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Showing results for tags 'ponte giurino'.
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Taxonomy from Fossilworks.org. Genus Diagnosis by Bartram 1977, p.163: " Small macrosemiid fishes, the trunk tapering gradually to form a broad caudal peduncle; skull roof bearing genuine; gape small, the quadrate articulation lying beneath the anterior part of the orbit; dentigerous expansion of maxilla with upper and lower borders straight and diverging posteriorly, hind border also straight and perpendicular to oral border, bearing about 13 small, closely—set teeth; mandible with dentary bearing about 12 closely-set teeth, coronoid teeth rounded; leading edge of preopercular forming sharp angle; abdomina] vertebrae forming thin cylinders, notochord unconstricted; pectoral fin with about 15 rays, leading ray reduced to unpaired splint, no fringing fulcra; pelvic fin formed by five rays preceded by basa] and fringing fulcra; anal fin with seven rays, base compact; caudal fin weakly forked, axial lobe bearing five rays; dorsal fin single and long, preceded by basal and fringing fulcra, outline high anteriorly, convex posteriorly; region immediately on either side of dorsal fin devoid of scales; scales rhomboid." Species Diagnosis by Bartram 1977, p.164: "Legnonotus with about 25 dorsal fin-rays; dentary teeth tall and sharp." Line drawing from Bartram 1977, p. 164: 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. Tintori, A. and Renesto, S. (1983) The Macrosemiidae (Pisces, Actinopterygii) from the Upper Triassic of Lombardy (N. Italy). Rivista Italiana di Paleontologia e Stratigrafia 89(2):209-222.