Eleusis rufipennis, Irmler, 2017

Irmler, Ulrich, 2017, The Neotropical species of the genus Eleusis LAPORTE, 1835 with description of the new genus Eleusima (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 67 (2), pp. 275-318 : 288-289

Eleusis rufipennis spec. nov.

urn:lsid:zoobank.org:act:B6989833-5DD4-492E-969F-DD1F4E6E97E9

Figs 13 A-C, 29E

Type material: male, Holotype: Costa Rica: Heredia, Volcán Brava , 2800 m elev., flight intercept trap, 11.- 27.6.1997, leg. S. & J. Peck , # CR1P97020. Paratype: Cartago, 4 km NE Canon, Genesis II Cerro de la Muerte, 2350 m elev., malaise trap, female, 1.4.- 30.5.1996, leg. P. Hanson , # CR1H95-96 14 ( KNHM); Heredia, Cerro Chompipe , 10 km NNE Heredia, 2100 m elev., flight intercept trap, male, 12.- 27.6.1997, leg. S. & J. Peck ,

#CR1P97021 ( UIC).

Diagnosis: The species mostly resembles E. genieri in size and colouration. It is mainly differentiated from that species by the shape of the aedeagus. More details for the differentiation are given in the diagnosis for E. genieri .

Description: Length: 3.4 mm. Colouration: black, elytra light reddish brown; along suture blackish, blackish spot largely widened at scutellum and shortly widened at posterior margin; legs light brown; antennae light brown at base, darkened to apex.

Head 0.54 mm long, 0.59 mm wide; eyes prominent; temples nearly twice as long as eyes; parallel; posterior angles shortly rounded to distinct neck; preocular sides shortly parallel to base of antennae; anterior margin of clypeus sinuate; central part prominent; supraocular groove deep; from anterior edge of eyes to posterior edge of temples; between eyes on anterior vertex with pair of impressions; with setiferous puncture; punctation deep and moderately sparse; on average, interstices between three to four times as wide as diameter of punctures; between larger punctures with sparse micro-punctation; elongate microsculpture deep and dense; on clypeus partly diagonally striate; on vertex longitudinally striate; surface moderately matt.

Antennae slightly longer than head and half of pronotum combined; first antennomere elongate; second antennomere one third as long as first; third antennomere slightly longer than second; following antennomeres increasing in width and decreasing in length; fourth antennomere slightly longer than wide; tenth antennomere slightly wider than long; antennomeres four to eleven pubescent and with long apical setae.

Pronotum 0.46 mm long, 0.55 mm wide; widest close to anterior angles; anterior angles widely rounded; continuously narrowed posteriad to obtuse posterior angles; posterior margin only half as wide as at anterior angles; sides interrupted at middle; interruption marked by setiferous punctures; more setiferous punctures at anterior margin close to anterior angles and in anterior half along lateral margin; punctation similarly deep and dense as on head; narrow midline impunctate; with pair of weak longitudinal impressions on each side of midline; elongate microsculpture dense and deep; on disc, longitudinally striate; at central anterior margin, transversely striate; in lateral anterior half, partly diagonally striate; surface moderately matt.

Elytra 0.81 mm long, 0.74 mm wide; widest close to posterior angles; slightly convergent to humeral angles; humeral angles and posterior angles nearly rectangular; punctation similarly dense as on pronotum, but slightly weaker; one central larger setiferous puncture on each side of suture; elongate microsculpture dense; weaker than on pronotum; surface moderately shiny.

Abdomen deeply and densely punctate; with transverse row of setiferous punctures on each segment; deep elongate microsculpture diagonally striate; at lateral base of segments netlike striate.

Aedeagus thick; in lateral aspect, strongly curved with shortly rounded, nearly acute apex; in ventral aspect, parallel with broad straight apex; at central midline with prominence; along midline and at prominence with numerous sensillae; few sensillae close to lateral apical angles; paramere thick with long transparent lobe; apical margin of transparent lobe irregularly lobed.

Etymology: The species name is a combination of the Latin words rufus meaning red and pennis meaning elytra and refers to the reddish colouration of the elytra.

Figures

Fig. 13–17: Eleusis rufipennis (13); E. ecuadoriensis (14), Eleusis breviceps (15), E. insignis (16), E. scita (17); aedeagus in lateral (A)