Cryptophagus incomptus, Esser, 2021

Esser, Jens, 2021, Cryptophagus incomptus nov. sp. from Taiwan (Coleoptera, Cryptophagidae), Linzer biologische Beiträge 53 (1), pp. 45-47 : 46

Cryptophagus incomptus nov.sp. ( figs 1-4 )

T y p e m a t e r i a l: Holotype ♁: " Taiwan, Nantou, Ren'ai , 1950 m, deciduous forest, litter sifted, 24°01'19''N, 121°11'45''E, 27.VII.2018, Hetzel leg." [cES].

E t y m o l o g y: Incomptus – Latin for “simple”.

D e s c r i p t i o n: Male, monochrome reddish-brown, 2.3 mm, membranous wings fully developed, covered with pale and decumbent pubescence (on sides of elytra hairs partially more erected). Elytra with longer hairs forming indistinct rows but not more erected than the remaining.

Head with eyes large and hemispherical, punctuation strong, interspaces smaller than the diameter.

Pronotum convex, transverse (1.3x broader than long) with anterior callosities merging without distinct ledge into lateral margin. Middle tooth on side of pronotum small and indistinct, located in the middle between anterior and posterior angle. Lateral margin smooth before and indistinct serrated behind the middle tooth. Anterior angles rounded, not prominent; anterior margin moderately convex. Posterior margin moderately convex in middle two quarters, straight between posterior angles and foveae. Punctuation strong, interspaces somewhat smaller than the diameters.

Elytra moderately convex, elongated, nearly parallel in anterior two thirds. Punctuation (basal third) moderate, finer than on head and pronotum, more sparse (interspaces larger than diameters). Suture indistinct in the basal third.

Legs more stout, tarsal formula 5-5- 4 in male (female unknown, without doubt 5-5-5). Anterior tarsomeres 1 to 4 widened (only in male), tarsomeres 1 to 4 of metatarsus more indistinct widened.

Antennae 11-segmented including a 3-segmented club. Segment 1 short and thick, nearly barrel-shaped, segment 2 smaller, elongated. Segments 3 to 8 of decreasing length, more (8) or less (3) pear-shaped. 9 and 10 moderately convex, 11 long as broad, asymmetric.

Parameres ( fig. 4 ) elongated triangular.

C o m m e n t: The new species resembles Cryptophagus pallidus STURM, 1845 (West Palaearctic) due to the anterior callosities. The species differs by a convex pronotum less flattened laterally and shorter parameres. The nearctic C. croceus ZIMMERMANN, 1869 resembles by general shape of pronotum but with larger callosities, more distinct middle tooth located before the middle and shorter parameres.

Figures

Figs 1-4: Holotype of Cryptophagus incomptus nov.sp. (1) habitus (dorsal view); (2) pronotum (dorsal view); (3) pronotum (lateral view) and (4) parameres.