|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|J. A. Clack 2002||Derived features include: narrow, steep-sided skull with orbit deeper than its width; massive tooth on maxilla about position 5 or 6; light dermal skull ornament; dorsal branch of mandibular lateral line running along surangular; very broad interclavicle with acutely angled lateral corners.
Primitive features include: grooved, denticulated parasphenoid; closed palate with denticulated surface; supratemporal-postparietal contact, fang pairs on vomers, palatines and ectopterygoids with a row of some smaller accessory teeth on each; row of coronoid teeth nearly continuous; at least some lateral lines in tubes through bone; rhachitomous vertebrae; no differentiated sacral neural arch, ilium with posterodorsal process and dorsal iliac blade.
Features of uncertain polarity include: supratemporal with deeply interdigitated suture to squamosal; small tabular with ‘button’ terminating in ornamented surface; steeply angled suspen- sorium with deeply excavated temporal notch, pronounced angle between skull table and cheek in transverse section; scapulocoracoid ossified in two portions; about 28 presacral vertebrae; trunk ribs with expanded distal flanges.
Collections (4 total)
|Time interval||Ma||Country or state||Original ID and collection number|
|Tournaisian - Visean||United Kingdom (Northern Ireland)||Occidens portlocki (173986)|
|Ivorian||United Kingdom (Scotland)||Pederpes finneyae (106270)|
|Visean||Australia (Queensland)||Ossinodus pueri (176119)|
|Asbian||USA (Iowa)||Whatcheeria deltae (68318)|