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Biangularia frechi

Gastropoda - Murchisoniina - Murchisoniidae

Taxonomy
Pleurotomaria (Biangularia) frechi was named by Spitz (1907) [Pleurotomaria (Biangularia) Frechi]. It is a 3D body fossil. Its type locality is Light Gray Riffskalk, Judenköpf, im Westen des Coglians, Carnic Alps, which is in a Pragian carbonate limestone in the Grau Riffkalk Formation of Austria. It is the type species of Pleurotomaria (Biangularia).

It was recombined as Biangularia frechi by Knight (1941) and Wagner (2023).

Synonymy list
YearName and author
1907Pleurotomaria (Biangularia) frechi Spitz p. 134 figs. pl. 12 f. 1a-c, 2-3
1941Biangularia frechi Knight p. 57 figs. Plate 46, figures 4a-c
2023Biangularia frechi Wagner p. 4897

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassOrthogastropoda
orderMurchisoniina
superfamilyMurchisonioidea()
familyMurchisoniidae
genusBiangularia()
speciesfrechi()

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.

Biangularia frechi Spitz 1907
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Diagnosis
ReferenceDiagnosis
J. B. Knight 1941High-spired, many-whorled, curiously compressed gastropods of moderate size with a selenizone; the spire laterally compressed and the whole twisted in a clockwise direction; whorl profile gently arched between sutures; sutures shallow; nucleus unknown; outer lip seemingly with a broad, shallow sinus that culminates a little below mid-whorl in what is probably but not certainly a short slit giving rise to a selenizone, the margin o f the lip gently oblique backwards from the upper suture to the selenizone with gentle forward convexity, below the selenizone gently oblique forward; selenizone moderately broad, gently convex, and bordered by revolving striae; ornamentation other than lines of growth lacking; shell of moderate thickness, its structure unknown.