Margarella expansa (Sowerby 1838)
- Dataset
- Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Gastropoda
- order
- Vetigastropoda
- family
- Calliostomatidae
- genus
- Margarella
- species
- Margarella expansa
description
Description. Shell width to 8.5 mm (up to 14.1 mm according to Strebel 1905 a); 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.
description
Fig. 2 F
materials_examined
Examined material. 3 an. and 9 sh. (MACN-In 40666).
Name
- Homonyms
- Margarella expansa (Sowerby 1838)