin itself. Elytra longer and broader than pronotum, with a juxta-sutural series of 8-10 small punctures, an inner discal series of 8-10 larger punctures, an outer series of 9-10 punctures, and a series of 7-8 punctures on lateral declivity of elytra. Hind wings fully developed. Abdomen much narrower than elytra, shiny, sparsely punctate.

Male: abdominal sternite VII (Fig. 2b) with a fairly large broad apical emargination, its lateral angles salient and furnished apically with a number of small black bristles; sternite VIII (Fig. 2c) with a deep, narrow sub-parallel-sided emargination extending to half the length of sternite; aedoeagus (Fig. 2a) with a long lanceolate dorsal blade of the median lobe, the ventral blade short, bi-lobed.

Pseudolathra borneensis (1) fore-body. (1a) Aedoeagus in ventral view. (1b) Male sternite VII. (1c) Male sternite VIII. Pseudolathra lanceolata (2) fore-body. (2a) Aedoeagus in ventral view. (2b) Male sternite VII. (2c) Male sternite VIII. (3) Pseudolathra . species indet. cf. lanceolata , aedoeagus in ventral view. Scale bars: 1 mm, except 1a = 0.1 mm.

REMARKS: This new species superficially most closely resembles P. nigerrima , but is on average a little smaller, of the same colour but with darker legs, and differs morever in its more transverse head, the puncturation of the pronotum, and the completely different aedoeagus.