Abstract
Recent studies of extinct soldier beetles have generated an immense amount of new information. Scientists have described various new species of †Cacomorphocerus Schaufuss, 1892, confirming the remarkable diversification and evolution of this genus and the Cantharidae family during the Eocene. In the present work, we describe a new species from Baltic amber. Cacomorphocerus marki sp. nov., is the first species of Cacomorphocerus discovered with filiform 11-segmented antennae. Based on inclusions in Baltic and Rovno amber, it now appears certain that the genus Cacomorphocerus and the tribe Cacomorphocerini Fanti & Kupryjanowicz, 2018 evolved and subsequently went extinct in Europe during the Eocene. Known for more than 100 years from a single species, the genus is now known to be far more morphologically diversified thanks to these recent discoveries.
References
Boheman, C.H. (1858) Coleoptera In: Virgin, C. (Ed.), Kongliga Svenska Fregatten Eugenies Resa omkring jorden under befäl af C. A. Virgin, Åren 1851–1853. Vetenskapliga Iakttagelser på H. M. Konung Oscar Den Förstes befallning utgifna af K. Svenska Vetenskaps Akademien. II. Zoologi. 1. Insecta. P. A. Norstedt & Söner, Almquist et Wiksells, Uppsala and Stockholm, pp. 1–112 + 113–218, pls. I–II. [issued in parts: pp. 1–112 in 1858, 113–218 in 1859]
Brancucci, M. (1980) Morphologie comparée, évolution et systématique des Cantharidae (Insecta: Coleoptera). Entomologica Basiliensia, 5, 215–388.
Bukejs, A., Fanti, F. & McKellar, R.C. (2019) A new species of Cacomorphocerus Schaufuss, 1892 (Coleoptera: Cantharidae) from Baltic amber with a key to known species. Palaeontologia Electronica, 22.2.28A, 1–7.
Fanti, F. & Damgaard, A.L. (2018) Fossil soldier beetles from Baltic amber of the Anders Damgaard amber collection (Coleoptera Cantharidae). Baltic Journal of Coleopterology, 18 (1), 1–32.
Fanti, F. & Kupryjanowicz, J. (2018) Discovery of a new fossil soldier beetle in Eocene Baltic amber, with the establishment of the new tribe Cacomorphocerini. Annales de Paléontologie, 104 (2), 149–153.
https://doi.org/10.1016/j.annpal.2018.02.001
Fanti, F. & Pankowski, M.K. (2019) A new soldier beetle of the extinct tribe Cacomorphocerini Fanti & Kupryjanowicz, 2018. Zootaxa, 4651 (3), 589–595.
https://doi.org/10.11646/zootaxa.4651.3.11
Imhoff, L. (1856) Versuch Einer Einführung in das Studium der Koleoptern. In zwei Theilen und einem, 25 Tafeln lithographirter Abbildungen nebst Text enthaltenden, Anhange. Schweighauser, Basel, xxxi + [2] + 114 + [2] + 272 pp., 25 pls.
Kazantsev, S.V. (2013) New taxa of Baltic amber soldier beetles (Insecta: Coleoptera: Cantharidae) with synonymic and taxonomic notes. Russian Entomological Journal, 22 (4), 283–291.
Kazantsev, S.V. (2018) New Baltic amber soldier beetles (Coleoptera, Cantharidae, Cantharinae). Euroasian Entomological Journal, 17 (2), 146–152.
https://doi.org/10.15298/euroasentj.17.2.11
Kazantsev, S.V. & Perkovsky, E.E. (2014) A new Malthodes and some other interesting soldier beetles (Coleoptera: Cantharidae) from Late Eocene Rovno amber. Russian Entomological Journal, 23 (2), 113–116.
https://doi.org/10.15298/rusentj.23.2.03
Kazantsev, S.V. & Perkovsky, E.E. (2020) The first Cacomorphocerus species (Coleoptera, Cantharidae) from Rovno amber: a second species of the genus with 11-segmented antennae. Zootaxa, 4751 (2), 395–400.
https://doi.org/10.11646/zootaxa.4751.2.14
Kuśka, A. & Kania, I. (2010) New soldier beetles (Coleoptera, Cantharidae) from the Eocene Baltic amber. Zootaxa, 2400 (1), 49–56.
https://doi.org/10.11646/zootaxa.2400.1.5
Parisi, F. & Fanti, F. (2020) Baltic amber: A new Cacomorphocerus Schaufuss, 1892 with two specimens preserved in a single piece, and four new Malthodes Kiesenwetter, 1852. Zootaxa, 4778 (3), 546–560.
https://doi.org/10.11646/zootaxa.4778.3.6
Pic, M. (1911) Trois nouveaux genres de Malacodermes Voisins de «Silis» Latr. L’Échange, Revue Linnéenne, 27 (313), 101–102.
Poinar, G.O. Jr. & Fanti, F. (2019) A new fossil soldier beetle (Coleoptera: Cantharidae) of the genus Cacomorphocerus Schaufuss, 1892 from Baltic amber. Palaeodiversity, 12 (1), 99–105.
https://doi.org/10.18476/pale.v12.a9
Schaufuss, C.F.C. (1892) Preussens Bernstein-Käfer. Neue Formen aus der Helm’schen Sammlung im Danziger Provinzialmuseum. Berliner Entomologische Zeitschrift, 36 (I), 53–64. [1891]