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Zygospira deflecta

Rhynchonellata - Atrypida - Anazygidae

Taxonomy
Atrypa deflecta was named by Hall (1847).

It was recombined as Zygospira deflecta by Schuchert (1897), Foerste (1920) and Liberty (1969).

Sister species lacking formal opinion data
Z. carinata, Z. cincinnatiensis, Z. circularis, Z. plinthii

Synonymy list
YearName and author
1847Atrypa deflecta Hall p. 140 figs. pl. 33, fig. 4
1897Zygospira deflecta Schuchert p. 463
1920Zygospira deflecta Foerste pp. 204 - 205
1969Zygospira deflecta Liberty

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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
orderAtrypidaRzhonsnitskaya 1960
suborderAnazygidinaCopper 1996
superfamilyAnazygoideaDavidson 1883
familyAnazygidaeDavidson 1883
subfamilyAnazyginaeDavidson 1883
genusZygospira
speciesdeflecta(Hall 1847)

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.

†Zygospira deflecta Hall 1847
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Diagnosis
ReferenceDiagnosis
A. F. Foerste 1920Shells small, scarcely exceeding 3 mm. in length, characterized by a broad and distinct median depression on the brachial valve, its entire width occupied by five radiating plications, the total number of plications on the valve usually equalling 17 to 21. The median part of the pedicel valve, for a width of 4 radiating plications, is distinctly elevated above the rest of the valve. Contrasted with the brachial valve, the pedicel valve is considerably more convex.