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Species / Tundora

Tundora

Stromboidea


Type species: by original designation, Tundora tuberculata Stephenson, 1941:313

Original Diagnosis of Tundora by Stephenson, 1941, p. 313:

  • "This new genus is a small, rotund shell with a low spire, a small, low protoconch, and a rapidly expanding conch. The ornamentation on the uncallused shell consists of narrow to sharp spirals separated by proportionally wide flat.bottomed interspaces in which the incrementals appear as sharp, closely spaced lines. Axials are wanting. In the adult the entire shell is covered with a proportionally thick coating of callus consisting of 2 or more layers. A remarkable peculiarity of this coating is the development over much of its surface of low, round-topped tubercles, most of which are aligned in rows surmounting the concealed spirals; however, scattered nodes are present in the interspaces and nodes are absent on the parietal wall in the vicinity of the aperture, and also on the higher parts of the spire. In one meridian of the spire the callus is folded up to form a narrow, prominent axial ridge which extends up to and over the apex, somewhat as in Calyptraphorus. The four available shells of Tundora tuberculata are all incomplete but the holotype reveals the beginning of an expanded outer lip of undetermined extent. The columella is smooth and the aperture is elongated and terminates acutely at the rear; one of the paratypes shows a narrow anal canal impressed in the callus and extending well up on the side of the penultimate whorl. The anterior canal is narrow, recurved and is probably short. The family relationship of this species is not certainly known, but it appears to be a member of the Strombidae."

Tundora species are

Etymology: by anagram from rotunda.

Gender: feminine


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