Linoderus smetanai, Chani-Posse, 2021

Chani-Posse, Mariana Raquel, 2021, A new species of the southern Central American genus Linoderus Sharp (Coleoptera: Staphylinidae: Staphylininae) with a revised key and an updated phylogeny, Zootaxa 5060 (3), pp. 439-446 : 440-441

Linoderus smetanai sp. n.

urn:lsid:zoobank.org:act:C1126DAF-F279-4322-8592-713D62C21A61

( Figs. 1–12 )

Diagnosis. Linoderus smetanai differs from L. alajuelensis and L. gracilipes in the distinct colour pattern: head and prothorax dark metallic blue, elytra metallic green, abdomen with first five visible abdominal segments reddish brown and apical abdominal segments dark brown to black; antennae and palpi mostly reddish brown to brown, with legs and styli dark brown to black as well as the first antennomere moderately longer than half of head length*, labial palpus with second palpomere about as long as third*, the first metatarsomere not sexually dimorphic in length*; the abdominal tergites 3–5 with posterior basal transverse carina (PBTC) complete and straight, space behind PBTC not distinctly punctate* and the sternite 9 with several apical setae at each side of emargination are also unique to this species.

* Not shown as characters with interspecific variation in the redescription of the genus by Chani-Posse & Solodovnikov (2017)

Description. Body length 7.7–8.5 mm. Colouration: as in diagnosis ( Figs. 1, 2 ). Head slightly longer than wide (HW/HL = 0.93–0.94), moderately wider than pronotum (HW/PW = 1.16–1.18). Eyes distinctly shorter than temples (EL/TL = 0.65; both sexes) seen from above ( Figs. 1, 2 ). Antennae with 1st antennomere moderately longer than half of head length (A1/HL = 0.66; both sexes), moderately shorter than 2nd and 3rd combined, 3rd about 1.5 × as long as 2nd. Labial palpus with 2nd palpomere about twice as long as 1st, about as long as 3rd. Maxillary palpus with 4th palpomere (apical) 1.8 × as long as 3rd. Neck about 0.4 × as wide as head at widest point. Pronotum distinctly longer than wide (PW/PL = 0.71–0.72), dorsal rows of punctures each with four punctures, 2nd and 3rd more distant to each other than 2nd to 1st and 3rd to 4th. Elytra at sides about 1.5 × as long as elytra along suture (EtL/Etl= 1.57; both sexes). First metatarsomere not sexually dimorphic in length, distinctly longer than 5th in both sexes (S1/S5 = 1.55–1.66). Abdominal tergites 3–5 with posterior basal transverse carina complete and straight, space behind not distinctly punctate. Male sexual characters: Sternite 8 with medially produced and subangulately emarginate projection ( Fig. 3 ). Sternite 9 with basal portion distinctly asymmetrical, 1.8 × as long as distal portion and deeply emarginate apically, with several apical setae at each side of emargination ( Fig. 4 ). Genital segment with lateral tergal sclerites 9 (styli) dorsoventrally flattened and moderately dilated, with a distinct latero-apical emargination ( Fig. 8 ); tergite 10 subtruncate apically. Aedeagus with median lobe gradually narrowed from about distal half of paramere length and with acute apex; apex of paramere distinctly notched at middle ( Figs. 6, 7 ). Female sexual characters: Sternite 8 with hind margin projected medially ( Fig. 10 ). Genital segment with lateral tergal sclerites 9 (styli) dorsoventrally flattened and not distinctly dilated, with a moderate latero-apical emargination ( Fig. 12 ); tergum 10 subangulate to arcuate apically ( Fig. 9 ); second gonocoxites each with a long macroseta, with minute stylus ( Fig. 11 ) bearing one long apical macroseta.

Geographical distribution. Linoderus smetanai has been recorded from four different localities in Western Costa Rica within the 1480–1640 m range of elevation.

Etymology. The specific name is dedicated to Dr. Aleš Smetana in recognition of his pioneering work and great legacy in the modern study of the subfamily Staphylininae .

Remarks. The new species fully fits into the generic diagnosis provided by Chani-Posse & Solodovnikov (2017).

Type material. Holotype ♂ ( Fig. 1 ), with labels: [white label]´CR. Pnt. 1500m / Reserva de / Monteverde / 1-4.VI. 1979 / JM&BA Campbell´, [red label]´ Holotype Linoderus smetanai Chani-Posse 2021 ´( CNC). Six ♀ paratypes with labels: [white label]´CR. Pnt. 5000’ / Reserva de / Monteverde / 27-29.VI. 1979 / JM&BA Campbell´, 1 ( CNC) ( Fig. 2 ); [white label]´ Costa Rica: Cartago P.N. Tapanti / 17-20 JUL 2000 J. Ashe, R. Brooks, Z. Falin / 1480m 9° 43´12´´N, 83°46´36´´W / ex. Flight intercept trap CR1ABFOO 194´, 2 ( SEMC); [white label]´ Costa Rica: Guanacaste Prov. 8 km N Sta Elena / Santa Elena Forest Res. 11-17-VI-2001 / S. & J. Peck 1640m 10° 20.701´N, 84° 47.899´W / ex. FIT CR1P01 004´, 1 ( SEMC); [white label]´Vara Blanca VIII.38 / Field Mus. Nat. Hist. 1966 A. Bierig Collection, Acc. Z. 13812´, 1 ( FMNH); all of them with [red label] ´Paratype Linoderus smetanai Chani-Posse 2021 ´.

Figures

FIGURES 1–12. Habitus of Linoderus smetanai sp. n.: (1) male holotype and (2) female paratype. Linoderus smetanai, male and female genitalia: (3) male sternite 8; (4) sternite 9; (5) male tergite 10; (6) aedeagus in ventral view; (7) aedeagus in lateral view; (8) male lateral tergal sclerite 9; (9) female tergite 10; (10) female sternite 8; (11) gonocoxites of female genital segment; (12) female lateral tergal sclerites 9.