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Casatia thermophila
Taxonomy
Casatia thermophila was named by Bianucci et al. (2019). Its type specimen is MSNUP I-17602, a partial skull, and it is a 3D body fossil. Its type locality is Acrille quarry, which is in a Zanclean deltaic sandstone in Italy. It is the type species of Casatia.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Casatia thermophila Bianucci et al. p. 1 figs. Figs. 2-4 |
| 2022 | Casatia thermophila Merella et al. p. 231 |
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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.
†Casatia thermophila Bianucci et al. 2019
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Bianucci et al. 2019 | Specimen MSNUP I-17602 is unambiguously assigned to Monodontidae based on the presence of a medial exposure of the maxillae anterior and lateral to the external bony nares (Muizon, 1988). It differs from all other named mono- dontids by the following characters: (1) presence of a median depression anterior to the premaxillary sac fossae, formed by the depressed medial part of the two premaxillae; and (2) medial part of the premaxillary-maxillary suture not paralleling the ante- rolateral profile of the external bony nares, but rather diverging posterolaterally. It shares with Bohaskaia, Delphinapterus, and Denebola a ‘U’-shaped outline of the anterior margin of the exter- nal bony nares. It shares with Bohaskaia, Delphinapterus, and Haborodelphis the posterior end of the premaxillae reaching about the mid-level of the external bony nares. It shares with Delphinapterus a triangular shape of the nasals and a ‘U’-shaped outline of the anterior margin of the exposure of the maxillae medial to the premaxillae anterior to the external bony nares. It shares with Monodon the convex and inflated premaxillary sac fossae and the presphenoid bone completely filling the posterior portion of the mesorostral groove and dorsally not exceeding the level of the medial margin of the maxillae. | |
| M. Merella et al. 2022 | Casatia thermophila is assigned to Monodontidae based on the presence of i) a medial exposure of the maxillae anterior and lateral to the external bony nares and ii) a lateral lamina of the palatine that passes anterior to the posterolateral edge of the frontal groove (Muizon 1988). It differs from all other named monodontids by displaying the following characters: (1) presence of a flattened median depression, anterior to the premaxillary sac fossae and medial to the anteromedial sulci, formed by the depressed medial part of the two premaxillae; (2) medial part of the premaxillary-maxillary suture not paralleling the anterolateral profile of the exter- nal bony nares, but rather diverging posterolaterally; and (3) palatine bones greatly elongated anteroposteriorly. It shares with Bohaskaia, Delphinapterus and Denebola a ‘U’-shaped outline of the anterior margin of the external bony nares. It shares with Bo- haskaia, Delphinapterus and Haborodelphis the posterior end of the premaxillae reaching about the mid-level of the external bony nares. It shares with Bohaskaia and Denebola the palatines that do not contact each other medially and the maxillary dental alveoli that are small and closely spaced. It shares with Monodon and some specimens of Delphinapterus an antorbital notch that is deeply excavated medially. It shares with Delphinapterus a triangular shape of the nasals and a ‘U’-shaped outline of the anterior margin of the exposure of the maxillae medial to the premaxillae anterior to the external bony nares. It shares with Haborodelphis and with some specimens of Delphinapterus a bifurcated falciform process of the squamosal. It shares with Monodon the convex and inflated premaxillary sac fossae and the presphenoid bone completely filling the posterior portion of the mesorostral groove and dorsally not exceeding the level of the medial margin of the maxillae. |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Nowak 1991, Uhen 2004 | |||||