Eleusis andina, 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 : 279

Eleusis andina spec. nov.

urn:lsid:zoobank.org:act:23436043-BE8A-46AE-97E5-15BDAEECF02A

Figs 6 A-C, 28B

Type material: male, Holotype: Peru : Tambopata Prov. , Madre de Dios Dept., 15 km NE Puerto Maldonado, Reserva Cuzco Amazónico (12°33'S, 69°03'W), Plot Z 1E 7, 200 m elev., under bark, 9.7.1989, leg. J.S. Ashe & R.A. Leschen ( KNHM) ; PARATYPE: Guatemala : Zapote , 4 males, 6 females, leg. Champion (9 BMNH, 1 UIC); Peru: Junín Dept., La Merced-Villa Rica Rd. (10°58.42'S, 75°18.18'W), 880 m elev., flight intercept trap, female, 15.- 21.10.1999, leg. R. Brooks, # PERU 1N99 ( KNHM) .

Diagnosis: Without dissection of the aedeagus, the species cannot be separated from the extreme similar E. humilis . In contrast to E. humilis , the male of E. andina has a larger head. The infraspecific variation is unknown. However, the characteristic lateral lobes at the apex of the aedeagus and the extremely widened parameres separates it from the related species of the E. humilis-group.

Description: Length: 3.0 mm. Colouration: dark brown; elytra light brown with posterior margin blackish; legs and antennae light brown to yellow.

Head: 0.44 mm long, 0.46 mm wide; eyes not prominent; slightly shorter than temples; temples behind eyes parallel; smoothly narrowed to wide neck; preocular sides parallel to base of antennae; anterior margin of clypeus sinuate to smoothly rounded apex; supraocular groove deep; parallel to side; punctation weak and irregularly sparse; interstices between punctures twice to eight times as wide as diameter of punctures; at each end of supraocular groove with setiferous puncture; long setae yellow; microsculpture moderately weak; on clypeus and vertex, meshes of microsculpture longitudinal; near neck transverse; surface moderately shiny.

Antennae slightly shorter than head and pronotum combined; first antennomere thicker and longer than following antennomeres; second antennomere half as long as and as wide as first; third antennomere slightly longer and wider 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 apical setae.

Pronotum: 0.37 mm long; 0.47 mm wide; widest at anterior angles; evenly narrowed to posterior angles; at posterior angles only half as wide as at anterior angles; anterior angles smoothly rounded to anterior margin; at anterior margin close to anterior angles with three large setiferous punctures, long setae yellow; along lateral margin several setiferous punctures; lateral margin interrupted; interruption marked by setiferous puncture, punctation as deep and sparse as on head; microsculpture as weak as on head; meshes elongate; partly diagonal or circular at anterior angles; surface moderately shiny.

Elytra: 0.50 mm long, 0.48 mm wide; widest close to posterior margin; humeral angles smoothly rounded; punctation weaker, but denser than on head and pronotum; one large setiferous puncture on central disc; laterally, more setiferous punctures; microsculpture still weaker than on head and pronotum; partly invisible; meshes longitudinal; surface shinier than that of pronotum.

Abdomen with transverse weak microsculpture; irregular, dense punctation with differently long yellow setae.

Aedeagus broad; in apical half with wide lateral lobes; apex widely rounded; at midline with nearly semicircular process; few sensillae near apex; on process and basely with few more sensillae; parameres nearly as long as central lobe; with broad, nearly rectangular transparent lobe; on transparent lobe one long seta and numerous shorter setae; few sensillae at base of transparent lobe and at base of paramere.

Etymology: The species name derived from the region where the holotype was found: the foots of the eastern Andes.

Figures

Fig. 2–6: Eleusis interrupta (2), E.humilis (3), E. nigerrima (4), E. boliviana (5), E. andina (6); aedeagus in lateral (A) and ventral (B)