Sucinoptinus brevipennis, Bellés & Perkovsky, 2016

Bellés, X. & Perkovsky, E. E., 2016, New Data On The Genus Sucinoptinus (Coleoptera, Ptinidae) From Rovno Amber, Vestnik Zoologii 50 (1), pp. 17-22 : 18-20

Sucinoptinus brevipennis sp. n.

M a t e r i a l. Holotype. Possibly male. SIZK D-2295 , Dubrovitsa , Rovno amber, Late Eocene ( fig. 1 , 2).

Syninclusions: Mycetophilidae, Acari (Parasitengona) , numerose stellate hairs.

D e s c r i p t i o n. Length: 1.6 mm. Slender, parallel-sided; color brownish-piceus ( fig. 1 , 2). Head finely punctuated and pubescent; interantennal space narrow and rather flat; eyes hemispherical, quite prominent and finely faceted. Antennae eleven segmented, slender and long, slightly longer than the elytral length, covered with semierect pubescence; antennomere proportions according to the formula: 7–3–4–4–4–4–4–4–4.5–5–8.5 ( fig. 1 , 2). Pronotum slightly longer than wide and wider than a single elytron; apical margin widely convex anteriorly, partially concealing the head; sides slightly rounded, only slightly constricted near the base, moderately convex at the disk and showing a quite apparent transversal depression in the posterior third; surface irregularly sculptured in the anterior third, with round, small tubercles in the disk, and with small elongated tubercles in the posterior third transversal depression; pubescence formed by short semi-recumbent hairs evenly distributed ( fig. 1 , 2). Legs short and robust covered with short recumbent pubescence; tarsi relatively long, nearly as long as tibiae; mesotarsi with tarsomere proportions according to the formula: 5–1.5–1.5–1–5. Scutellum triangular, as long as wide. Elytra subparallel and short, only slightly longer than twice the length of the pronotum; humeri prominent; elytral surface serially punctuated by elongated strial punctures, leaving an interstriae interval about twice wider as the width of the striae; pubescence formed by semirecumbent short setae inserted in the punctures (with a length similar to that of the puncture) and erect and moderately long (somewhat longer than those of the punctures) setae inserted in the intervals ( fig. 1 , 2).

D i a g n o s t i c c h a r a c t e r s. S. brevipennis is similar to the previously known species, S. bukejsi and S. sucini in having the same general structure of the prothorax, but differing from these species in having much shorter elytra, with a proportion length of the pronotum (LP)/length of the elytra (LE) = 2.1. This clearly differs from the proportion found in S. sucini (LE/LP = 2.7), in S. bukejsi (LE/LP = 2.6, according to measurement made on the pictures sent by V. Alekseev) and in S. rovnoensis , described above, where LE/LP = 3.0.

E t y m o l o g y. The specific name refers to the shortness of the elytra, which is the most typical feature of the new species.

Figures

Fig. 1. Sucinoptinus from Rovno amber: 1 — Sucinoptinus rovnoensis sp. n. Holotype, SIZK UA-335; 2 — Sucinoptinus brevipennis sp.n. Holotype, SIZK D-2295; 3 — Sucinoptinus sp.? SIZK UA-284; 4 — Sucinoptinus sp.? SIZK K-6067; 5 — Sucinoptinus? sp.? SIZK K-25483; 6 — Rovno amber deposits with Sucinoptinus inclusions: a — Dubrovitsa, b — Klesov. Scale 0.5 mm.