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Loch Fyne
M010013

Loch Fyne
M010015

Loch Fyne
M010016

Loch Fyne
M010017

Loch Fyne
M010018

Loch Fyne
M010019


M012647


M012648


M012649


M012650
Musculus discors (Linnaeus, 1767)
''
NMW Image No.

Musculus discors (Linnaeus, 1767)

Mytiloidea : Mytilidae
Tebble name: Musculus discors (Linnaeus)
Smith & Heppell name: Musculus discors (L., 1767)

To size: To 12mm. Shell Structure: Thin but not fragile. Equivalve: Equivalve. Equilateral: Strongly inequilateral beaks close to the anterior margin. Tumidity: Not inflated, umbos low. Outline: Modioliform; ligament margin long, not sloping steeply, angled to posterior dorsal margin; posterior rounded; ventral margin long, more or less straight but often depressed adjacent to non ribbed area; anterior narrow, rounded.

Sculpture: Radially ribbed except for smooth median area; 30-40 flat posterior ribs often faint, interspaces narrow; 9-12 prominent anterior ribs; Overall with comarginal lines and growth stops. Margin: Crenulate where radial ribs meet margin. Ligament: Deeply inset extending for most of the posterior dorsal margin. Hinge: Hinge plate narrow, few large dysodont teeth posterior of ligament distinct from marginal crenulations, otherwise smooth. Pallial Musculature: Mostly obscure. Periostracum: Green to greenish brown, thin, persistent. Colour: Grayish white, internally lustrous.



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Distribution & Ecology


Lower intertidal and shallow sublittoral attached to rocks and algae, occasionally forming dense rafts on stable gravel bottoms.

Depth Range
Intertidal
Continental Shelf (to 200m)


Juveniles & Similar Species

Juvenile Description

Key Features & Similar Species

Additional Comments

Mytiloidea : Mytilidae

References


Listed are literature citing Musculus discors (Linnaeus, 1767). Reference containing the species Type Description is highlighted.
Linnaeus C 1767. Systema Naturae. Editio duodecima. 1. Regnum Animale. 1&2 Homliae, Laurentii Salvii. 1-532: 533-1327.

Resources


Downloads

Weblinks

  • Conchological Society of Great Britain & Ireland
    Provides resources for understanding, identifying, recording, and conserving molluscs
  • CLEMAM
    Check List of European Marine Mollusca
  • MarLIN
    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.
  • BivAToL
  • MarBEF
  • Malacological Society
  • Unitas Malacologica
  • Census of Marine Life
  • MarBEF
    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.

Record last modified - 15/01/2014