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Parazyga hirsuta
Taxonomy
Atrypa hirsuta was named by Hall (1857). Its type specimen is I1714, a shell, and it is a 3D body fossil.
It was recombined as Trematospira hirsuta by Hall (1867); it was recombined as Parazyga hirsuta by Hall and Clarke (1893) and Alvarez and Brime (2000).
It was recombined as Trematospira hirsuta by Hall (1867); it was recombined as Parazyga hirsuta by Hall and Clarke (1893) and Alvarez and Brime (2000).
Synonymy list
| Year | Name and author |
|---|---|
| 1857 | Atrypa hirsuta Hall p. 168 |
| 1867 | Trematospira hirsuta Hall pp. 274-275 figs. fig. 7-10, pl. 45,16-32 |
| 1893 | Parazyga hirsuta Hall and Clarke figs. pl. 49,28-39 |
| 2000 | Parazyga hirsuta Alvarez and Brime pp. 12 - 13 figs. 4.1-4.6 |
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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.
†Parazyga hirsuta Hall 1857
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. Alvarez and C. Brime 2000 | Moderate sized, subequally biconvex, transversely oval, subcircular or elongate shells with sparse lamellose growth lines and numerous, long, hollow spines anteriorly or anterolaterally directed; dorsal fold and ventral sulcus commonly present; costae simple, numerous, fine, rounded, of the same width across shell; conjunct deltidial plates present or absent; foramen in permesothyridid position; dental plates stout, pedicle collar more or less complete; triangular outer hinge plates well developed, projecting posteriorly as thin, flat cardinal flanges; crural bases strongly divergent, inner hinge plates absent; dorsal myophragm present; jugum as in Trematospira but with lateral branches slightly inclined anteriorly. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Givetian or 387.70000 to 382.70000 Ma
Collections (23 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Devonian | USA (New York) | Parazyga hirsuta (91240 91277 91278) | |
| Middle Devonian | USA (Indiana) | Parazyga hirsuta (11101) | |
| Givetian | USA (New York) | Parazyga hirsuta (8978 8979 8983 8984 8987 8993 8994 8996 9003 9005 9006 9019 9028 10110 10119 89672 96209 206793) | |
| Givetian | USA (Indiana) | Trematospira hirsuta (170009) |