Hypotelus brevitarsus 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 brevitarsus

description: Hypotelus brevitarsus Bortoluzzi & Caron sp. nov.
(Figs. 15, 39, 58, 69, 70, 80, 98, 99, 114)
Type material. Holotype deposited in FMNH, male (photo, Fig. 15), with labels: (1) “ PANAMA: Chiriqui Prov. “ Barca ” area, Finca / Lerida nr. Boquete./III:12:1959 5650 ft.” [white label, printed in black; day and elevation handwritten]; (2) “under slab on/pile of cut chips/and bark” [white label, printed in black]; (3) “leg./ H. S. Dybas ” [white label, printed in black]; (4) “ HOLOTYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [red label, printed in black].
Paratypes: 11 specimens, deposited in FMNH. 1 male, dissected, whole specimen fixed on acetate plastic card covered with Canada balsam, with the same three first labels of holotype: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 1female, dissected, terminalia fixed on acetate plastic card covered with Canada balsam, with same three first labels of holotype: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 1 female, dissected, terminalia fixed on acetate plastic card covered with Canada balsam, with same three first labels of holotype, except for the date: “III:14:1959.”: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 7 specimens, sex undetermined, with same three first labels of holotype: (4) “PARATYPE/ Hypotelus brevitarsus /Bortoluzzi & Caron” [yellow label, printed in black]; one specimen of them with additional label: (4) “ Hypotelus /det. Newton 1994” [white label, first line, handwritten; second line, printed in black]; (5) “PARATYPE/ Hypotelus brevitarsus / Bortoluzzi & Caron” [yellow label, printed in black]. 1 specimen, sex undetermined, with same three first labels of holotype, except for the date: “III:14:1959.”: (4) “PARATYPE/ Hypotelus brevitarsus /Bortoluzzi & Caron” [yellow label, printed in black].
Additional material. See Appendix 2.
Diagnosis. Hypotelus brevitarsus sp. nov. is similar to H. pusillus and differs by the antennal scape of male without prominent tooth on inner face; the antennae shorter, not reaching half-length of elytra; and tergite 10 with lateral sides at posterior margin emarginated in both sexes (Figs. 58, 98), besides the genital structures (see below). H. brevitarsus sp. nov. may be distinguished from other species of Hypotelus by the metatarsomeres 5 somewhat shorter and transverse (Fig. 39), although in some specimens this is not so prominent.
Description. BL: 2.2–2.9 mm, BW: 0.6–0.8 mm. Body slightly convex; dorsal surface glossy; brown (elytra yellow); appendages lighter, except mandibles. Dorsal integument of head and pronotum with dispersed fine punctures and undulate microstriae only on margins; elytra with dispersed fine punctures and only one longitudinal finely punctate stria close to elytral suture.
Male. Head. Supra-antennal area slightly prominent. Antennae reaching humeral angle; antennomeres 5, 7, 9 and 11 with longest setae on inner face; antennomeres 2 and 3 of equal length, 5–11 gradually increasing in length toward antennal apex. 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 basal half. Elytra somewhat longer than wide (EL/ BW=1.1), covering partially or not abdominal tergite 3. Metatarsomeres 5 somewhat shorter and transverse (Fig. 39).
Abdomen. Tergite 8 with posterior margin rounded; sternite 8 with posterior margin rounded; tergite 9 with short ventral struts; sternite 9 with posterior margin truncate and with two pairs of long setae; tergite 10 with posterior and lateral margins weakly pigmented, with short fringes and four setae on each side (Fig. 58). Median lobe of aedeagus with bulbous base in ventral view and curved shape in lateral view (Figs. 69–70).
Female. Similar to male except for: without very long setae on antennomeres 5, 7, 9 and 11; abdominal sternite 8 with posterior margin somewhat truncate and posterio-laterally slightly emarginated, with short setae (Fig. 80); tergite 9 without ventral struts; bursa copulatrix as H. pusillus; 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. 99.
Geographical records. Panama (Chiriqui) (Fig. 114).
Biological notes. This species was collected at elevations between 4750 ft (1447 m) and 6900 ft (2013 m), under a slab on a pile of cut chips and bark, in a split sapling, in scraping, in torn fibers of a wounded tree and under bark of a log on the ground.
Remarks. Some specimens may have the metatarsomeres a little less transverse. The longest setae on inner face of antennomeres 5, 7, 9 and 11 are sometimes not so visible.
In the material examined, there are five specimens collected from 4750ft (1447 m), which do not have the metatarsomeres 5 shorter and transverse, and we are unable to segregate these 5 specimens into more than one species. The feature metatarsomere 5 shorter and transverse is only visible on the specimens collected above 5000ft (1524 m).
Etymology. The specific name refers to the shape of the metatarsus and is a compound name: Latin adjective brev - (short), the connective vowel i, and the Greek noun latinized to tarsus (foot). It is a noun in apposition.
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 462-463, DOI: 10.11646/zootaxa.4273.4.1, http://zenodo.org/record/803644