Espeson crassulus Fauvel, 1902: 35

Irmler, U., 2012, The Neotropical species of the genera Pseudespeson L, 1994 and Espeson S, 1882 (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 62 (2), pp. 331-360 : 334-335

Espeson crassulus Fauvel, 1902: 35

Type material examined:

Guadeloupe: Trois Rivieres , 1 male, 3 females, detritus vegeteaux, without further data ( IRSNB, all syntypes) .

Additional material examined:

Guadeloupe: 1 female without further data ( NHMW) ; St. Vincent: Leeward side, 1 male, 1 female without further data, leg. H. H. Smith ( NHMW) ; St. Thomas : 1 male without further data ( NHMW) .

Diagnosis:

The species is larger than P. nitens and eyes are remarkably smaller. Eyes are only 0.25 times longer than temples, while they are tree times longer than temples in P. nitens . Additionally, punctation on pronotum and elytra is denser and coarser than in P. nitens .

Description:

Length: 2.4 mm. Colour: dark yellow, antennae and legs lighter yellow.

Head: 0.30 mm wide, 0.48 mm long; eyes 0.25 times longer than temples; temples smoothly rounded; disc coarsely and densely punctate; distance between punctures 0.5 times as wide as diameter of punctures; on clypeus punctation slightly sparser; surface shiny, with weak longitudinally reticulate microsculpture.

Antennae with 2 nd and 3 rd antennomere equal in length; 4 th antennomere quadrate; the following ones wider than long and increasing in width; 8 th antennomere less wide than 7 th and 9 th antennomere and distinctly shorter.

Pronotum: 0.30 mm long, 0.48 mm wide; distinctly emarginate in front of posterior edge; only half as wide as at anterior edge; coarsely and densely punctate; still coarser and denser punctate than on head; distance between punctures on average 0.25 times as wide as diameter of punctures; surface shiny, with weak irregular microsculpture.

Elytra: 0.50 mm long, 0.53 mm wide; with dense and deep punctation; distance between punctures similar as on pronotum; surface shiny, with weak irregular microsculpture; microsculpture slightly denser than on pronotum.

Abdomen with finer and sparser punctation than on elytra and microsculpture more distinct; thus, surface less shiny than elytra; laterally with long dark setae, tergite of last abdominal segment with distinct central tooth.