Margarella expansa
Creators
Description
Margarella expansa (Sowerby, 1838)
Fig. 2F
Margarita expansa Sowerby, 1838a: 24; Sowerby, 1838b: pl. 134, figs. 16, 17
Photinula expansa — Melvill & Standen, 1907: 126; Melvill & Standen, 1912: 121
Margarella expansa — Zelaya, 2004: figs. 2, 4, 7, 16–18, 21, 22 (protoconch and radula)
Examined material. 3 an. and 9 sh. (MACN-In 40666).
Description. Shell width to 8.5 mm (up to 14.1 mm according to Strebel 1905a); trochiform, solid. Protoconch of about 1 convex whorl; transition to teleoconch poorly defined. Teleoconch of up to 4.5 whorls, slightly convex in outline; the latter widely laterally expanded, comprising about 85% of total shell height. Suture impressed. Surface white, shiny, iridescent green; only sculptured with faint growth lines. Aperture rounded, interior iridescent; columellar callus thick, expanded, forming a depression over the umbilical area. Operculum rounded, multispiral; pale brown, translucent.
Notes
Files
Files
(1.4 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:6e9a6bcff7d2037ecbb3f3c46b1c8a31
|
1.4 kB | Download |
System files
(10.4 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:a50e86183bc23bd07e1808dc8e889299
|
10.4 kB | Download |
Linked records
Additional details
Identifiers
Biodiversity
- Family
- Calliostomatidae
- Genus
- Margarella
- Kingdom
- Animalia
- Order
- Vetigastropoda
- Phylum
- Mollusca
- Scientific name authorship
- Sowerby
- Species
- expansa
- Taxon rank
- species
- Taxonomic concept label
- Margarella expansa (Sowerby, 1838) sec. Luca & Zelaya, 2019
References
- Sowerby, G. B. I. (1838 a) A descriptive catalogue of the species of Leach's genus Margarita. Malacological and Conchological Magazine, 1, 23 - 27.
- Sowerby, G. B. I. (1838 b) Margarita. Conchological Illustrations, 1, pls. 132 - 134.
- Melvill, J. C. & Standen, R. (1907) The marine Mollusca of the Scottish National Antarctic Expedition. Transactions of the Royal Society of Edinburgh, 46, 119 - 157, 1 pl.
- Melvill, J. C. & Standen, R. (1912) The marine Mollusca of the Scottish National Antarctic Expedition. Part 2. Transactions of the Royal Society of Edinburgh, 48, 105 - 140, 1 pl.
- Zelaya, D. G. (2004) The genus Margarella Thiele, 1893 (Gastropoda: Trochidae) in the southwestern Atlantic Ocean. The Nautilus, 118 (3), 112 - 120.
- Strebel, H. (1905 a) Beitrage zur Kenntnis der Molluskenfauna der Magalhaen-Provinz 2. Die Trochiden. Zoologische Jahrbucher, 8 (Supplement), 121 - 166, pl. 5.