Cephennium filabresicum, Assing, 2021

Assing, Volker, 2021, On the Cephennium fauna of the Iberian Peninsula and the Atlantic Islands (Coleoptera, Staphylinidae, Scydmaeninae), Linzer biologische Beiträge 52 (2), pp. 891-931 : 919-920

Cephennium filabresicum nov.sp. ( Figs 8 , 21 , 48 , Map 2 )

Type material: Holotype ♂:"E - Andalucía [15], Sierra de los Filabres , S Serón , 1800 m, grassland, 37°15'44N 02°30'30W, 19.III.2008, V. Assing / Holotypus ♂ Cephennium filabresicum sp. n. det. V. Assing 2020" ( cAss).

Etymology: This specific epithet is an adjective derived from the name of the mountain range where the type locality is situated.

Description: Body length 1.1 mm. Habitus ( Fig. 8 ) slender; body weakly convex. Colouration yellowish-red.

Eyes reduced to two ommatidia without pigmentation. Antenna slender, 0.53 mm long; antennomeres VI and VIII moderately transverse, VII approximately as broad as long, IX and X approximately 1.5 times as broad as long, and XI nearly twice as long as broad.

Pronotum 1.18 times as broad as long. Punctation dense and extremely fine, barely noticeable; interstices without microsculpture.

Elytra slender, each anteriorly with a large transversely oval tomentose impression and with a fine and long supra-humeral carina; punctation very fine and dense.

♂: protibia unmodified; meso- and metatibiae somewhat flattened on inner face in apical portions; aedeagus ( Fig. 48 ) large in relation to body size, 0.4 mm long; ventral process apically membranous and convex in ventral view; internal structures rather weakly sclerotized and of distinctive shapes; parameres fine and relatively short, far from reaching apex of median lobe, and apically with a moderately short seta.

Comparative notes: This species is characterized among other species of similarly small body size, slender habitus, and pale colouration by slender antennae, eyes composed of two ommatidia, unmodified male protibiae, and by the distinctive morphology of the aedeagus.

Distribution and natural history: The type locality ( Fig. 21 ) is situated in Sierra de Filabresica, Andalucía, South Spain. The holotype was sifted from grass roots in a stony grassland with trees and bushes at an altitude of 1800 m.

Figures

Map 2: Distributions of Cephennium spp. of the C. caecum and C. tensum groups in the Iberian Peninsula and the Baleares, based on Besuchet (unpubl.), OROUSSET (2018), and examined material: C. atomarium (black circles); C. coiffaiti (white circles); C. caecum (black triangles); C. hypogaeum (white diamond); C. minutissimum (white stars); C. catalonicum (black diamonds); C. filabresicum (black star); C. andujari (white triangle).

Figs 7-11: Male habitus of Cephennium asturicum (7), C. filabresicum (8), C. espunae (9), C. tensum (10), and C. tenuissimum (11). Scale bar: 1.0 mm.

Figs 21-22: Type localities of Cephennium filabresicum (21; above) and of C. espunae and C. tenuissimum (22; below).

Figs 46-58: Cephennium catalonicum (46-47), C. filabresicum (48), C. espunae (49), C. tensum (50), C. andujari (51), C. tenuissimum (52-53), C. tensum (54-56; 56: C. p. algeciranum), and C. ibericum (57-58): (46, 48-54, 57) aedeagus in lateral and in dorsal view; (47, 55-56, 58) internal structures of aedeagus. Scale bar: 0.1 mm; 47, 55-56, 58: without scale. 46-47, 54-58: based on Besuchet (unpubl.).