Cephennium immutatum, Assing & Meybohm, 2021

Assing, Volker & Meybohm, Heinrich, 2021, The Cephennium fauna of Turkey and the Middle East (Coleoptera: Staphylinidae: Scydmaeninae), Beiträge Zur Entomologie = Contributions to Entomology 71 (1), pp. 1-28 : 16

Cephennium immutatum spec. nov.

urn:lsid:zoobank.org:act:F24C0315-7B6F-427E-B9AB-65AB304F7718

( Figs 5 , 34–35 , Map 1 )

Type material examined: Holotype : “ N37°26'35 E028°18'07 (4), Türkei Mugla Yatagan, Bozdogan 825 m 19.4.2006, l. Brachat & Meybohm / Holotypus  Cephennium immutatum sp. n., det. V. Assing 2020” (cAss) . Paratypes: 1 : “ N37°28'39 E027°28'41 Türkei Mugla (1), Bafa See Südküste, l. J. Martens 22.3.2006 ” (cAss); 1 : “ N38°24'19 E027°23'31 (17), Türkei Izmir Nif Dagi , 970 m 24.4.2006, l. Brachat & Meybohm” (cAss); 1 : “TR – Adıyaman [22], 50 km NE Adıyaman, 8 km NE Narince, 870 m, 37°54'58N, 38°48'45E, 24.III.2005, P. Wunderle ” (cAss) .

Etymology: The specific epithet (Latin, adjective: unchanged) alludes to the nearly unmodified male protibiae, one of the characters distinguishing this species from C. bodemeyeri .

Description: Body length 1.20–1.25 mm; length of pronotum 0.4 mm; width of pronotum 0.47–0.50 mm; length of antennae approximately 0.55 mm. Habitus as in Fig. 5 . Colouration: body dark-brown.

Eyes composed of approximately ten ommatidia. Antenna with pronounced club formed by antennomeres IX–XI; antennomere VIII slightly smaller than antennomere VII and much smaller than antennomere IX; antennomere XII less than twice as long as broad.

Pronotum 1.18–1.25 times as broad as long, broadest in anterior half, and moderately convex in cross-section; lateral margins straight in posterior half.

Elytra each anteriorly with a subcircular to transversely oval impression with long and tomentose whitish pubescence; humeral carina fine, approximately as long as the combined length of the basal 2–3 antennomeres.

: protibia nearly unmodified, very weakly curved subapically; aedeagus ( Figs 34–35 ) approximately 0.38 mm long; ventral process apically with a short median extension in ventral view; internal sac with a pair of weakly sclerotized small structures and basally with a broad membranous structure; paramere weakly sinuate subapically, far from reaching apex of ventral process, and apically with a moderately long seta.

Comparative notes: This species is distinguished from C. bodemeyeri by slightly smaller size, more slender elytra with less transverse basal impressions, nearly unmodified male protibiae, and a much smaller aedeagus of different shape.

Distribution and natural history: The distribution extends from Izmir and Muğla in the West and Southwest Anatolia eastwards to Adıyaman ( Map 1 ). The specimens were sifted on a rocky north slope with oak, near rocks, and in a stream valley with Platanus and Crataegus . The altitudes range from near sea-level to 970 m. The female paratype (collected in March) appears to be teneral.

Figures

Map 1: Distributions of species of the Cephennium perispinctum group: C. bodemeyeri (black circles); C. liguliferum (white star); C. infractum (white triangle); C. immutatum (white circles).

Figs 1–8: Male habitus in dorsal view (1–6) and head and pronotum in lateral view (7–8) of Cephennium bodemeyeri (1), C. fractum (2–3), C. infractum (4), C. immutatum (5), C. ericinum (6–7), and C. varispinosum (8). Scale bars: 1–6: 1.0 mm; 7–8: 0.5 mm.

Figs 25–35: Aedeagus in ventral view (25, 27, 29–30, 32–35) and apical portion of aedeagus in ventral view (26, 28, 31) of Cephennium perispinctum (25–26), C. fibuliferum (27–28), C. bodemeyeri (29–31), C. fractum (32), C. infractum (33), and C. immutatum (34–35). Scale bars: 25, 27, 29–30, 32–35: 0.2 mm; 26, 28, 31: 0.1 mm.