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Kawasphenodon expectatus
Taxonomy
Kawasphenodon expectatus was named by Apesteguía (2005). Its type specimen is MACN Pv RN1098, a mandible (left lower jaw), and it is a 3D body fossil. Its type locality is Los Alamitos vertebrates, middle section, which is in a Campanian/Maastrichtian lacustrine - large siltstone/sandstone in the Los Alamitos Formation of Argentina. It is the type species of Kawasphenodon.
Synonymy list
| Year | Name and author |
|---|---|
| 2005 | Kawasphenodon expectatus Apesteguía p. 664 figs. 2, 3a |
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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.
†Kawasphenodon expectatus Apesteguía 2005
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Apesteguía 2005 | Kawasphenodon differs from other sphenodontians in having a distinct, deep and single groove on the posterior side of the adult or additional teeth. Additionally, it bears the following unique combination of features: large size; robust, strongly curved, lower jaw, with sculptured ventral and labial aspects; jaw depth larger in the posterior region and much lower in the edentulous anterior region; teeth restricted in the adult forms to the last part of the jaw, with an extensive edentulous mid and anterior region; lower jaw teeth out of the midline; square-based additional teeth; antero-labial flanges subequal or slightly larger than antero-lingual ones; teeth with few, mostly two deep and wide lingual grooves and, when present, fine, dense labial grooves; strongly concave anterior side of the additional teeth, going the tip beyond the base of the tooth in new, unworn teeth. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Age range: base of the Late/Upper Campanian to the top of the Early/Lower Maastrichtian or 83.50000 to 66.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian - Early/Lower Maastrichtian | Argentina (Río Negro) | Kawasphenodon expectatus (type locality: 45087) |