Myobradypterygius

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Myobradypterygius
Temporal range:
Ma
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: †Ichthyosauria
Family: †Ophthalmosauridae
Genus: †Myobradypterygius
von Huene, 1927
Type species
†Myobradypterygius hauthali
von Huene, 1927
Synonyms

Myobradypterygius is an extinct genus of

ichthyosaur from the Early Cretaceous (Barremian-Hauterivian) of Argentina[1] and possibly also Chile.[2] One species is known, M. hauthali,[3] which was once believed to have been a species of Platypterygius.[4]

Discovery and naming

The holotype, MLP 79-I-30-2, a vertebral column and forelimbs, was discovered at the beginning of the 20th century by R. Hauthal at Nevado de Famatina, Argentina.[1] The specimen was first described by von Huene (1925) and he reconstructed the forelimb, and described it as being related to Myopterygius (now Pervushovisaurus).[5]

A second specimen, MLP 79-I-30-1, which included a left humerus and a forefin, was described by von Huene (1927) and in the same paper, both specimens were believed to belong to the same species, which was named Myobradypoterygius hauthali.[3]

A second species, M. mollensis, was named by Rusconi (1938) on the basis of specimen MHN-PV 106, a set of vertebrae found in the Los Molles Formation of Argentina,[6] but it has since been synonymised with Platypterygius and was not mentioned in the 2024 reappraisal of the genus.

McGowan (1972) synonymised M. hauthali with Platypterygius and created the new name Platypterygius hauthali.[4]

Stinnesbeck et al. (2014) described around forty ichthyosaur specimens from the Zapata Formation of Chile,[2] several of which had previously been assigned to Platypterygius,[7] and assigned several of the specimens to what would later become Myobradyopterygius hauthali.[8]

Fernández and Aguirre-Urreta (2005) reviewed the holotype and were the first to determine that it did not belong to Platypterygius.[9] Campos et al. (2024) reinstated the genus Myobradyopterygius as separate from Platypterygius.[1]

Classification

In 1925, Myobrachyopterygius was classified as being similar to Perushovisaurus.[5] In 1972, it was allied with Platypterygius,[4] and in 2024, Myobrachyopterygius was classified within Ophthalmosauridae.[1]

References

  1. ^
    doi:10.1016/j.cretres.2023.105818
    .
  2. ^
    ISSN 0016-7606
    .
  3. ^ a b Huene, F. von. (1927). Beitrag zur Kenntnis mariner mesozoischer Wirbeltiere in Argentinien. Centralblatt ftr Mineralogie, Geologie und Paldiontologie, B 1927:22-29.
  4. ^ a b c McGowan, C. (1972). The systematics of Cretaceous ichthyosaurs with particuliar reference to the material from North America. Contributions to Geology. 1972;11:9–29.
  5. ^ a b Huene, F. von. (1925). Ichthyosaurier aus der Kreide Argentiniens. Revista del Museo de La Plata 28:234-238.
  6. ^ C. Rusconi. (1938). Restos de ictiosaurios del Jurásico Superior de Mendoza [Remains of ichthyosaurs from the Upper Jurassic of Mendoza]. Boletin Paleontológico de Buenos Aires 10:1-4
  7. ISSN 0883-1351
    .
  8. ^ Páramo Fonseca, María Eurídice. (2018). Restos apendiculares de un ictiosaurio oftalmosáurido del Barremiano inferior de Villa de Leiva, Colombia. Boletín de Geología 40. 15–30. Accessed 2019-02-06.
  9. ISSN 0272-4634
    .
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