Hypotelus laevis Solsky 1872
Creators: name: Bortoluzzi, Sidnei
name: Caron, Edilson
name: Ribeiro-Costa, Cibele S.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Hypotelus
Hypotelus laevis

description: Hypotelus laevis (Solsky, 1872)
(Figs. 18, 23, 24, 30, 103, 104, 105, 113)
Piestus laevis Solsky, 1872: 311 (original description: “Monte-Rico (Pérou)”); Blackwelder, 1944: 100 (distribution, error: Solsky, 1871); Herman, 2001: 1791 (distribution).
Piestus (Piestus) laevis: Bernhauer & Schubert, 1910: 7 (distribution, error: Solsky, 1871). Piestus (Eccoptopiestus) laevis: Scheerpeltz 1952: 295 (characters, distribution, error: Solsky, 1871). Hypotelus laevis: Caron et al., 2012: 550 (species name transferred to Hypotelus, neotype designated, redescription, notes,
distribution).
Type material. Hypotelus laevis (Solsky, 1872), neotype deposited in IRSNB, details in Caron et al. (2012).
Additional material. See Appendix 2.
Diagnosis. Hypotelus laevis may be easily distinguished from other species of Hypotelus by a pair of broad and pointed frontal processes on the head, as long as scape (Figs. 18, 23–24) and well-developed dorsal teeth on the mandibles, in both sexes, forming a bifurcate apex (Fig. 30).
Redescription. BL: 3.0– 3.6 mm, BW: 0.8–0.9 mm. Body slightly convex; light brown to dark brown with apical one-quarter of elytra darker (Fig. 18). Dorsal integument of head and pronotum with fine punctures and undulate microstriae; elytra with dispersed fine punctures and only one longitudinal finely punctate stria close to elytral suture.
Male. Head. Supra-antennal area prominent joined with pair of broad and pointed frontal processes, as long as scape, and basal distance between processes narrower than basal width of each one (Fig. 23). Antennae reaching half-length of elytra; antennomere 3 longer than 2, 5–11 gradually increasing in length toward antennal apex.
Mandibles curved and bifurcate at apex, dorsal teeth shorter than ventral (Fig. 30); inner margin with one acute tooth at middle. Mentum 2 times as wide as long.
Thorax. Pronotum wider than long (PW/PL=1.3); anterior angles rounded and not projected; apical two thirds with somewhat curved sides and basal third gradually narrowing toward the base; with complete internal midlongitudinal ridge and slight longitudinal median sulcus on almost entire length of pronotum. Elytra somewhat longer than wide (EL/BW=1.2), covering partially or entirely abdominal tergite 3.
Abdomen. Tergite 8 with posterior margin rounded; sternite 8 with posterior margin narrower and rounded; tergite 9 with short ventral struts; tergite 10 with some long setae on apex and posterior margin with short fringes; sternite 9 with posterior margin truncate and with two pairs of long setae. Median lobe of aedeagus with bulbous base in ventral view and curved shape in lateral view, with apex a little more expanded and rounded (see Caron et al. 2012, Figs. 246–247).
Female. Similar to male except for: pair of frontal processes slightly less developed than on male (24); sternite 8 with short setae on posterior margin; tergite 9 without ventral struts; tergite 10 with posterior margin weakly pigmented, with short fringes and four setae on each side at apex (Fig. 104); bursa copulatrix elongated (Fig. 103); ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and with many long setae on apex; spermatheca as Fig. 105.
Geographical records. Bolivia and Peru (Cusco) (Fig. 113).
Biological notes. Hypotelus laevis has been collected on rotten palm and by Winkler extraction of leaf litter.
description: Published as part of Bortoluzzi, Sidnei, Caron, Edilson & Ribeiro-Costa, Cibele S., 2017, Revision and phylogeny of Hypotelus Erichson: a Neotropical genus of minute rove beetles (Coleoptera, Staphylinidae, Piestinae), pp. 451-487 in Zootaxa 4273 (4) on pages 472-473, DOI: 10.11646/zootaxa.4273.4.1, http://zenodo.org/record/803644