Paraechinorhinus barnesi
Welton in Pfeil, 1983
Classification: Elasmobranchii Echinorhiniformes Echinorhinidae
Reference of the original description
Late Cretaceous and Cenozoic Squalomorphii of the Northwest Pacific Ocean. PhD, Univ. of California Berkeley, 553 p., 71 fig.
Late Cretaceous and Cenozoic Squalomorphii of the Northwest Pacific Ocean. PhD, Univ. of California Berkeley, 553 p., 71 fig.
Synonyms / new combinations and misspellings
Paraechinorhinus cf. barnesi
Paraechinorhinus cf. barnesi
Types
Paraechinorhinus barnesi
Holotype: LACM.: 116417; Paratype: LACM.: 115691; LACM.: 116423; LACM.: 116427; LACM.: 116424; LACM.: 116418; LACM.: 19458-19473; LACM.: 95476; LACM.: 95478; LACM.: 95483; LACM.: 116419-116422; LACM.: 116425-116426; LACM.: 116428-116459; LACM.: 116467-116470;
Paraechinorhinus barnesi
Holotype: LACM.: 116417; Paratype: LACM.: 115691; LACM.: 116423; LACM.: 116427; LACM.: 116424; LACM.: 116418; LACM.: 19458-19473; LACM.: 95476; LACM.: 95478; LACM.: 95483; LACM.: 116419-116422; LACM.: 116425-116426; LACM.: 116428-116459; LACM.: 116467-116470;
Description by Pollerspoeck, Juergen:
Benediktinerring 34, D-94569 Stephansposching; juergen.pollerspoeck@shark-references.comCitation: Paraechinorhinus barnesi Welton in Pfeil, 1983: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024
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Distribution Geographic
type locality: LACM Locality 3198, Lake Forest, El Toro, Orange County, California, USA [2517];
other localities: LACM Locality 1945, Leisure World, Laguna Hills, Orange County, California, USA[2517];
Distribution of Echinorhinidae show google map
type locality: LACM Locality 3198, Lake Forest, El Toro, Orange County, California, USA [2517];
other localities: LACM Locality 1945, Leisure World, Laguna Hills, Orange County, California, USA[2517];
Distribution of Echinorhinidae show google map
Distribution Strategraphy
Monterey Formation, Middle Miocene, Luisian [2517]; Monterey, Late Miocene, Clarendonian, Mohnian;
Monterey Formation, Middle Miocene, Luisian [2517]; Monterey, Late Miocene, Clarendonian, Mohnian;
Material
82 teeth (types), 20 teeth referred material (LACM 10490, 3 teeth; LACM 57027, 9 teeth; LACM 116460-116466, 7 teeth; LACM 116471, 1 tooth) [2517];
82 teeth (types), 20 teeth referred material (LACM 10490, 3 teeth; LACM 57027, 9 teeth; LACM 116460-116466, 7 teeth; LACM 116471, 1 tooth) [2517];
Description
Original diagnosis WELTON, 1979 (same as for the genus) [2517]: Echinorhinid with well developed dignathic and gradient monognathic heterodonty; disjunct monognathic heterodonty weak with upper and lower antero-laterals and one medial only in the lower antero-laterals and one medial only in the lower dental series; ontogenetic heterodonty indeterminate; mesial cusplets never well developed as Echinorhinus and usually absent; distal cusplets 0 to 1 but almost always absent; cusp of lower antero-laterals narrow based and very erect with strongly concave mesial edge and weakly convex and nearly vertical distal edge; blade short and apically convex in upper antero-laterals and usually meso-distally elongated and low in lowers; median tooth with erect symmetrical cusp situated in center of tooth; central axis of cusp situated over distal half of root in all antero-lateral teeth; transverse ridges and grooves in crown foot absent; lingual crown flexure strong with strongly recurved cusp apex; roots hexanchoid or Echinorhinus-1ike, tabular, rectangular, never bilobate and may become rounded basally on the mesial and distal ends as in Echinorhinus; lingual root face with poorly developed longitudinal protuberance below crown foot; central lingual foramen single, multiple, or absent; transverse groove single, multiple or absent and never continuous from central lingual foramen to basal edge of root.
