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Taxonomy from Taverne et al. 2015. Palaeobalistum gutturosum, originally described by Arambourg in 1954 from the Cenomanian deposits of Jebel Tselfat in Morocco, was doubtfully ranged in the genus Nursallia by PoyatoAriza & Wenz in 2002. Taverne et al. 2015 established the new genus Paranursallia for "Nursallia" gutturosa. Etymology. — From the Greek para, near, close to, and the generic name Nursallia. Diagnosis for the genus Paranursallia from Taverne et al. 2015, p. 2018: "Nursalliinae with a large head, a wide orbit and a very short snout. Paired broad prefrontals present. Short mesethmoid. Parasphenoid short and straight. Mandible triangular and as deep as long. Wide dermosphenotic. A large and deep “V”-shaped notch at the ventral junction between the skull and the cleithrum. First neural arches fused in a large synarcual articulated on the rear of the skull. First 7 or 8 neural spines autogenous. 27 to 30 vertebral segments before the epichordal series. Neural and haemal arches interlocked by two pre- and two postzygapophyses. Dorsal and anal fin with about 70 pterygiophores each." Line drawing of the head from Taverne et al. 2015, p. 223: Identified by Prof. L. Capasso, Università degli Studi G. d'Annunzio Chieti e Pescara, Italy. References: Arambourg C. (1954) Les poissons crétacés du Jebel Tselfat. Notes et mémoires du Service Géologique du Maroc, 118: 1-188. Poyato-Ariza F. J. & Wenz S. (2002) A new insight into pycnodontiform fishes. Geodiversitas 24 (1): 139-248. Taverne L., Layeb M., Layeb-Tounsi Y. & Gaudant J. (2015) Paranursallia spinosa n. gen., n. sp., a new Upper Cretaceous pycnodontiform fish from the Eurafrican Mesogea. Geodiversitas 37 (2): 215-227. http://dx.doi.org/10.5252/g2015n2a3 Capasso, L. (2020) SEGNALAZIONE DEL PICNODONTIFORME PARANURSALLIA GUTTUROSA (ARAMBOURG, 1954) NEI CALCARI DOLOMITICI DEL CRETACEO SUPERIORE DI GARA SBAA, MAROCCO SUDORIENTALE. Atti Mus. Civ. St. Nat. Trieste 61, p. 153-162.
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A couple of questions concerning these fish. Are all nursallia teeth characterized by the eight or so bumps on one side of the tooth? Did pycnodonts regularly shed their teeth? Most of the teeth I have found are hollowed out basally, which makes me think that they were shed, I have a few that look like they have remnants of jaw fragments attached, which makes me think that these teeth belonged in the mouth of a fish that had died. How do you tell the difference between pycnodontid and lepidotid teeth? Thanks!