Table 1 Comparative diagnostic table between paramacellodid squamates.
Dentition lábio-lingually expanded | Dentition with lingually, concave crowns | Dentition with posteriorly curved crowns | Dentition, tooth shape on lingual view | Dentition with accessory lingual cuspule | Dentition striated lingually | Dentition, anterolingual rotation | Dentary, dorsoventral depth posteriorly | Dentary, width of dental sulcus | Dentary, crista dentalis robust anteriorly | Dentary, crista dentalis sharply decreasing in height posteriorly | Dentary, thickness of ventral crest at posterior end of Meckelian canal | Splenial, anterior extension relative to the dentary | Maxilla, tall nasal process | Dorsal vertebrae, midventral crest develop-ment | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Neokotus sanfranciscanus | Present | Present | Absent | Conical (narrow) | Absent | ? | Absent | Short | Narrow | Present | Absent | Robust | Posterior | ? | Strong |
Paramacellodus oweni | Present | Present | Absent | Conical (narrow) | Absent | Present | Absent | Short | Narrow | Present | Present | Thin | Anterior | Present | Mild |
Paramacellodus sinuosus | Present | Present | Absent | Conical (acute apex) | Absent | Present | Present | Short | ? | Present | Absent | Thin | ? | ? | ? |
Paramacellodus marocensis | Present | Present | Absent | Conical (narrow) | Absent | Present | Absent | Short | ? | Present | Present | Thin | Posterior? | ? | ? |
Paramacellodus keebleri | Present | Present (mild) | Absent | Chisel -shaped | Absent | Present | Absent | ? | ? | ? | ? | ? | ? | Present | ? |
Pseudosaurillus | Present | Present (mild) | Absent | Conical (narrow) | Absent | Present | Absent | Short | Wide | Present | Present | Thin | Anterior | Absent | ? |
Saurillus obtusus | Present | ? | Absent | Conical (narrow) | Absent | Present | Absent | Short | Narrow | Present | Present | Robust | ? | ? | ? |
Saurillodon | Present | Present (mild) | Present | Conical (wide) | Absent | Absent | ? | Deep | Narrow | Present | ? | Thin | ? | ? | ? |
Becklesius hoffstetteri | Present | Present (mild) | Absent | Chisel -shaped | Present | Present | Absent | Short | Wide | Present | Present | Thin | Mid-length | Present | ? |
Becklesius cataphractus | Present | Present (mild) | Absent | Chisel -shaped | Present | Present | Absent | Short | ? | Present | ? | Thin | Mid-length | Present | ? |
Atokasaurus | Present | Present | Absent | Chisel -shaped | Present | Absent | Absent | ? | Wide | Absent? | ? | Thin | ? | ? | ? |
