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Acanthotheca junior
Taxonomy
Ribeiria junior was named by Runnegar (1996). It is a 3D body fossil. It is the type species of Acanthotheca.
It was recombined as Acanthotheca junior by Vendrasco et al. (2011).
It was recombined as Acanthotheca junior by Vendrasco et al. (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Ribeiria junior Runnegar p. 85 fig. 6.2K |
| 2010 | Ribeiria junior Vendrasco et al. pp. 106 - 108; 130 figs. txt. f. 3C; pl. 3 |
| 2011 | Acanthotheca junior Vendrasco et al. pp. 11A:25-26 fig. 16 |
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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.
†Acanthotheca junior Runnegar 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. J. Vendrasco et al. 2010 | Shell small (c. 1 mm long), subconical, slightly laterally compressed; aperture margin curved; indentation on sub-apical side, just above the aperture margin, likely the imprint of a pegma, variously developed in different specimens; inner shell layer nacreous, best preserved below inferred pegma, but also seen in other places along surface of internal moulds. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| Reference: Hendy et al. 2009 | |||||