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Albanerpeton gracilis
Taxonomy
Albanerpeton gracilis was named by Gardner (2000). Its type specimen is RTMP 95.181.70, a partial skull (left premaxilla), and it is a 3D body fossil. Its type locality is RTMP L0410, which is in a Campanian terrestrial horizon in the Dinosaur Park Formation of Canada.
It was corrected as Albanerpeton gracile by Gardner and Böhme (2008).
It was corrected as Albanerpeton gracile by Gardner and Böhme (2008).
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Albanerpeton gracilis Gardner p. 375 |
| 2003 | Albanerpeton gracilis Gardner et al. p. 315 |
| 2005 | Albanerpeton gracilis Venczel and Gardner |
| 2008 | Albanerpeton gracile Gardner and Böhme p. 179 |
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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.
†Albanerpeton gracilis Gardner 2000
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. D. Gardner 2000 | Moderate-sized species of Albanerpeton having no recognizable autapomorphies, but differing from all congeners in a unique combination of primitive and derived character states. Differs from A. arthridion and shares with all Late Cretaceous and Tertiary congeners two premaxillary synapomorphies: suprapalatal pit low on pars dorsalis and larger, ranging from about four to 25% of lingual area of pars dorsalis depending on the species. Primitively resembles A. galaktion and A. cifellii and differs from A. nexuosus, A. inexpectatum, and unnamed Paleocene species in having premaxilla more gracile in build, paired, and with pars dorsalis relatively taller and less strongly sutured dorsally with nasal, in having maxilla (unknown for A. cifellii) with relatively longer premaxillary lateral process, and in having frontals (unknown for A. cifellii) with internasal process relatively broader and acute in dorsal or ventral outline; convergently resembles Tertiary congeners in having anterior end of tooth row on maxilla approximately in line with leading edge of nasal process. Most closely resembles A. galaktion and A. cifellii in one premaxillary synapomorphy, suprapalatal pit triangular to slit-like in lingual outline, but primitively differs from former species in retaining moderate-sized suprapalatal pit and smaller palatal foramen and from latter species in lacking facet and dorsally expanded lateral internal strut on lingual face of premaxillary pars dorsalis for contact with nasal. |