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Eleutherodontida
Taxonomy
Eleutherodontida was named by Kermack et al. (1998).
It was assigned to Allotheria by Kermack et al. (1998); to Haramiyida by Meng et al. (2017); and to Allotheria by Krause et al. (2020).
It was assigned to Allotheria by Kermack et al. (1998); to Haramiyida by Meng et al. (2017); and to Allotheria by Krause et al. (2020).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Eleutherodontida Kermack et al. p. 586 |
| 2017 | Eleutherodontida Meng et al. p. 291 |
| 2020 | Eleutherodontida Krause 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.
Subor. †Eleutherodontida Kermack et al. 1998
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Fm. †Hahnodontidae Sigogneau-Russell 1991
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. A. Kermack et al. 1998 | Allotheria with molar teeth having usually basined crowns, the basin being open at one end, and crossed by transverse flutings with sharp edges. Upper molars with three longitudinal rows of cusps, two of these being marginal; the row interpreted as buccal consists of a few or one cusp only. The third row is nearly central, dividing the basin into two unequal parts, deepest between the lingual and medial rows. One marginal cusp considerably larger than the others. Root either single showing incipient division, or fully divided into multiple components.
Differ from multituberculates in having cusps of different height with the distal cusp the largest, and an oval outline (rather than being roughly rectangular); differ from Jurassic and Early Cretaceous multituberculates in having three rows of cusps and the lingual row curyed. Differ from haramiyid upper molars (except Haramiyavia) by having three rows of cusps instead of two, the latter being more numerous on the marginal rows (up to ten in the buccal row' up to |2 in thę lingual row); differ from multituberculates and haramiyids by having very accentuated transverse fluting. Lower molars with a single marginal row of cusps, continuous around the tooth except for the anterior opening into the basin. Differ from multituberculate and haramyid lower molars where the two rows of cusps are parallel and no fluting occurs. |