Irus irus (Linnaeus, 1758)
Veneroidea : Veneridae
Inequilateral. Beaks in front of midline.
Oblong, narrowed anteriorly. Lunule very small, indistinct in some specimens where the sculpture encroaches upon it. Escutcheon extensive, almost reaching posterior margin; prominent in LV as sunken area. In RV is encroached upon by sculpture.
Sculpture: Few, well-spaced concentric frill-like lamellae interspersed by radial grooves and concentric lines to give cancellate sculpture. The lamellae become more elongated toward the posterior margin where they become more flamboyant. Margin: Smooth, but the ventral part of last lamellae is wavy, giving the appearance of a crenulate margin in some. Ligament: Sunken into escutcheon, appears as a dark band that extends just over a third of the dorsal margin. Hinge: 3 cardinals in each valve in LV central and anterio bifid, in RV central and posterior bifid. No laterals. Pallial Musculature: Pallial sinus extends between a third and half length of shell and is rounded. Periostracum: Thin, matt. Colour: Cream/off-white shell with beige/orange colouration on anterior and posterior margins.
Distribution & Ecology
Continental Shelf (to 200m)
Additional Information & Related Species
Veneroidea : Veneridae
Listed are literature citing Irus irus (Linnaeus, 1758). Reference containing the species Type Description is highlighted.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.
- Conchological Society
of Great Britain & Ireland
Provides resources for understanding, identifying, recording, and conserving molluscs
Check List of European Marine Mollusca
The Marine Life Information Network for Britain and Ireland (MarLIN) provides information for marine environmental management, protection and education. It is a centre of excellence in spatially based and time-series marine biological information and supports good stewardship in the marine environment.
- NBN Gateway
National Biodiversity Network's Gateway. Use it to explore UK biodiversity data, as contributed by participating data providers.
- Malacological Society
- Unitas Malacologica
- Census of Marine Life
MarBEF, a network of excellence funded by the European Union and consisting of 94 European marine institutes, is a platform to integrate and disseminate knowledge and expertise on marine biodiversity, with links to researchers, industry, stakeholders and the general public.