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Asgardaspira measuresae
Taxonomy
Barnesella measuresae was named by Rohr (1994). Its type specimen is USNM 473946, a shell, and it is a 3D body fossil.
It was recombined as Asgardaspira measuresae by Wagner (1999) and Wagner (2023).
It was recombined as Asgardaspira measuresae by Wagner (1999) and Wagner (2023).
Synonymy list
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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.
†Asgardaspira measuresae Rohr 1994
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. M. Rohr 1994 | Loosely coiled, discoidal shell with flat base, triangular whorl profile; apertural notch at sharp crest; width of whorl doubles per volution; lower-outer edge low on whorl, but above base.
Loosely coiled, discoidalw ith flatb ase and concave top, largest specimens 4 cm in diameter, whorls triangular in cross section, slightly higher than wide, with acutely angular crest; whorl height and width about double each volution; outer whorl surface nearly planar and sloping downward at about 55? and turning abruptly inward near base at about 45?; inner whorl surface sigmoid, curving downward first with slight concavity and then slight convexity at about 70?; whorls in contact but exposing most of previous whorls; final portion of whorl on some mature specimens starting to uncoil; upper sutures deep; basal sutures shallowly incised. |