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Taxonomy
Chisternon was named by Leidy (1872). It is not extant. Its type is Baena undata.
It was synonymized subjectively with Baena by Hay (1902).
It was assigned to Chelonia by Leidy (1873); to Baeninae by Gaffney (1972); to Paracryptodira by Anquetin et al. (2009); to Baenodda by Lyson and Joyce (2010); to Baenidae by Hay (1908), Hay (1930), Carroll (1988), Hutchison (1992), Holroyd et al. (2001), Joyce (2007), Lyson and Joyce (2011) and Anquetin (2012); to Testudinata by Perea et al. (2014); to Eubaeninae by Joyce and Lyson (2015); and to Eubaeninae by Lyson et al. (2016).
It was synonymized subjectively with Baena by Hay (1902).
It was assigned to Chelonia by Leidy (1873); to Baeninae by Gaffney (1972); to Paracryptodira by Anquetin et al. (2009); to Baenodda by Lyson and Joyce (2010); to Baenidae by Hay (1908), Hay (1930), Carroll (1988), Hutchison (1992), Holroyd et al. (2001), Joyce (2007), Lyson and Joyce (2011) and Anquetin (2012); to Testudinata by Perea et al. (2014); to Eubaeninae by Joyce and Lyson (2015); and to Eubaeninae by Lyson et al. (2016).
Synonymy list
| Year | Name and author |
|---|---|
| 1872 | Chisternon Leidy |
| 1873 | Chisternon Leidy p. 341 |
| 1908 | Chisternon Hay p. 84 |
| 1930 | Chisternon Hay p. 72 |
| 1972 | Chisternon Gaffney pp. 248, 286 |
| 1988 | Chisternon Carroll |
| 1992 | Chisternon Hutchison |
| 2001 | Chisternon Holroyd et al. |
| 2007 | Chisternon Joyce |
| 2009 | Chisternon Anquetin et al. |
| 2010 | Chisternon Lyson and Joyce |
| 2011 | Chisternon Lyson and Joyce p. 792 |
| 2012 | Chisternon Anquetin p. 28 |
| 2014 | Chisternon Perea et al. |
| 2015 | Chisternon Joyce and Lyson |
| 2016 | Chisternon Lyson 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. †Chisternon Leidy 1872
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†Chisternon undatum Leidy 1871
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Invalid names: Baena gigantea Gilmore 1915 [synonym], Baena hebraica Cope 1872 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. P. Hay 1908 | Related closely to Baena, but having 2 bones, an anterior and a posterior, occupying the region of the nuchal of Baena. Normally 2 scutes occupying the area corresponding to the first vertebral oi Baena. No supramarginals. Maxilla with a nearly plane triturating surface. | |
| E. S. Gaffney 1972 | Baenines with temporal emargination greater than in Baena but less than in Eubaena; diameter oforbit and FORAMEN MAGNUM large relative to Baena; lateral maxillary constriction absent; nasal separate from frontals, lacking concavity and tapering in thickness anteriorly; posterior margin of skull roof with transverse ridge; basisphenoid large relative to that in Baena; preneural present; first vertebral forms posterior half of hourglass-shaped sulcus pattern occupying nuchal area, supracostal scutes present laterally in "waist" of hourglass. |