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Phragmactinidae
Taxonomy
Phragmactidae was named by Spencer (1951). It is not extant. Its type is Phragmactis.
It was corrected as Phragmactinidae by Spencer and Wright (1966), Blake (2014).
It was assigned to Eophiuricae by Spencer (1951), Owen (1965); to Proturina by Spencer and Wright (1966); and to Asterozoa by Blake (2014).
It was corrected as Phragmactinidae by Spencer and Wright (1966), Blake (2014).
It was assigned to Eophiuricae by Spencer (1951), Owen (1965); to Proturina by Spencer and Wright (1966); and to Asterozoa by Blake (2014).
Subtaxa
Phragmactis (type genus), Swataria
Synonymy list
| Year | Name and author |
|---|---|
| 1951 | Phragmactidae Spencer p. 111 |
| 1965 | Phragmactidae Owen p. 547 |
| 1966 | Phragmactinidae Spencer and Wright p. U81 |
| 2014 | Phragmactinidae Blake p. 1164 |
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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.
Fm. †Phragmactinidae Spencer 1951
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. K. Spencer 1951 | Outer lateralia narrow, spines in single row at right angles to arm axis |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Aberhan 1992, Bambach et al. 2007 | |||||