Ever had the sneaking suspicion that there’s something in the toilet ready and waiting to strike at your bits? Not something most of us think about anymore, unless living in a place with local wildlife that have a general indifference to the presence of humans. That being said, there was once a creature that remained undetected at the bottom of rivers opening its toilet-seat-shaped head whenever something tasty swam by. You wouldn’t make the mistake of taking a seat on this thrown though, as Gerrothorax would surely take the opportunity to take a chunk out of you.
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RESEARCH
Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 53. ISBN 978-1-84028-152-1
Nilsson, Tage (13 February 1946). "A new find of Gerrothorax rhaeticus Nilsson, a plagiosaurid from the Rhaetic of Scania" (PDF). Lunds Universitets årsskrift. 42 (10)
Schoch, Rainer R.; Witzmann, Florian (2010-06-18). "Bystrow's Paradox - gills, fossils, and the fish-to-tetrapod transition" (PDF). Acta Zoologica. 92 (3): 251-265. doi:10.1111/j.1463-6395.2010.00456.x. ISSN 0001-7272
Farish A. Jenkins, Jr.; Neil H. Shubin; Stephen M. Gatesy; Anne Warren (2008). "Gerrothorax pulcherrimus from the Upper Triassic Fleming Fjord Formation of East Greenland and a reassessment of head lifting in temnospondyl feeding". Journal of Vertebrate Paleontology. 28 (4): 935-950. doi:10.1671/0272-4634-28.4.935
F. Witzmann; R. R. Schoch; A. Hilger; N. Kardjilov (2011). "Braincase, palatoquadrate and ear region of the plagiosaurid Gerrothorax pulcherrimus from the Middle Triassic of Germany". Palaeontology. 55 (1): 35-50. doi:10.1111/j.1475-4983.2011.01116.x
Witzmann, Florian; Schoch, Rainer R. (27 December 2012). "Reconstruction of cranial and hyobranchial muscles in the triassic temnospondyl Gerrothorax provides evidence for akinetic suction feeding". Journal of Morphology. 274 (5): 525-542. doi:10.1002/jmor.20113. ISSN 0362-2525
R. R. Schoch; F. Witzmann (2011). "Cranial morphology of the plagiosaurid Gerrothorax pulcherrimus as an extreme example of evolutionary stasis". Lethaia. 45 (3): 371-385. doi:10.1111/j.1502-3931.2011.00290.x
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Video Sections
00:00-00:53 - Intro
00:53-07:43 - Gerrothorax Discovery
07:43-08:26 - How Big Was It?
08:26-13:26 - Gerrothorax Biology
13:26-14:54 - Gerrothorax Behavior
14:54-17:11 - Gerrothorax Ecology
17:11-18:40 - Gerrothorax Phylogeny
18:40-20:32 - Outro