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Showing results for tags 'prolebias'.
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Alternative name: Prolebias meridionalis Gaudant, 1987. Diagnosis (after Costa, 2012): “Similar to other cyprinodontids by having: jaw dentition comprising single outer tooth row followed or not by few smaller teeth near symphyses; anterior and posterior portions of jaw suspensorium nearly parallel. Also similar to cyprinodontids by largest specimens being deep-bodied (body depth about 28–30 % standard length, vs. about 21 –26 % standard length in other Oligocene killifish taxa). It differs from all other cyprinodontids by having long, almost rectangular premaxillary ascending process, (vs. short, sharp, almost triangular), long proximal part of parhypural overlapping preural centrum 1 (vs. not overlapping), well-developed parietals (vs. absent), dentary not expanded ventrally (vs. expanded) and absence of distinctive groove on dorsal maxillary process (vs. presence).” Identified by oilshale according to Gaudant, 1978: Long, almost rectangular premaxillary ascending process, dorsal fin and anal with 16 Lepidotrichia, anal fin starting slightly behind the beginning of the dorsal fin, pectoral fin with 13 fin rays. References: Costa, Wilson J. E. M. (2012). Oligocene killifishes (Teleostei: Cyprinodontiformes) from southern France: relationships, taxonomic position, and evidence of internal fertilization. Vertebrate Zoology 62 (3), pp. 371–386. Gaudant, Jean (1978). Sur une nouvelle espèce de Poissons Téléostéens Cyprinodontiformes de l'Oligocène des environs de Manosque (Alpes-de-Haute-Provence). Géologie Méditerranéenne, 5-2, pp. 281-289. https://www.persee.fr/doc/geolm_0397-2844_1978_num_5_2_1050
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- chattian
- eurolebias
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Frequent incorrect spelling: P. goretti References: Wilson J. E. M. Costa (2012) The caudal skeleton of extant and fossil cyprinodontiform fishes (Teleostei: Atherinomorpha): comparative morphology and delimitation of phylogenetic characters. Vertebrate Zoology 62 (2) p.161 – 180. Frey, Linda, Maxwell, Erin E., and Sánchez-Villagra, Marcelo R. (2016) Intraspecific variation in fossil vertebrate populations: Fossil killifishes (Actinopterygii: Cyprinodontiformes) from the Oligocene of Central Europe. Palaeontologia Electronica 19.2.14A: 1-27.
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Alternative name: Pantanodon cephalotes Diagnosis from Gaudant 2013, p. 220: "Small cyprinodontiform fishes having a vertebral column composed of about 30 vertebrae, including 18-20 postabdominal vertebrae. Caudal fin paddle-shaped, 10-12 (14) branched rays; caudal endoskeleton with two separate hypural plates. Dorsal fin small: i-ii+I+ 6-9 rays (7-11 pterygiophores); anal fin large, beginning in front of the origin of dorsal fin, ii-iii+I+ 10-14 rays (13-16 pterygiophores, the first of them being slightly arched). Pectoral fins ventro-Iateral; 10-12 rays. Pelvic fins inserted in front of the middle of body, approximately at the level of the third pair of pleural ribs and nearer from the pectorals base than from the origin of the anal fin. Some specimens, which are interpreted as males, show modified fin rays, ending in claw-like articles." References: Wilson J. E. M. Costa. The caudal skeleton of extant and fossil cyprinodontiform fishes (Teleostei: Atherinomorpha): comparative morphology and delimitation of phylogenetic characters. Vertebrate Zoology 62 (2) 2012. p. 161 – 180. Gaudant, Jean 2013. Occurrence of poecilid fishes in the European Oligocene - Miocene: The genus Paralebias nov. gen. Neues Jahrbuch für Geologie und Paläontologie Abhandlung 267, p. 215-222. Frey, Linda, Maxwell, Erin E., and Sánchez-Villagra, Marcelo R. 2016. Intraspecific variation in fossil vertebrate populations: Fossil killifishes (Actinopterygii: Cyprinodontiformes) from the Oligocene of Central Europe. Palaeontologia Electronica 19.2.14A: 1-27.
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- aix-en-provence
- oligocene
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From the album: Vertebrates
Prolebias goreti Sauvage, 1880 Oligocene Stampian Céreste France-
- céreste
- haute provence
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