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Showing results for tags 'propterus'.
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From the album: Vertebrates
Propterus elongatus Wagner, 1863 Upper Jurassic Tithonian (Malm zeta) Eichstätt Germany Length 21 cm / 8 inch -
Several Late Jurassic macrosemiids are known from the Solnhofen limestones, including at least Notagogus, Histionotus, Voelklichthys and two species of Propterus: P. elongatus and P. microstomus. Taxonomy from Fossilworks.org. Diagnosis from Bartram 1977, p.179: "Propterus reaching standard length of 150 mm, although most specimens are about half this size; mean proportions as percentage of standard length: head length 33 %, trunk depth 38 %, predorsal length 40 %, prepelvic length 60 %, preanal length 84%; fin-ray counts: D(ant.) 10-13, D(post.) 10-14, P 17, V 6, A 5, C 15; about 36 lateral line scales; scales thin; two lobes of dorsal fin separated by a gap; anterior dorsal fin outline concave; no fulcra on posterior dorsal fin; cauda] fin-ravs bifurcating a maximum of twice." Line drawing from Bartram 1977, p. 181: Identified by oilshale using Bartram 1977. References: Bartram, A.W.H. (1977) The Macrosemiidae, a Mesozoic family of Holostean fishes. Bulletin of the British Museum of Natural History (Geology), 29, 137-234. Gloria Arratia and Hans-Peter Schultze (2012): The macrosemiiform fish companion of the Late Jurassic theropod Juravenator from Schamhaupten, Bavaria, Germany. Fossil Record 15 (1) 2012, 5–25 / DOI 10.1002/mmng.201200001