Baltistena soror (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 : 459

Baltistena soror (Ermisch, 1941) comb. nov.

( Figs 5A–E )

Mordellistena soror Ermisch, 1941a:180 . Syntype (number of specimens not mentioned): Baltic amber.

Type material examined. SYNTYPE: ( SDEI): ‘ MORDELLISTENA [p] / soror [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 a bigger white label] // SDEI Müncheberg / SDEI-AMB-000638 [p; yellowish label]’.

Comments on identification. At least mesotarsomere IV is very dilated so this species cannot be assigned 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 5. A–J – Mordellistenini, Baltic amber. A–E – Baltistena soror (Ermisch, 1941), type: A – habitus. B – middle leg. C – posterior pronotal margin. D, E – head and thorax. F–J – Baltistena sergeli (Ermisch, 1943), holotype: F – habitus; G, H – hind legs; I – maxillary palpomeres IV (black arrows); J – protarsus. Scale bars: A, F, I – 0.5 mm, B – 0.05 mm; C, J – 0.2 mm; D, E, G, H – 0.3 mm.