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“Margarella expansa (Sowerby)
Margarita expansa Sowerby, 1838, p. 24.
Margarita expansa Sowerby, 1841, figs. 16, 17.
Photinula expansa H. & A. Adams, 1858, pp. 427-8.
Trochus (Photinula) expansus E. A. Smith, 1879, p. 167.
Photinula expansa Pilsbry, 1889, p. 279, pl. 39, figs. 51, 52.
Photinula expansa V. Ihering, 1902, p. 99.
Photinula expansa Smith, 1902, p. 207.
Photinula expansa Strebel, 1905, p. 152, pl. 5, figs. 9-11, 14, 15.
Photinula expansa Melvill & Standen, 1907, p. 98.
Photinula (Margarella) expansa Strebel, 1908, p. 72, pl. 5, fig. 68.
Margarella expansa Thiele, 1912, p. 234.
TYPE LOCALITY. Falkland Is.
St. 51. Off Eddystone Rock, East Falkland Is., 7 miles N 50° E to 7.6 miles N 63° E of Eddystone Rock, 4 May 1926, 105-115 M.
St. 55. Entrance to Port Stanley, East Falkland Is., 2 cables S 24° E of Navy Point, 16 May 1926, 10—16 m.
St. 56. Sparrow Cove, Port William, East Falkland Is., 16 May 1926, 10½-16 m.
St. 58. Port Stanley, East Falkland Is., 19 May 1926, 1-2 m.
St. WS 85. 8 miles S 66° E of Lively I., East Falkland Is., 25 Mar. 1927, 79 m.”
(Powell, 1951: 95-96)
Margarella expansa is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.[2][3][4]
The shell grows to a height of 14.1 mm. The thin, imperforate shell has a depressed-conoidal shape. It is shining, of a light olivaceous tint or somewhat tinged with pink. Its surface is smooth. The acute spire is conoidal. The sutures are slightly impressed. The shell contains about 42 rapidly widening whorls. The large body whorl is rounded at the periphery and a little impressed or margined below the suture. The large aperture is rounded and angular above, green and iridescent inside. The columellar margin is a little straightened. The umbilico-columellar tract is slightly excavated.[5]
This marine species occurs off the Falkland Islands and in the Straits of Magellan at depths between 0 m and 150 m.
Margarella expansa is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Margarella expansa is een slakkensoort uit de familie van de Calliostomatidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1838 door G.B. Sowerby I.
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