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Eromangasaurus
Taxonomy
Eromangasaurus was named by Kear (2005). Its type is Eromangasaurus carinognathus.
It was assigned to Elasmosauridae by Kear (2007), Ketchum and Benson (2010), Benson and Druckenmiller (2014) and O'Gorman (2019).
It was assigned to Elasmosauridae by Kear (2007), Ketchum and Benson (2010), Benson and Druckenmiller (2014) and O'Gorman (2019).
Species
E. australis, E. carinognathus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2005 | Eromangasaurus Kear pp. 244-245 |
| 2007 | Eromangasaurus Kear pp. 244-245 figs. 1, 2 |
| 2010 | Eromangasaurus Ketchum and Benson p. 15 |
| 2014 | Eromangasaurus Benson and Druckenmiller |
| 2019 | Eromangasaurus O'Gorman |
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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.
G. †Eromangasaurus Kear 2005
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†Eromangasaurus australis Sachs 2005
†Eromangasaurus carinognathus Kear 2005
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. P. Kear 2007 | Diagnosis follows Kear (2005a) with additional characters from Sachs (2005a). An elasmosaurid plesiosaur uniquely distinguished by the presence of seven premaxillary teeth (four left, three right) and an elongate (enforced sensu O'Keefe, 2001) mandibular symphysis that bears a prominent keel along its posteroventral midline. In addition, the taxon displays a combination of characters variably developed in other elasmosaurids. These include contact between the dorsomedial process of the premaxilla and anterior extension of the parietal; premaxilla with prominent dorsomedian keel, temporal fenestra margin that lacks an obvious contribution from the frontal; pineal foramen probably present but not bordered by the frontal; absence of a squamosal-postorbital contact; jugal lacking an obvious contribution to the narrow bar between the orbit and temporal emargination; quadrate flange of the pterygoid being in contact with both the quadrate and squamosal; pterygoids in contact posterior to the posterior interpterygoid vacuity but are covered by the posterior parasphenoid process; parasphenoid being narrow and keeled along its exposed posterior length; anterior portion of the Meckelian canal closed over; mandibular symphysis formed by the dentaries only; coronoid that lacks obvious exposure on the lateral surface of the mandible; caniniform teeth being present on the maxilla; and a short, high atlas-axis complex (sensu Sachs 2005a) with a single-headed axial rib whose base is confined to the axis centrum. |