Published

2023-05-23

Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material

Dientes premaxilares anteriores procumbentes en Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidencia a partir de nuevo material

DOI:

https://doi.org/10.15446/esrj.v27n1.105689

Keywords:

Procumbent teeth, Stenorhynchosaurus, Pliosauridae, Colombia, Barremian (en)
Dientes procumbentes, Stenorhynchosaurus, Pliosauridae, Colombia, Barremiano (es)

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Authors

  • María Eurídice Páramo Universidad Nacional de Colombia, Departamento de Geociencias
  • Cristian David Benavides-Cabra Universidad Nacional de Colombia, Departamento de Geociencias https://orcid.org/0000-0001-6919-4163
  • Héctor Daniel Palma-Castro Universidad Nacional de Colombia, Departamento de Biología
  • Antonio José Castañeda-Gómez Julius-Maximilians Universität; Würzburg

A recently prepared fragment of the anterior end of a snout comprising occluded upper and lower jaws of a juvenile individual of Stenorhynchosaurus munozi Páramo-Fonseca et al., 2016 (Plesiosauria, Pliosauridae) is described herein. The specimen was found in the 1990s at Sutamarchán (Boyacá, Colombia), in Barremian beds of the Arcillolitas abigarradas Member of the Paja Formation. Its description provides hitherto unknown valuable morphological information on the species: dorsal anterior extension of the vomer, five premaxillary teeth (not four as was previously suggested), and anteriorly directed orientation of the first premaxillary alveolus (procumbent). New observations made on previously studied material corroborated the existence of procumbent anterior premaxillary teeth in the species. The presence of this trait highlights the close relationship of S. munozi with other early-diverging brachauchenines from the Lower Cretaceous of Russia.

Se describe un fragmento del extremo anterior de un hocico con la mandíbula ocluida, de un individuo juvenil de Stenorhynchosaurus munozi Páramo-Fonseca et al., 2016 (Plesiosauria, Pliosauridae) que fue preparado recientemente. El espécimen fue encontrado en la década de 1990 en Sutamarchán (Boyacá, Colombia), en capas barremianas del Miembro Arcillolitas abigarradas de la Formación Paja. Su descripción proporciona información morfológica valiosa, desconocida hasta ahora para la especie: vómer con extensión anterior dorsal; premaxilares con cinco dientes (no cuatro como fue sugerido previamente) y el primero orientado anteriormente (procumbente). Nuevas observaciones hechas en material previamente estudiado corroboraron la existencia de dientes premaxilares anteriores procumbentes en la especie. La presencia de este rasgo resalta la estrecha relación de S. munozi con otros brachauqueninos del Cretácico Inferior de Rusia derivados tempranamente.

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How to Cite

APA

Páramo, M. E., Benavides-Cabra, C. D., Palma-Castro, H. D. and Castañeda-Gómez, A. J. . (2023). Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material. Earth Sciences Research Journal, 27(1), 1–9. https://doi.org/10.15446/esrj.v27n1.105689

ACM

[1]
Páramo, M.E., Benavides-Cabra, C.D., Palma-Castro, H.D. and Castañeda-Gómez, A.J. 2023. Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material. Earth Sciences Research Journal. 27, 1 (May 2023), 1–9. DOI:https://doi.org/10.15446/esrj.v27n1.105689.

ACS

(1)
Páramo, M. E.; Benavides-Cabra, C. D.; Palma-Castro, H. D.; Castañeda-Gómez, A. J. . Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material. Earth sci. res. j. 2023, 27, 1-9.

ABNT

PÁRAMO, M. E.; BENAVIDES-CABRA, C. D.; PALMA-CASTRO, H. D.; CASTAÑEDA-GÓMEZ, A. J. . Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material. Earth Sciences Research Journal, [S. l.], v. 27, n. 1, p. 1–9, 2023. DOI: 10.15446/esrj.v27n1.105689. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/105689. Acesso em: 13 apr. 2025.

Chicago

Páramo, María Eurídice, Cristian David Benavides-Cabra, Héctor Daniel Palma-Castro, and Antonio José Castañeda-Gómez. 2023. “Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material”. Earth Sciences Research Journal 27 (1):1-9. https://doi.org/10.15446/esrj.v27n1.105689.

Harvard

Páramo, M. E., Benavides-Cabra, C. D., Palma-Castro, H. D. and Castañeda-Gómez, A. J. . (2023) “Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material”, Earth Sciences Research Journal, 27(1), pp. 1–9. doi: 10.15446/esrj.v27n1.105689.

IEEE

[1]
M. E. Páramo, C. D. Benavides-Cabra, H. D. Palma-Castro, and A. J. . Castañeda-Gómez, “Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material”, Earth sci. res. j., vol. 27, no. 1, pp. 1–9, May 2023.

MLA

Páramo, M. E., C. D. Benavides-Cabra, H. D. Palma-Castro, and A. J. . Castañeda-Gómez. “Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material”. Earth Sciences Research Journal, vol. 27, no. 1, May 2023, pp. 1-9, doi:10.15446/esrj.v27n1.105689.

Turabian

Páramo, María Eurídice, Cristian David Benavides-Cabra, Héctor Daniel Palma-Castro, and Antonio José Castañeda-Gómez. “Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material”. Earth Sciences Research Journal 27, no. 1 (May 23, 2023): 1–9. Accessed April 13, 2025. https://revistas.unal.edu.co/index.php/esrj/article/view/105689.

Vancouver

1.
Páramo ME, Benavides-Cabra CD, Palma-Castro HD, Castañeda-Gómez AJ. Procumbent anterior premaxillary teeth in Stenorhynchosaurus munozi (Plesiosauria, Pliosauridae), evidence from new material. Earth sci. res. j. [Internet]. 2023 May 23 [cited 2025 Apr. 13];27(1):1-9. Available from: https://revistas.unal.edu.co/index.php/esrj/article/view/105689

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CrossRef citations2

1. Sven Sachs, Daniel Madzia, Ben Thuy, Benjamin P. Kear. (2023). The rise of macropredatory pliosaurids near the Early-Middle Jurassic transition. Scientific Reports, 13(1) https://doi.org/10.1038/s41598-023-43015-y.

2. Cristian David Benavides-Cabra, María Eurídice Páramo-Fonseca, Héctor Daniel Palma-Castro, José Alejandro Narváez-Rincón, Maria Paula Ramos-Clavijo. (2023). Stratigraphic distribution of marine vertebrates of the arcillolitas abigarradas member (Paja Formation) from the Villa de Leiva – Sáchica - Sutamarchán region, Boyacá, Colombia. Earth Sciences Research Journal, 27(3), p.211. https://doi.org/10.15446/esrj.v27n3.108292.

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