Holotrochus pseudoleticiae, Irmler, 2013

Irmler, Ulrich, 2013, New species of the genus Mimogonia and Holotrochus from South America (Coleoptera: Staphylindae: Osoriinae), Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 155-176 : 174-175

Holotrochus pseudoleticiae sp. nov.

( Figs 15 , 19B )

Type locality. Peru, Departamento Loreto, San Jacinto .

Type material. HOLOTYPE:, Peru, Dept. Loreto, Campamento San Jacinto (75°51.77’W, 2°18.75’S), 175–215 m, flower fall berlese, 2. July 1993, leg. R. Leschen ( KSEM) . PARATYPE:, Peru, Dept. Loreto, Campamento San Jacinto (75°51.77’W, 2°18.75’S), 175–215 m, rainforest berlese, 6. July 1993, leg. R. Leschen ( UIC) .

Diagnosis. This species belongs to the H. syntheticus group due to the pubescent abdomen. It resembles H. leticiae Irmler, 1987 by the large prominent eyes and the clavate antennae. H. pseudoleticiae sp. nov. is distinctly larger than H. leticiae . The parameres of H. leticiae are straight; whereas they are sinuate in H. pseudoleticiae sp. nov. The endophallus of both species is tube-like and nearly without coils.

Description. Length: 3.8 mm. Colouration black; very narrow posterior margin of pronotum lighter brown; legs and antennae yellow.

Head 0.51 mm long, 0.85 mm wide; eyes very large and prominent; at least two times longer than temples; fore-head semicircular; punctation fine and sparse; on average, interstices between punctures at least two times as wide as diameter of punctures; few setiferous punctures on clypeus; four setiferous punctures on vertex placed in quadrate; few setiferous punctures on supraocular area; remains of isodiametric microsculpture; surface polished and shiny.

Antennae as long as head and half of pronotum combined; second antennomere oblong and slightly shorter than conical third; following antennomeres extremely increasing in width and covered by numerous short and long setae; apical antennomere 2.5 times wider than fourth; fourth antennomere quadrate; nearly two times as wide as long.

Pronotum 0.55 mm long, 0.91 mm wide; widest in middle; slightly and evenly narrowed to posterior angles; more strongly narrowed in smooth curve to anterior angles; posterior angles nearly rectangular; lateral margin distinct; in dorsal aspect, visible throughout its total length; combined with anterior margin; punctation moderately sparse and deep; punctures of different size; on average, interstices between punctures at least two times as wide as diameter of punctures; along anterior margin with row of setiferous punctures; another longitudinal row of setiferous punctures in lateral margin; close to posterior angles a further setiferous puncture; distance between posterior angle and setiferous puncture at least two times of diameter of puncture; between normal punctures with sparse micro-punctation; without microsculpture; surface polished and shiny.

Elytra 0.91 mm long, 1.00 mm wide; with distinct rectangular shoulders, marked by short prominent teeth; widest shortly behind middle; punctation deeper, but not denser than on pronotum; few setiferous punctures on disc and longitudinal row of setiferous punctures in lateral margin; weak coriaceous ground sculpture.

Aedeagus with long apical lobe; placed in rectangular angle to basal lobe; apex with short tooth; tube like endophallus with indistinct torsions; sinuate parameres as long as apical lobe.

Etymology. The specific name is derived from the close resemblance to H. leticiae and means similar as H. leticiae .

Distribution. Known only from the type locality.

Figures

Figs 12–15. 12 – Holotrochus tortilis sp. nov.; 13 – H. lobatus sp. nov.; 14 – H. agostii sp.nov.; 15 – H.pseudoleticiae sp. nov. Body parts:A – aedeagus; B – antenna; C – last sternite. Scale bar: 0.1 mm.

Fig. 19. Head, pronotum, and elytra of Holotrochus Erichson, 1839 showing shape, punctation, and microsculpture. A – H. agostii sp. nov.; B – H. pseudoleticiae sp. nov. Scale bars: 0.5 mm.