Baltistena amplicollis (Ermisch, 1941) Batelka & Rosová & Prokop, 2023

Batelka, Jan, Rosová, Kateřina & Prokop, Jakub, 2023, Diversity and morphology of Eocene and Oligocene Mordellidae (Coleoptera), Acta Entomologica Musei Nationalis Pragae 63 (2), pp. 451-478 : 458

Baltistena amplicollis (Ermisch, 1941) comb. nov.

( Figs 2D–G )

Mordellistena amplicollis Ermisch, 1941a: 182 . Holotype: Baltic amber.

Type material examined. HOLOTYPE ( SDEI): ‘ MORDELLISTENA [p] / amplicollis [hw] / det. Ermisch 194 [p] i [hw, sic; white label glued on a bigger white label] // TYPE [p; in black frame, red label glued on the bigger white label] // SDEI Müncheberg / SDEI-Amb-000640 [p; yellowish label]’.

Comments on identification. As pro- and mesotarsomere IV are distinctly broader and shallowly emarginated, this species cannot be attributed to Mordellistena . To distinguish it from other Eocene Mordellistenini see the Key below. Because of the uncertain generic identity of this species, it is transferred here into Baltistena new collective group.

Figures

Figs 2. A–G – Mordellistenini.A–C – Palaeostena eocenica Kubisz, 2003, PřfUK107, Rovno amber:A – habitus; B – head and antenna; C – mesotarsus with smooth pretarsal claws (black arrow) and protarsus with emarginated tarsomere IV (white arrow). D–G – Baltistena amplicollis (Ermisch, 1941), holotype, Baltic amber: D – habitus; E – hind leg; F – head ventrally; G – middle leg with emarginated tarsomere IV. Scale bars: A, D – 0.5 mm; B, C, G – 0.2 mm; E, F – 0.3 mm.