| Obaichthyidae Temporal range:
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| Fossil of Obaichthys decoratus | |
Scientific classification
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Clade: | Ginglymodi |
| Order: | Lepisosteiformes |
| Superfamily: | Lepisosteoidea |
| Family: | †
Obaichthyidae Grande, 2010 |
| Genera | |
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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] Afrocascudo, initially described as the earliest known armored catfish, might represent a juvenile obaichthyid, possibly a junior synonym of Obaichthys, [4] though this has been disputed based on the complete ossification of the bones indicating full maturity and the absence of important holostean characters. [5]
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] [6] 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. [7]
References
- ^ a b 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.
- ^ 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.
- ^ a b 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.
- ^ Britz, R.; Pinion, Amanda K.; Kubicek, Kole M.; Conway, Kevin W. (2024). "Comment on "A Saharan fossil and the dawn of Neotropical armoured catfishes in Gondwana" by Brito et al". Gondwana Research. doi: 10.1016/j.gr.2024.06.014.
- ^ Brito, Paulo M.; Dutheil, Didier B.; Keith, Philippe; Carnevale, Giorgio; Meunier, François J.; Khalloufi, Bouziane; Gueriau, Pierre (2024). "A reply to a comment on Brito et al., 2024, A Saharan fossil and the dawn of the Neotropical armoured catfishes in Gondwana by Britz, Pinion, Kubicek and Conway". Gondwana Research. doi: 10.1016/j.gr.2024.06.013.
- ^ 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.
- ^ 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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