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Orbiramus
Taxonomy
Orbiramus was named by Xia et al. (2007). It is not extant. Its type is Orbiramus normalis.
It was assigned to Aisenvergiinae by Xia et al. (2007).
It was assigned to Aisenvergiinae by Xia et al. (2007).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2007 | Orbiramus Xia 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. †Orbiramus Xia et al. 2007
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†Orbiramus minus Xia et al. 2007
†Orbiramus normalis Xia et al. 2007
†Orbiramus ovalis Xia et al. 2007
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. S. Xia et al. 2007 | Zoaria ramose, often branching dichotomously. Autozooecial apertures subcircular, oval, often petaloid due to in- dent by larger styles, and exilazooecia rare or wanting. Zooecial walls thickened only in marginal region of zoarium, forming ex- ozone distinct from endozone. Zooecial wall granular in endo- zone, and distinctly inclined fibrous or lamellate in exozone. Styles developed, situated within walls, often indenting apertures giving petaloid appearance. Diaphragms occur only at endozone/ exozone boundary and in exozone. |
Measurements
No measurements are available
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| Source: c = class, p = phylum, uc = unranked clade | |||||
| References: Smith et al. 2006, Nesnidal et al. 2013, Kiessling 2004 | |||||