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Cryptacanthia compacta
Taxonomy
Waldheimia compacta was named by White and St John (1867) [Waldheimia? compacta]. It is the type species of Cryptacanthia.
It was recombined as Cryptacanthia compacta by Williams et al. (2007).
It was recombined as Cryptacanthia compacta by Williams et al. (2007).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1867 | Waldheimia compacta White and St John p. 119 |
| 2007 | Cryptacanthia compacta Williams et al. p. 2027 |
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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.
†Cryptacanthia compacta White and St John 1867
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams et al. 2007 | Small, biconvex to concavoconvex, unisulcate; median septum usually absent or present apically, hinge plate concave to nearly flat, perforate; loop with hoodlike ascending lamellae and transverse band, descending lamellae becoming independent very late, anterior extremities of loop spinose. |
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 5.00 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||