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Homoeospira fiscellostriata

Rhynchonellata - Athyridida - Rhynchospirinidae

Sister species lacking formal opinion data

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Synonymy list
YearName and author
1913Homoeospira fiscellostriata Savage p. 132 figs. pI. 6, figs. 23, 24.
1913Homoeospira subcircularis Savage p. 132 figs. pI. 6, figs. 26, 27.
1974Homoeospira fiscellostriata Amsden p. 78 figs. PI. 20, figs. 1a-ld

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phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderAthyrididaBoucot et al. 1964
suborderRetziidinaBoucot et al. 1964
superfamilyRhynchospirinoideaSchuchert 1929
familyRhynchospirinidaeSchuchet 1929
genusHomoeospiraHall and Clarke 1893

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.

T. E. Savage 1913Shell biconvex, subovate in outline, somewhat longer than wide. Ventral valve more convex than the dorsal, the greatest convexity in the umbonal region from which the surface slopes rather steeply to the cardinal and cardino-Iateral margins, and more gently to the' sides an,d front; the mesial portion of the valve somewhat elevated, with a prominent stria on each side of the median line; in the furrow between these striae is a rounded ridge which extends nearly three-fourths of the distance from the front to the beak. The beak is prominent and pointed, but not much incurved over the hinge line. Dorsal valve moderately convex, the greatest depth a little posterior to the middle, from which the surface slopes with a rather uniform curvature to the cardinal, lateral and anterior margins; the mesial portion of the valve bears a slight depression which is occupied by a low ridge extending nearly to the beak and is divided by a shallow furrow in the anterior half of its length, with a trace of an additional division near the front margin. The beak is small and closely in curved beneath that of the ventral valve. Surface of both valves marked by radiating striae of which about four on each side of the median line of the valves extend to the beaks; of these, the two adjacent to the median line on each valve usually divide twice, while some of the others divide once and others divide twice between the beak and the margin. No distinct concentric lines of growth are visible.