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Shikamaia (Alatoconcha)
Taxonomy
Alatoconcha was named by Termier et al. (1973).
It was reranked as Shikamaia (Alatoconcha) by Yancey and Boyd (1983) and Chen et al. (2018).
It was assigned to Alatoconchidae by Termier et al. (1973) and Bouchet et al. (2010); and to Shikamaia by Yancey and Boyd (1983) and Chen et al. (2018).
It was reranked as Shikamaia (Alatoconcha) by Yancey and Boyd (1983) and Chen et al. (2018).
It was assigned to Alatoconchidae by Termier et al. (1973) and Bouchet et al. (2010); and to Shikamaia by Yancey and Boyd (1983) and Chen et al. (2018).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1973 | Alatoconcha Termier et al. p. 76 |
| 1983 | Shikamaia (Alatoconcha) Yancey and Boyd p. 510 |
| 2010 | Alatoconcha Bouchet et al. |
| 2018 | Shikamaia (Alatoconcha) Chen et al. p. 150 |
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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.
Subg. †Shikamaia (Alatoconcha) Termier et al. 1973
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†Shikamaia (Alatoconcha) vampyra Termier et al. 1973
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. Chen et al. 2018 | Alatoconcha is distinguished from Shikamaia (Shikamaia) by a larger dorsal niche and a subcircular rather than elongate shell outline. |