Late Oligocene fishes (Chondrichthyes and Osteichthyes) from the Catahoula Formation in Wayne County, Mississippi, USA DOI Creative Commons
David J. Cicimurri, Jun A. Ebersole, Gary L. Stringer

et al.

European Journal of Taxonomy, Journal Year: 2025, Volume and Issue: 984, P. 1 - 131

Published: March 28, 2025

Isolated elasmobranch and teleost teeth, jaws, otoliths, scales, vertebrae, fin spines were recovered from the upper Oligocene (Chattian) Catahoula Formation in Wayne County, Mississippi, USA. A total of 13 551 specimens examined 12 340 these identified at least to ordinal level. These remains represent 49 unequivocal fish taxa, viz. 29 elasmobranchs 20 teleosts. The 3614 indicate that Carcharhiniformes is most diverse group Elasmobranchii, with taxa belonging five families. Orectolobiformes Lamniformes are represented by far fewer (three four, respectively). Carcharhinus acuarius (Probst, 1879) constitutes 49% number shark teeth our sample. Ten batoids have been within Myliobatiformes (seven taxa) Rhinopristiformes taxa). Partial durophagous myliobatids genera) abundant batoid remains, constituting 41% ray fossils. However, Dasyatidae Rhynchobatus cf. pristinus 1877) 36.5% 15.4%, respectively, identified. Herein, we erect new including Galeocerdo platycuspidatum sp. nov., Hemipristis intermedia Hypanus? heterodontus “Sphyrna” gracile robustum nov. sample includes over 9935 fossils, which 73% Nine bony solely jaw elements, or spines. Although otoliths much less common than other identifiable (409 versus roughly 8430, respectively), they allowed us identify four not known skeletal remains. Albulidae, Sciaenidae, Sparidae isolated but could ascertain whether various elements conspecific otolith-based species Sciaenidae (teeth, otoliths) dominate assemblage, 70% Our first occurrence Tetraodontidae Western Hemisphere. vertebrate assemblage study site indicates an estuarine depositional environment, consistent previous interpretations based on lithology. At disconformably overlies Paynes Hammock Limestone, believe disconformable contact locally represents Rupelian (early Oligocene)/Chattian (late Oligocene) boundary. fauna described herein therefore Chattian age.

Language: Английский

Late Oligocene fishes (Chondrichthyes and Osteichthyes) from the Catahoula Formation in Wayne County, Mississippi, USA DOI Creative Commons
David J. Cicimurri, Jun A. Ebersole, Gary L. Stringer

et al.

European Journal of Taxonomy, Journal Year: 2025, Volume and Issue: 984, P. 1 - 131

Published: March 28, 2025

Isolated elasmobranch and teleost teeth, jaws, otoliths, scales, vertebrae, fin spines were recovered from the upper Oligocene (Chattian) Catahoula Formation in Wayne County, Mississippi, USA. A total of 13 551 specimens examined 12 340 these identified at least to ordinal level. These remains represent 49 unequivocal fish taxa, viz. 29 elasmobranchs 20 teleosts. The 3614 indicate that Carcharhiniformes is most diverse group Elasmobranchii, with taxa belonging five families. Orectolobiformes Lamniformes are represented by far fewer (three four, respectively). Carcharhinus acuarius (Probst, 1879) constitutes 49% number shark teeth our sample. Ten batoids have been within Myliobatiformes (seven taxa) Rhinopristiformes taxa). Partial durophagous myliobatids genera) abundant batoid remains, constituting 41% ray fossils. However, Dasyatidae Rhynchobatus cf. pristinus 1877) 36.5% 15.4%, respectively, identified. Herein, we erect new including Galeocerdo platycuspidatum sp. nov., Hemipristis intermedia Hypanus? heterodontus “Sphyrna” gracile robustum nov. sample includes over 9935 fossils, which 73% Nine bony solely jaw elements, or spines. Although otoliths much less common than other identifiable (409 versus roughly 8430, respectively), they allowed us identify four not known skeletal remains. Albulidae, Sciaenidae, Sparidae isolated but could ascertain whether various elements conspecific otolith-based species Sciaenidae (teeth, otoliths) dominate assemblage, 70% Our first occurrence Tetraodontidae Western Hemisphere. vertebrate assemblage study site indicates an estuarine depositional environment, consistent previous interpretations based on lithology. At disconformably overlies Paynes Hammock Limestone, believe disconformable contact locally represents Rupelian (early Oligocene)/Chattian (late Oligocene) boundary. fauna described herein therefore Chattian age.

Language: Английский

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