Abstract
Fossil beetles are described from Kedrovka beds of the locality Babii Kamen’, Kuznetsk Basin, Siberia. According to different authors, this locality is dated to the terminal Permian or basal Triassic. SEM studies have shown that Ademosynoides asiaticus Martynov, 1936, described from this locality, should be placed in the family Trachypachidae, which makes it the earliest known extant family of beetles. In addition to the re-studied holotype, further material is described for this species; a new species of the same genus and a new genus and species of the same family are also described. As a result, almost 10% of the 78 beetle fossils known from this locality are identified as belonging to Trachypachidae. Unfortunately, the study of these beetles is complicated by the rather poor preservation quality and very small size of the majority of the fossils, which usually cannot be properly studied without using SEM. However, even in this case there is no full certainty that the results are absolutely reliable.
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Original Russian Text © A.G. Ponomarenko, A.N. Volkov, 2013, published in Paleontologicheskii Zhurnal, 2013, No. 6, pp. 41–46.
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Ponomarenko, A.G., Volkov, A.N. Ademosynoides asiaticus Martynov, 1936, the earliest known member of an extant beetle family (Insecta, Coleoptera, Trachypachidae). Paleontol. J. 47, 601–606 (2013). https://doi.org/10.1134/S0031030113060063
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DOI: https://doi.org/10.1134/S0031030113060063