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Image of Typhlodaphne strebeli Powell 1951
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Typhlodaphne strebeli Powell 1951

Description

provided by NMNH Antarctic Invertebrates

Typhlodaphne strebeli n.sp., Pl. IX, fig. 53

This species differs from the glossy, milk-white purissima in being uniformly warm-buff, more slender, with a smaller protoconch and with flexuous, subobsolete axials over all post-nuclear whorls. Shell elongate ovate-fusiform, with a tall spire, slightly less than height of aperture plus canal. Whorls 6½, including a small, smooth, papillate protoconch of 1½ whorls. Post-nuclear sculpture of narrow, flexuous, protractive, closely spaced axials, commencing just below the slightly concave shoulder, but becoming subobsolete towards the lower suture and on the base of the body-whorl. The axials number from eighteen to twenty-four on the spire-whorls. Sinus subsutural, occupying the shoulder, steeply descending at first and then produced forwards in the arcuate sweep of the outer lip. Aperture narrowly ovate with a rounded, broadly channelled anterior end not constricted and scarcely differentiated. Surface with numerous microscopic spiral lirations, not distinct enough to be counted.

Height 20.0 mm.; diameter 7.25 mm. (holotype).

Height 24.5 mm.; diameter 10.0 mm. (St. 160= topotype of purissima).

TYPE LOCALITY. St. 388. Between Cape Horn and Staten I., 56° 19½’S, 67° 09¾ W, 16 Apr. 1930, 121 m.”

(Powell, 1951: 174-175)