FOSSIL IMPRINT • vol. 76 • 2020 • no. 1 • pp. 40–58 (formerly ACTA MUSEI NATIONALIS PRAGAE, Series B – Historia Naturalis) MORTALITY PROFILES OF CASTOR AND TROGONTHERIUM (MAMMALIA: RODENTIA, CASTORIDAE), WITH NOTES ON THE SITE FORMATION OF THE MID-PLEISTOCENE HOMININ LOCALITY BILZINGSLEBEN II (THURINGIA, CENTRAL GERMANY) WOLF-DIETER HEINRICH1, LUTZ CHRISTIAN MAUL2,* 1 Museum für Naturkunde – Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstraße 43, 10115 Berlin, Germany; e-mail:
[email protected]. 2 Senckenberg Forschungsstation für Quartärpaläontologie, Am Jakobskirchhof 4, Weimar, Germany; e-mail:
[email protected]. * corresponding author Heinrich, W.-D., Maul, L. C. (2020): Mortality profiles of Castor and Trogontherium (Mammalia: Rodentia, Castoridae), with notes on the site formation of the Mid-Pleistocene hominin locality Bilzingsleben II (Thuringia, Central Germany). – Fossil Imprint, 76(1): 40–58, Praha. ISSN 2533-4050 (print), ISSN 2533-4069 (on-line). Abstract: The Middle Pleistocene site Bilzingsleben II is well-known for its wealth of vertebrate and archaeological remains. Of particular importance is the record of Homo erectus bilzingslebenensis. Most palaeontologists consider the find horizon as a primary vertebrate deposit formed during human occupation, while some archaeologists attribute its formation to turbulent gravitational mass flows, inundation or a combination of both. Here we present mortality profiles of the beavers Castor and Trogontherium to provide further arguments to this controversial discussion. The mortality profiles ofCastor from Bilzingsleben II, Weimar-Ehringsdorf and Weimar-Taubach are largely identical indicating similar taphonomic filters that were effective in the formation of the find layers. Individuals, which were tentatively classified as suspected ±2–2½ year old beavers dominate by far in all three sites.