Cretodytes incertus, Prokin, Alexander A., Petrov, Pyotr N., Wang, Bo & Ponomarenko, Alexander G., 2013

Prokin, Alexander A., Petrov, Pyotr N., Wang, Bo & Ponomarenko, Alexander G., 2013, New fossil taxa and notes on the Mesozoic evolution of Liadytidae and Dytiscidae (Coleoptera), Zootaxa 3666 (2), pp. 137-159 : 152

Cretodytes incertus sp. n.

Etymology: From the Latin incertus (unclear); adjective in the nominative singular.

Material: Holotype PIN 4626/628, direct impression of beetle without head, prothorax and legs; Chernovskiye Kopi (also transliterated as Chernovskie Kopi), Transbaikalia, Russia, left bank of the Ingoda River, Late Jurassic – Early Cretaceous , Doronino Formation.

Description ( Figs 19, 20 ): Small oval light beetle. Elytron thin, wing venation visible as loop at base of oblongum. Maximum body width situated at level of middle of metacoxal plates. Mesocoxae rounded. Metacoxal plate 3.3 times as long as lateral lobe of metaventrite (LC/LV = 3.3). Metacoxal processes rounded, slightly elevated above metacoxal plates.

Measurements: Body length, probably around 7 mm; body width, 3.6 mm; elytron length, 5.3 mm.

Comparison: The new species differs from C. latipes Ponomarenko, 1977 in the smaller body length and width and shorter lateral lobe of the metaventrite and metacoxal processes.

Figures

FIGURES 19 – 21. Cretodytes incertus sp. n.: (19) photo of holotype, (20) line drawing of holotype; (21) Angaragabus jurassicus Ponomarenko, 1963: photo of holotype, PIN 1670 / 390.