Original diagnosis WELTON, 1979 (same as for the genus) [2517]: Echinorhinid with well developed dignathic and gradient monognathic heterodonty; disjunct monognathic heterodonty weak with upper and lower antero-laterals and one medial only in the lower antero-laterals and one medial only in the lower dental series; ontogenetic heterodonty indeterminate; mesial cusplets never well developed as Echinorhinus and usually absent; distal cusplets 0 to 1 but almost always absent; cusp of lower antero-laterals narrow based and very erect with strongly concave mesial edge and weakly convex and nearly vertical distal edge; blade short and apically convex in upper antero-laterals and usually meso-distally elongated and low in lowers; median tooth with erect symmetrical cusp situated in center of tooth; central axis of cusp situated over distal half of root in all antero-lateral teeth; transverse ridges and grooves in crown foot absent; lingual crown flexure strong with strongly recurved cusp apex; roots hexanchoid or Echinorhinus-1ike, tabular, rectangular, never bilobate and may become rounded basally on the mesial and distal ends as in Echinorhinus; lingual root face with poorly developed longitudinal protuberance below crown foot; central lingual foramen single, multiple, or absent; transverse groove single, multiple or absent and never continuous from central lingual foramen to basal edge of root.
Remarks
shark-references Species-ID=4619;
type species of Paraechinorhinus Welton in Pfeil (1983) p. 225 [1886] by original designation (Art. 68.2 ICZN);
valid after Pfeil (1983) p. 225 [1886];
shark-references Species-ID=4619;
type species of Paraechinorhinus Welton in Pfeil (1983) p. 225 [1886] by original designation (Art. 68.2 ICZN);
valid after Pfeil (1983) p. 225 [1886];
References
The fossil record of the Bramble-shark Echinorhinus (Echinorhiniformes, Echinorhinidae) in South America. Journal of South American Earth Sciences, 120, Article 104083
DOI: 10.1016/j.jsames.2022.104083
Diversity and paleoenvironmental implications of an elasmobranch assemblage from the Oligocene–Miocene boundary of Ecuador. PeerJ, 8, Article e9051
DOI: 10.7717/peerj.9051
Oldest evidence of bramble sharks (Elasmobranchii, Echinorhinidae) in the Lower Cretaceous of southeast France and the evolutionary history of orbitostylic sharks. (plus Supplementary data). Cretaceous Research, 35, 81–87
DOI: 10.1016/j.cretres.2011.11.021
Zahnmorphologische Untersuchungen an rezenten und fossilen Haien der Ordnungen Chlamydoselachiformes und Echinorhiniformes. Palaeo Ichthyologica, 1, 1–315
Late Cretaceous and Cenozoic Squalomorphii of the Northwest Pacific Ocean. PhD, Univ. of California Berkeley, 553 p., 71 fig.
The fossil record of the Bramble-shark Echinorhinus (Echinorhiniformes, Echinorhinidae) in South America. Journal of South American Earth Sciences, 120, Article 104083
DOI: 10.1016/j.jsames.2022.104083
Diversity and paleoenvironmental implications of an elasmobranch assemblage from the Oligocene–Miocene boundary of Ecuador. PeerJ, 8, Article e9051
DOI: 10.7717/peerj.9051
Oldest evidence of bramble sharks (Elasmobranchii, Echinorhinidae) in the Lower Cretaceous of southeast France and the evolutionary history of orbitostylic sharks. (plus Supplementary data). Cretaceous Research, 35, 81–87
DOI: 10.1016/j.cretres.2011.11.021
Zahnmorphologische Untersuchungen an rezenten und fossilen Haien der Ordnungen Chlamydoselachiformes und Echinorhiniformes. Palaeo Ichthyologica, 1, 1–315
Late Cretaceous and Cenozoic Squalomorphii of the Northwest Pacific Ocean. PhD, Univ. of California Berkeley, 553 p., 71 fig.
