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Eromangasaurus australis
Taxonomy
Tuarangisaurus australis was named by Sachs (2005). Its type specimen is QM F11050, a skull (Near-complete crushed skull and mandible), and it is a 3D body fossil. Its type locality is Yambore Creek, which is in an Albian marine horizon in the Toolebuc Formation of Australia.
It was recombined as Eromangasaurus australis by Kear (2007), O'Gorman (2019), Poropat et al. (2023).
It was recombined as Eromangasaurus australis by Kear (2007), O'Gorman (2019), Poropat et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Tuarangisaurus australis Sachs |
| 2005 | Tuarangisaurus australis Sachs |
| 2007 | Eromangasaurus australis Kear pp. 244-245 figs. 1, 2 |
| 2019 | Eromangasaurus australis O'Gorman |
| 2023 | Eromangasaurus australis Poropat et al. p. 152 |
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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.
†Eromangasaurus australis Sachs 2005
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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. |