Petrosyne liassica Ponomarenko, 1969

Yan, Evgeny V., Beutel, Rolf G. & Ponomarenko, Alexander G., 2017, Ademosynidae (Insecta: Coleoptera): A new concept for a coleopteran key taxon and its phylogenetic affinities to the extant suborders, Palaeontologia Electronica 5 (8), pp. 1-22 : 13

Petrosyne liassica Ponomarenko, 1969 P. liassica : Ponomarenko, 1969, p. 135

Figure 5.1, 5.2

Material. Holotype: PIN 166 /39, South Fergana , Kirghizstan, Kyzyl-Kiya, Early Jurassic.

Revised description. Pronotum beaded; prosternal intercoxal process 1.5 times longer than procoxae. Mesosternal longitudinal suture reaches half-length of mesoventral pit length. Metaventrite and metanepisterna with thickened margins. Visible abdominal sternites 1-4 equal in length; apical sternite1.5 times longer than penultimate, incised at the apex. See measurements in the Table 1.

Figures

FIGURE 5. Petrosyne Ponomarenko, 1969 and ademosynid beetles re-assigned to Polyphaga suborder, photos and line drawings. 1, 2 Petrosyne liassica Ponomarenko, 1969, holotype PIN 166/39. 3, 4 Ranis collevus Ponomarenko, 1969, holotype PIN 371/1755 and line drawing. 5, 6, R. ovalis Ponomarenko, 1969, holotype PIN 2066/2642. Scale bars equal 1 mm. Label abbreviations: cx.r – coxal rests; msc – mesoscutum; tb1 – protibia.