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“Margarella (Promargarita) achilles (Strebel)
Photinula achilles Strebel, 1908, p. 73, pl. 5, fig. 69a, b.
TYPE LOCALITY. South Georgia, 1-2 m.
St. 145. Stromness Harbour, South Georgia, between Grass I. and Tonsberg Point, 7 Jan. 1927, 26-35 m.
St. MS 6. East Cumberland Bay, ¼ mile south of Hope Point to 1¼ cables S × E of King Edward Point Lt., South Georgia, 12 Feb. 1925, 24-30 m.
St. WS 25. Undine Harbour (north), South Georgia, 17 Dec. 1926, 18-27 m.
This is a large, thin-shelled species, depressed-turbinate, with a relatively large ovate aperture. It is light reddish brown with a broad zone of white surrounding the umbilical area, occasionally a narrow white band just below the periphery and rarely a second narrow white band above the periphery. The body-whorl is weakly biangulate. Sculpture consisting of incised lines, clearly shown on the early whorls and around the umbilical area, but obsolete elsewhere. In the adult there are about eight lirations on the early whorls and six or seven around the umbilical area. The umbilicus is completely covered by a broad concave white columellar callus. Strebel compares this species with expansa, but the relationship is certainly with Promargarita tropidophoroides.
Major diameter 19.0 mm. minimum diameter 16.2 mm.; height 16.5 mm. (St. WS 25).
DENTITION. The radula is scarcely distinguishable from that of tropidophoroides.”
(Powell, 1951: 99)
Margarella achilles is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.[2][3]
The shell grows to a height of 19 mm.
This subantarctic marine species is found off South Georgia at depths between 0 m and 53 m.
Margarella achilles is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Margarella achilles is een slakkensoort uit de familie van de Calliostomatidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1908 door Strebel.
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