Amphibamidae

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Amphibamidae
Temporal range: Late
Ma
Possible descendant taxon Lissamphibia
survives to present.
Amphibamus grandiceps
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Order: †Temnospondyli
Clade: †Amphibamiformes
Family: †Amphibamidae
Moodie, 1909
Subgroups

See text.

Synonyms
  • Doleserpetontidae Bolt, 1969
  • Peliontidae Cope, MS

The Amphibamidae are an ancient

Early Permian strata in the United States.[1]

Classification

Amphibamidae has traditionally included small-bodied, terrestrial dissorophoids. The name is attributed to Moodie (1909),[2] but it was rarely used because it originally referred only to Amphibamus. Similar monogeneric families were also erected for other small, terrestrial dissorophoids (e.g., Doleserpetontidae), and most of the taxa now recognized as amphibamiforms were placed within the Dissorophidae.

Clack & Milner (1993) revived the Amphibamidae to include Amphibamus, Platyrhinops, Doleserpeton, and Tersomius[3]. Daly (1994) further expanded the composition of the Amphibamidae to include the newly described Eoscopus as well as the Early Triassic form Micropholis.[4] She suggested that the micromelerpetids were also amphibamids, which has not been validated by more recent workers. Subsequent phylogenetic work verified the monophyly of the Amphibamidae,[5] with recent analyses also recovering the branchiosaurids nested within the amphibamids.[6]

Schoch (2018) erected the new clade Amphibamiformes to include the traditional amphibamids and the nested branchiosaurids and subsequently restricted the Amphibamidae to two taxa: Doleserpeton annectens from the Dolese Brothers Limestone Quarry near Richards Spur, Oklahoma and Amphibamus grandiceps from Mazon Creek, Illinois. These taxa are united by several features, such as a medially expanded choana.

Phylogeny of amphibamiforms from Schoch (2018)

Xerodromes

[1]

Relationship to the Batrachia

The Amphibamidae have typically been recovered close to some or all of the lissamphibian crown. Until the description of Gerobatrachus, Doleserpeton was considered to be the closest extinct relative to the crown group.[7] Below is a modified cladogram from Anderson et al. (2008) showing Batrachia nested in the Amphibamidae, with Gerobatrachus as the sister taxon of Batrachia (anurans and caudates) and Doleserpeton and Amphibamus as successive outgroups:[7]

Amphibamidae 

There is continued debate over the origin of lissamphibians, including whether they are monophyletic or whether batrachians and caecilians are descended from different clades of tetrapods or temnospondyls.

lepospondyl origin, in which case amphibamids would not be closely related to any extant amphibians.[9]

References

  1. ^
    ISSN 0022-3360
    .
  2. doi:10.1086/621585
    .
  3. ^ Clack, Jennifer A.; Milner, Andrew R. (1993). "Platyrhinops from the Upper Carboniferous of Linton and Nyrany and the family Amphibamidae (Amphibia: Temnospondyli)". New Research on Permo-Carboniferous Faunas. 29: 185–191.
  4. ^ Daly, Eleanor (1994). "The Amphibamidae (Amphibia: Temnospondyli), with a description of a new genus from the Upper Pennsylvanian of Kansas". The University of Kansas Miscellaneous Publications. 85: 1–59.
  5. doi:10.1671/0272-4634(2005)025[0502:tamftl]2.0.co;2
    .
  6. S2CID 86207414
    .
  7. ^
    S2CID 205212809. Archived from the original
    (PDF) on 2015-06-26. Retrieved 2015-06-25.
  8. PMID 28630337
    .
  9. PMID 30631641
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Amphibamidae&oldid=1215041619"