Abstract
Hemicoelus favonii sp. nov. is described and illustrated from Eocene Baltic amber. This new fossil species differs from extant congeners in having 11-segmented antennae; a metathoracic ventrite with large impression in its anterior portion; a pronotum distinctly narrower than the elytral base region; the posterior suture of abdominal ventrite 1 weakly arcuate medially; sharp lateral pronotal margins that are incomplete and distinct in their basal half only; elytral striae that are not grouped in pairs; posterior pronotal angles that are rounded; elytral intestriae 3, 5, 7 and 9 that are distinctly convex; and a comparatively small total body size. The presence of Hemicoelus in Baltic amber suggests that moist, rotting wood was available as a microhabitat in the ancient forest. Beyond the new species description, the systematic placement of Anobium jacquelinae Hawkeswood, Makhan & Turner is discussed. A new fossil record for Microbregma waldwico Bukejs & Alekseev, and the first report of the genus Trichodesma LeConte from Eocene Baltic amber are also presented.
References
Alekseev, V.I. (2017) Coleoptera from the middle-upper Eocene European ambers: generic composition, zoogeography and climatic implications. Zootaxa, 4290 (3), 401–443.
https://doi.org/10.11646/zootaxa.4290.3.1Alekseev, V.I. & Alekseev, P.I. (2016) New approaches for reconstruction of the ecosystem of an Eocene amber forest. Biology Bulletin, 43 (1), 75–86.
https://doi.org/10.1134/S1062359016010027Arango, R.A. & Young, D.K. (2012) Death-watch and spider beetles of Wisconsin—Coleoptera: Ptinidae. General Technical Report FPL-GTR-209. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI, 158 pp.
Bukejs, A. & Alekseev, V.I. (2015) A second Eocene species of death-watch beetle belonging to the genus Microbregma Seidlitz (Coleoptera: Bostrichoidea) with a checklist of fossil Ptinidae. Zootaxa, 3947 (4), 553–562.
https://doi.org/10.11646/zootaxa.3947.4.6Hawkeswood, T.J., Makhan, D. & Turner, J.R. (2009) Anobium jacquelinae sp. nov., a new wood-boring beetle (Coleoptera: Anobiidae) from Baltic Amber. Giornale Italiano di Entomologia, 12, 181–187.
Ehnström, B. & Axelsson, R. (2002) Insektsgnag i bark och ved. ArtDatabanken, SLU, Uppsala, 512 pp.
Español, F. (1966) Notas sobre anóbidos (Coleoptera). XVII. Las Trichodesma del África tropical. Eos, 41 (2–3), 215–222.
Kuśka, A. (1992) Three new species of beetles (Coleoptera: Cantharidae, Anobiidae, Curculionidae) from the Baltic amber. Annals of the Upper Silesian Museum—Entomology, 3, 107–113.
Logvinovskij, V.D. (1985) Family Anobiidae. In: Skarlato, O.A (Ed.), Fauna SSSR. Coleoptera. XIV (2). Nauka, Leningrad, pp. 1–175. [in Russian]
Logvinovskij, V.D. (1992) Family Anobiidae. In: Ler, P.A. (Ed.), Guides to Insects of Far East of SSSR. Vol. 3. Beetles or Coleoptera. Part 2. Nauka, St. Petersburg, pp. 61–71. [in Russian]
Peck, S.B. (2005) A checklist of the beetles of Cuba with data on distributions and bionomics
(Insecta: Coleoptera). Arthropods of Florida and neighboring land areas. Vol. 18. Florida Department of Agriculture and Consumer Services, Gainesville, pp. 1–241.
Sakai, M. (2005) Trichodesma michioi (Coleoptera, Anobiidae, Anobiinae), a new anobiid species from the Ryukyus, Japan. Elytra, 33 (1), 42–46.
Suomi, D.A. & Akre, R.D. (1992) Characteristics of structures attacked by the wood-infesting beetle, Hemicoelus gibbicollis (Coleoptera: Anobiidae). Journal of the Entomological Society of British Columbia, 89, 63–70.
Terekhova, V.V. & Drogvalenko, A.N. (2011) Ptinid beetles (Coleoptera, Ptinidae) in the fauna of Ukraine. Subfamily Anobiinae. Proceedings of Zoological Museum, 42, 58–74. [in Russian]
Toskina, I.N. (2004) About genera Anobium Fabricius, 1775, and Cacotemnus LeConte, 1861 (Coleoptera: Anobiidae). Russian Entomological Journal, 13 (1–2), 53–68.
Viñolas, A. & Masó, G. (2007) Nuevas especies de los géneros Trichodesma LeConte, 1861 y Gastrallus Jacquelin du Val, 1860, del África Austral (Coleoptera, Anobiidae). Animal Biodiversity and Conservation, 30 (1), 53–70.
White, R.E. (1976) Eight new North American species of Anobiidae with keys and notes (Coleoptera). Proceedings of the Entomological Society of Washington, 78, 154–170.
White, R.E. (1982) A Catalog of the Coleoptera of America North of Mexico. Family Anobiidae. U.S. Department of Agriculture, Washington, D.C., 58 pp.
Wysokinski, T.W., Chapman, D., Adams, G., Renier, M., Suortti, P. & Thomlinson W. (2015) Beamlines of the biomedical imaging and therapy facility at the Canadian Light Source-Part 3. Nuclear Instruments and Methods in Physics Research A, 775 (1), 1–4.
https://doi.org/10.1016/j.nima.2014.11.088Zahradník, Р. (2007) Family Рtinidae. In: Löbl, I. & Smetana, A. (Eds.), Catalogue of Palaearctic Coleoptera. Vol. 4. Apollo Books, Stenstrup, pp. 328–362.
Zahradník, P. & Háva, J. (2014a) New Ptinidae (Coleoptera: Bostrichoidea) from Baltic amber with a list of known fossil species. Studies and Reports Taxonomical Series, 10, 629–646.
Zahradník, P. & Háva, J. (2014b) Catalogue of the world genera and subgenera of the superfamilies Derodontoidea and Bostrichoidea (Coleoptera: Derodontiformia, Bostrichiformia). Zootaxa, 3754 (4), 301–352.
https://doi.org/10.11646/zootaxa.3754.4.1