Species Account

Halonympha depressa (Jeffreys 1882)

Verticordioidea : Cuspidariidae

Tebble name: n/a
Smith & Heppell name: n/a

To size: To 6mm. Shell Structure: Thin. Equivalve: Equivalve. Equilateral: Slightly inequilateral, beaks slightly behind midline. Tumidity: Compressed. Outline: Body of shell ovate; anterior a continuous broad curve; ventral curved. Rostrum short slightly shorter than length of body, broadly triangular, dorsal slope slightly concave, ventral margin scarcely concave, sulcus between body and rostrum very shallow.

Sculpture: Of fine concentric ridges, becoming a little irregular on rostrum. Margin: Inner margin smooth. Ligament: Internal, on a small, posteriorly projecting, chondrophore. Hinge: Cardinal teeth absent; each valve with a posterior clavicular rib resembling an oblique lateral tooth. Pallial Musculature: Indistinct. Periostracum: Persistent on rostrum, pale brown. Colour: Greyish-white.

Distribution & Ecology

Not recorded in our study area; known from off Portugal.

Depth Range
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Abyssal Plain (4000m +)

Additional Information & Related Species


Listed are literature citing Halonympha depressa (Jeffreys 1882). Reference containing the species Type Description is highlighted.

Jeffreys J.G. 1882. On the Mollusca procured during the ‘Lightning’ and ‘Porcupine’ Expeditions, 1868-70. (Part IV). Proceedings of the Zoological Society of London. 1881: 921-952.
Salas C. 1996. Marine Bivalves from off the Southern Iberian Peninsula collected by the Balgim and Fauna 1 expeditions. Haliotis. 25: 33-100.


  • Conchological Society of Great Britain & Ireland
    Provides resources for understanding, identifying, recording, and conserving molluscs
    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.

Image Gallery

Record last modified: 22/03/2016