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Parazyga hirsuta

Rhynchonellata - Athyridida - Parazygidae

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).

Synonymy list
YearName and author
1857Atrypa hirsuta Hall p. 168
1867Trematospira hirsuta Hall pp. 274-275 figs. fig. 7-10, pl. 45,16-32
1893Parazyga hirsuta Hall and Clarke figs. pl. 49,28-39
2000Parazyga hirsuta Alvarez and Brime pp. 12 - 13 figs. 4.1-4.6

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderAthyrididaBoucot et al. 1964
suborderRetziidinaBoucot et al. 1964
superfamilyRhynchospirinoideaSchuchert 1929
familyParazygidae
genusParazyga
specieshirsuta(Hall 1857)

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
ReferenceDiagnosis
F. Alvarez and C. Brime 2000Moderate 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
Composition: low Mg calcitep
Environment: marineuc
Locomotion: stationarysubo
Attached: yessubo
Life habit: low-level epifaunalsubo
Diet: suspension feedersubo
Vision: blindc
Created: 2018-11-10 18:06:56
Modified: 2018-11-10 18:06:56
Source: subo = suborder, c = class, p = phylum, uc = unranked clade
References: Aberhan et al. 2004, Nesnidal et al. 2013

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 Devonian393.3 - 382.7USA (Indiana) Parazyga hirsuta (11101)
Middle Devonian393.3 - 382.7USA (New York) Parazyga hirsuta (91240 91277 91278)
Givetian387.7 - 382.7USA (Indiana) Trematospira hirsuta (170009)
Givetian387.7 - 382.7USA (New York) Parazyga hirsuta (8978 8979 8983 8984 8987 8993 8994 8996 9003 9005 9006 9019 9028 10110 10119 89672 96209 206793)