Hypotelus castaneus Bortoluzzi & Caron, sp. nov.
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 castaneus

description: Hypotelus castaneus Bortoluzzi & Caron sp. nov.
(Figs. 14, 20, 21, 28, 32, 46,47, 50, 54, 57, 71, 72, 81, 95, 96, 97, 113)
Type material. Holotype deposited in FMNH, male (photo, Fig. 14) [damaged specimen: without left antennomeres 3–11], with labels: (1): “ PERU: Cuzco Dept.,/ Consuelo, Manu rd. / Km 165, 10-X-1982,” [white label, printed in black]; (2) “ FMHD #82-363, ex/bamboo shoots, L. E./Watrous & G. Mazurek ” [white label, printed in black]. (3) “ HOLOTYPE / Hypotelus castaneus / Bortoluzzi & Caron ” [red label, printed in black].
Paratypes: 11 specimens, deposited in FMNH. 4 males with the same two first labels of holotype: (3) “ PARATYPE / Hypotelus castaneus / Bortoluzzi & Caron ” [yellow label, printed in black]; two of them dissected, fixed on acetate plastic card coved with Canada balsam. 7 females with the same two first labels of holotype: (3) “ PARATYPE / Hypotelus castaneus / Bortoluzzi & Caron ” [yellow, printed in black]; two of them dissected, terminalia fixed on acetate plastic card coved with Canada balsam.
Additional material. See Appendix 2.
Diagnosis. Hypotelus castaneus sp. nov. may be distinguished from other species of Hypotelus by the front with two slightly pointed frontal processes (Figs. 20–21); males may be distinguished by the prominent tooth on antennal scape, antennomeres 5–11 longer than wide and apex of aedeagus wider than other (Fig. 72); the shape of the bursa copulatrix (Fig. 95) distinguishes females.
Description. BL: 2.6–3.0 mm, BW: 0.7–0.8 mm. Body slightly convex; dorsal surface glossy; reddish dark brown, appendages lighter (Fig. 14). Dorsal integument of head and pronotum with dispersed 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 slightly prominent. Front with two slightly pointed frontal processes (Figs. 20–21); Antennae almost reaching apex of elytra; scape with prominent tooth on inner face; antennomere 3 longer than 2; 5–11 longer than wide, with same length. Mandibles symmetrical. Mentum 1.6 times as wide as long.
Thorax. Pronotum wider than long (PW/PL=1.3); anterior angles rounded and slightly prominent; apical half with somewhat parallel sides and basal half gradually narrowing toward the base; with complete internal midlongitudinal ridge and slight longitudinal median sulcus only on disc. Elytra somewhat longer than wide (EL/ BW=1.1), covering partially or entirely abdominal tergite 3.
Abdomen. Tergite 8 with posterior margin rounded (Fig. 50); sternite 8 with posterior margin narrower and rounded, with short setae except in the middle region (Fig. 54); tergite 9 with short ventral struts; sternite 9 with posterior margin truncate and with two pairs of long setae; tergite 10 at apex with four setae on each side and short fringes (Fig. 57). Median lobe of aedeagus truncate at apex and with one prominent process on median region at posterior margin in ventral view and curved shape in lateral view (Figs. 71–72).
Female. Similar to male except for: longer distance between pointed frontal processes (Fig. 21); antennae shorter, with antennomeres 5–10 shorter in length; scape without prominent tooth on inner face; abdominal sternite 8 with short setae and posterior margin emarginate except in the middle region (Fig. 81); tergite 9 without ventral struts; tergite 10 weakly pigmented at apex (Fig. 96); bursa copulatrix forming a narrow duct at basal half and apical half bulbous (Fig. 95); ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and has many long setae on apex; spermatheca with globose capsule (Fig. 97).
Geographical records. Peru (Cusco), Colombia, Costa Rica (Puntarenas), Panama (Chiriqui) and Venezuela (Aragua) (Fig. 113).
Biological notes. The specimens have been found in bamboo shoots, in cloud and rain forests, under a slab on pile of cut chips and bark, in floor litter on a slope above stream-good forest cover. Some specimens were collected by Berlese extraction of leaf litter.
Etymology. The specific name refers to the brown color of the entire body and it is a Latin masculine adjective: castaneus (of the color of chestnuts).
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 463-464, DOI: 10.11646/zootaxa.4273.4.1, http://zenodo.org/record/803644