Obaichthyidae

Obaichthyidae

Obaichthyidae

Extinct family of ray-finned fishes

Obaichthyidae is an extinct family of ginglymodian ray-finned fish that lived in what is now Africa and South America during the Cretaceous period (Aptian–Cenomanian ages). It was erected in 2010 by Lance Grande to include the genera Dentilepisosteus and Obaichthys.[1][2] In 2012, it was defined as a stem-based taxon containing all taxa more closely related to Obaichthys than to the genera Lepisosteus, Pliodetes or Lepidotes.[3]

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Obaichthyids were close relatives of the modern gars of the family Lepisosteidae, with the two groups making up the superfamily Lepisosteoidea.[3] They are also known as spiny gars, referencing their close resemblance and relationship to modern gars, with one difference being their spiny scales.[1][4] They also differ from extant gars in their highly specialized jaws, with a prominent overbite, teeth concentrated at the tip, and a very small gape, indicating that they likely fed on small invertebrates, in contrast to all lepisosteids which are adapted to feed on other vertebrates.[5]

References

  1. [1]
    Grande, Lance (2010). "An Empirical Synthetic Pattern Study of Gars (lepisosteiformes) and Closely Related Species, Based Mostly on Skeletal Anatomy. the Resurrection of Holostei". Copeia. 2010 (2A): iii–871. ISSN 0045-8511. JSTOR 20787269.
  2. [2]
    Brito, P. M.; Lindoso, R. M.; Carvalho, I. S.; de Paula Machado, G. (2016). "Discovery of †Obaichthyidae gars (Holostei, Ginglymodi, Lepisosteiformes) in the Aptian Codó Formation of the Parnaíba Basin: Remarks on paleobiogeographical and temporal range". Cretaceous Research. 59: 10–17. Bibcode:2016CrRes..59...10B. doi:10.1016/j.cretres.2015.10.017.
  3. [3]
    López-Arbarello, A. (2012). "Phylogenetic Interrelationships of Ginglymodian Fishes (Actinopterygii: Neopterygii)". PLOS ONE. 7 (7): e39370. Bibcode:2012PLoSO...739370L. doi:10.1371/journal.pone.0039370. PMC 3394768. PMID 22808031.
  4. [4]
    Cooper, Samuel L. A.; Gunn, James; Brito, Paulo M.; Zouhri, Samir; Martill, David M. (2023-11-01). "A new fully marine, short-snouted lepisosteid gar from the Upper Cretaceous (Turonian) of North Africa". Cretaceous Research. 151: 105650. Bibcode:2023CrRes.15105650C. doi:10.1016/j.cretres.2023.105650. ISSN 0195-6671. S2CID 259520870.
  5. [5]
    Cavin, Lionel; Boudad, Larbi; Tong, Haiyan; Läng, Emilie; Tabouelle, Jérôme; Vullo, Romain (2015-05-27). "Taxonomic Composition and Trophic Structure of the Continental Bony Fish Assemblage from the Early Late Cretaceous of Southeastern Morocco". PLOS ONE. 10 (5): e0125786. Bibcode:2015PLoSO..1025786C. doi:10.1371/journal.pone.0125786. ISSN 1932-6203. PMC 4446216. PMID 26018561.


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