Laetopsia bontsaganica ( Prokin, 2009 ) Fikáček & Prokin & Angus & Pono & Marenko & Yue & Ren & Prokop, 2012

Fikáček, Martin, Prokin, Alexander, Angus, Robert B., Pono, Alexander, Marenko, Yue, Yanli, Ren, Dong & Prokop, Jakub, 2012, Revision of Mesozoic fossils of the helophorid lineage of the superfamily Hydrophiloidea (Coleoptera: Polyphaga), Acta Entomologica Musei Nationalis Pragae 52 (1), pp. 89-127 : 96

† Laetopsia bontsaganica ( Prokin, 2009) comb. nov.

( Fig. 62 )

Hydrophilopsia bontsaganica Prokin, 2009 a: 54 . Hydrophilopsia bontsaganica: PROKIN (2009 b: 660) .

Type locality and age. Mongolia, Bayankhongor province, foothills of the Dund Ula Mts., S of Bööntsagaan Lake. Lower Cretaceous, Barremian or Aptian, ca. 130–112 mya ( RASNITSYN & ZHERIKHIN 2002).

Material examined (1 spec.). HOLOTYPE: PIN 3559/6370 (piece only, specimen in dorsal view).

Redescription. Body elongate oval, 8.8 mm long. Head with very distinct frontoclypeal suture, its median portion grooved, anterior portion of clypeus straight. Pronotum slightly transverse, bearing median groove, lateral margins smooth, arcuate. Elytron with darkened striae. Abdomen with five ventrites.

Note. Although the only known specimen is poorly preserved, the combination of elytra with dark striae, the distinct frontoclypeal suture with grooved median portion and the presence of the median groove on the pronotum clearly assign the species to the genus Laetopsia .

Figures

Figs. 53–62.Representatives of Laetopsia gen.nov.53–56 – L.baissensis (Ponomarenko, 1986) (53 – PIN 3064/7016; 54–55 – PIN 3064/6987, piece and counterpiece; 56 – detail of PIN 3064/6987). 57, 61 – L. hydraenoides (Prokin, Ren & Fikáček, 2010), CNU 2010021, holotype (57 – detail of head and pronotum; 61 – general view). 58–60 – L. mongolica (Ponomarenko, 1987) (58 – PIN 3664/1661, detail of head and pronotum; 59 – PIN 3664/1772; 60 – PIN 3664/1567, holotype). 62 – L. bontsaganica (Prokin, 2009), holotype. Scale bars: 1 mm.