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Cristadinium
Taxonomy
Cristadinium was named by Head et al. (1989). It was considered monophyletic by Head et al. (1989).
It was assigned to Protoperidiniaceae by Head et al. (1989).
It was assigned to Protoperidiniaceae by Head et al. (1989).
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Cristadinium Head et al. p. 456 |
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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. †Cristadinium Head et al. 1989
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. J. Head et al. 1989 | Cysts autophragmal or possibly with closely appressed wall layers, dorso-ventrally compressed, brown, Peridinioid outline and having an apical and two antapical horns. Paracingulum planar to weakly helicoidal with margins bearing relatively continuous crests. Relatively continuous parasutural crests are present on the epicyst where they may incompletely reflect paratabulation. No other ornament occurs on the epicyst. The hypocyst may be without ornament or may bear crests and/or scattered projections. Wall surface smooth to finely granulate. Archeopyle presumably hexa-intercalary involving paraplate 2a. Paratabulation probably Peridinioid. |