Baissobius minimus Rasnitsyn

Olmi, Massimo, Rasnitsyn, Alexander P. & Guglielmino, Adalgisa, 2010, Revision of rock fossils of Dryinidae and Embolemidae (Hymenoptera: Chrysidoidea), Zootaxa 2499, pp. 21-38 : 23-24

Baissobius minimus Rasnitsyn

Baissobius minimus Rasnitsyn, 1996: 186 .

Material examined: male holotype, PIN no. 4210/1195 from Central Siberia, West Transbaikalia, left bank of Vitim River, 3 km downstream from the former lodge Baissa, marls of Zaza formation, earlier Early Cretaceous (Neocomian stage) (130–140 mybp).

MALE ( Figs 3, 4 ): fully winged; length 3.12 mm. Antennae very thick; antennal segments 7–10 in following proportions: 7:6.5:6:11 (rest of antennae not visible); length/breadth ratio of antennal segments 7–10: 7th: 7:6; 8th: 6.5:6; 9th: 6:5; 10th: 11:6. Notauli not visible. Forewing only partly visible. Length/breadth ratio of pterostigma: 12:5 (2.4). Ratios between the body regions: head (28): eyes (11): pronotum (2.5): scutum (16): scutellum + metanotum (18): propodeum (14): gaster (51).

FEMALE: unknown.

Remarks: the authors present the above and the following redescriptions of Baissobius species to make the original descriptions homogeneous with respect to the morphological characters described in the revision of world Embolemidae by Olmi (1996). In addition the authors believe that it is useful to have a complete treatment of all known rock fossils.

Figures

FIGURES 3 – 4. Baissobius minimus Rasnitsyn (length 3.1 mm) from ventral (Fig. 3) and dorsal (Fig. 4) side.