Espeson microphthalmus FAUVEL , 1902: 36, Fauvel, 1902

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: 342-343

publication ID 10.21248/contrib.entomol.62.2.331-360


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Espeson microphthalmus FAUVEL , 1902: 36


Espeson microphthalmus FAUVEL, 1902: 36   ( Figs 5a,b View Figs 3-5 , 16E View Fig )

Type material examined:

French Guyana: 1 female, without further data (holotype, IRSNB)  


Compared to the other yellow species, E. microphthalmus   can be differentiated by the overall parallel shape of the body that resembles a species of the genus Pseudespeson   ; but abdominal segment III is slightly narrowed and tergite VIII is without central spine. The pronotal emargination is deep and its sides are nearly parallel with a distinct lateral margin, whereas they are concave in the other yellow Espeson species   and lateral margins are absent or extremely narrow. A dorsal impression is absent as in E. adisi   , but in E. adisi   the shape of the pronotal emargination is concave and abdominal segment III and IV are narrowed at base. Unfortunately, only the type female is known.


Length: 1.9 mm. Colour: yellow, antennae and legs lighter yellow.

Head: 0.25 mm long, 0.30 mm wide; eyes as large as temples; temples smoothly rounded; punctation dense and deep; distance between punctures half as wide as diameter of punctures; without microsculpture; surface polished.

Antennae shorter than head and pronotum combined; 2 nd globular, 3 rd conical, both antennomeres equal in length; following 3 antennomeres at least slightly wider than long and not wider than preceding antennomeres; antennomeres 7 to 11 distinctly wider than preceding ones and distinctly wider than long; 8 th antennomere slightly smaller than preceding and following antennomere and three times wider than long; penultimate antennomeres twice as wide as long.

Pronotum: 0.28 mm long, 0.38 mm wide; distinctly emarginate in front of posterior edge; with deep impression in the emargination; widest in the middle and slightly narrowed to the anterior angles; deeply and densely punctate on the disc, punctation partly coriaceous; without microsculpture; surface polished.

Elytra: 0.45 mm long, 0.43 mm wide; punctation irregularly dense; distance between punctures as wide as or smaller than diameter of punctures; without microsculpture; surface polished.

Abdomen with similar punctation as on elytra and weak microsculpture; surface shiny, but less shiny than elytra; tergite of last abdominal segment rounded.


Institut Royal des Sciences Naturelles de Belgique














Espeson microphthalmus FAUVEL , 1902: 36

Irmler, U. 2012

Espeson microphthalmus FAUVEL , 1902: 36

Fauvel, A. 1902: 36