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Sullivania
Taxonomy
Sullivania was named by Čerňanský et al. (2023).
It was replaced with Sullivanosaurus by Čerňanský et al. (2023).
It was assigned to Glyptosaurinae by Čerňanský et al. (2023).
It was replaced with Sullivanosaurus by Čerňanský et al. (2023).
It was assigned to Glyptosaurinae by Čerňanský et al. (2023).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Sullivania Čerňanský et al. |
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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. †Sullivania Čerňanský et al. 2023
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Čerňanský et al. 2023 | Glyptosaurine differing from all other Glyptosauridae in having unique pattern of irregular cephalic osteoderms covering the frontal where the first two anterior central osteoderms straddle the midline, and are coalesced or fused, narrow, anteroposteriorly elongate, leaf-shaped, reaching only slightly further anteriorly than the much larger, anteropos- teriorly elongated lateral osteoderm with rounded lateral margin. This is in a sharp contrast to several wide, chevron- shaped osteoderms in Gaultia (in Sullivania, only the second lateral left and right osteoderms appear expanded medially, having contact in the mid-line) and high and regular division of dermal armor into discrete hexagonal osteoderms in Placo- saurus, Stenoplacosaurus, Glyptosaurus, Paraglyptosaurus, Helo- dermoides, and Eoglyptosaurus. It is further distinguished from all other glyptosaurines by the following combination of features of the frontal: (1) osteoderms are apically flat, as Gaultia, not thick as in Placosaurus, and not inflated (or bulbous) as in Glyp- tosaurus, Eoglyptosaurus, Helodermoides, and Stenoplacosaurus; (2) generally rather fewer osteoderms contra numerous in Placo- saurus (especially Placosaurus estesi), Glyptosaurus, Eoglypto- saurus, and Helodermoides; (3) concave lateral margins unlike in the North American Helodermoides; (4) posterolateral process not distinctly laterally expanded and expansion includes only the posterior 1/3 of the bone, unlike in Placosaurus estesi and Stenoplacosaurus, in which the lateral expansion starts at the posterior 2/3 of the bone; and (5) frontals fused only in the late ontogeny (fusion is present only in the larger, robust speci- men). In Stenoplacosaurus, the frontals are unfused. |
Measurements
No measurements are available
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| Source: subf = subfamily, f = family, c = class, subp = subphylum | |||||
| References: Behler and King 1979, Hendy et al. 2009, Carroll 1988, Head 2005 | |||||
Collections
No collection or age range data are available