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Fletcherithyris biundata

Rhynchonellata - Terebratulida - Dielasmatidae

Taxonomy
Atrypa biundata was named by M'Coy (1847). It is a 3D body fossil. Its type locality is Black Head, Gerringong (W.B. Clarke coll), which is in a Wordian marine sandstone in the Gerringong Formation of Australia.

It was synonymized subjectively with Terebratula amygdala by Campbell (1965); it was recombined as Fletcherithyris biundata by Waterhouse (1982), Waterhouse (1987) and Clarke (1987).

Synonyms
Synonymy list
YearName and author
1847Terebratula amygdala Dana p. 152
1847Atrypa biundata M'Coy p. 20 figs. Pl 13, figs 9-9a
1849Terebratula amygdala Dana p. 682 figs. Pl 1, figs 2a-d
1961Fletcherina amygdala Stehli p. 453 figs. Pl 61, figs 7,10,11,14,15,19-22
1965Fletcherithyris amygdala Campbell p. 26 figs. Pl 3, figs 1-6; pl 6, figs 11-34; text-figs 7-9
1982Fletcherithyris biundata Waterhouse p. 62 figs. Pl 15e,j,17a,c
1987Fletcherithyris biundata Clarke p. 284 figs. 19A-Z
1987Fletcherithyris biundata Waterhouse p. 46 figs. Pl 13, figs 12-16

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
RankNameAuthor
classRhynchonellataWilliams et al. 1996
orderTerebratulida
suborderTerebratulidina
superfamilyDielasmatoideaSchuchert 1913
familyDielasmatidaeSchuchert 1913
subfamilyDielasmatinaeSchuchert 1913
genusFletcherithyris
speciesbiundata()

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.

Diagnosis
ReferenceDiagnosis
J. B. Waterhouse 1987Medium-sized shells with broadly sinuate or sulciplicate anterior commissure, and low anterior ventral fold and dorsal sulcus in many specimens. Septalium high and only 0.18 to 0.22 of length of valve. Crural points very high.