Published May 28, 2024 | Version v1

Dytiscidae

  • 1. Department of Entomology, National Museum, Cirkusová 1740, CZ- 193 00 Prague 9 - Horní Počernice, Czech Republic.
  • 2. Laboratory of Arthropods, A. A. Borissiak Paleontological Institute, Russian Academy of Sciences, 117647 Moscow, Russia; & Paleontological Laboratory, Cherepovets State University, 162600 Cherepovets, Russia;
  • 3. Natural History Museum of Denmark, Universitetsparken 15, Copenhagen 2100, Copenhagen, Denmark;

Description

Dytiscidae sp. indet.

(Figs. 9–10)

Material studied. DK 390 (NHMD 624949): Fur Formation; Silstrup Member, Klitgården Klint (cliff), Mors, ash layers from +25 to +30. Incomplete imprint of beetle, without head and part of pronotum, with partly preserved hind legs.

Diagnosis. Oval medium-sized beetle (Fig. 9), total length around 13 mm, length of elytron 8.6 mm, maximum width near shoulders 6.3 mm. Lateral lobe of metaventrite short. Metatarsus with long natatorial setae on dorsal margin and strong sharp setae on ventral margin; metatarsal claws subequal in shape and size (Fig. 10).

Comments. Poor preservation of the fossil does not allow identifying this specimen precisely. Based on its large size and the shape of the metatarsus, affiliation to the subfamily Agabinae, and in particular to the genus Agabus Leach, 1817, is the most likely option.

Notes

Published as part of Prokin, Alexander A., Hájek, Jiří, Vasilenko, Dmitry V. & Perkovsky, Evgeny E., 2024, The oldest Rhantus (Coleoptera, Dytiscidae) from the earliest Eocene Fur Formation, Denmark, pp. 263-274 in Zootaxa 5458 (2) on pages 268-269, DOI: 10.11646/zootaxa.5458.2.5, http://zenodo.org/record/11369762

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Additional details

Biodiversity

Kingdom
Animalia
Phylum
Arthropoda
Order
Coleoptera
Family
Dytiscidae
Taxon rank
family