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Asteronychinae (disused)
Taxonomy
Asteronychinae was named by Matsumoto (1915). It is extant. Its type is Asteronyx.
It was assigned to Trichasteridae by Matsumoto (1915).
It was assigned to Trichasteridae by Matsumoto (1915).
Synonymy list
| Year | Name and author |
|---|---|
| 1915 | Asteronychinae Matsumoto p. 52 |
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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.
Subfm. Asteronychinae Matsumoto 1915
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. Matsumoto 1915 | Disk very large, arms very slender and unbranched. A single madreporite is present. Perihaemal canal entirely closed. Peritoneal cavity divided into five compartments by the interradial attachments of the gastral pouches to body wall. Genital bursse separated from the perihsemal canal and the peritoneal cavity, but the pairs of the same radius communicating with each other, the communication passing above the outer end of the oral frames and the first vertebra, just outside the perihaemal canal. Lateral arm plates of opposite sides separated by the comparatively large ventral arm plates. Arm spines, 3-8. |