Myonera demistriata Allen & Morgan, 1981
Verticordioidea : Cuspidariidae |
| Tebble name: | n/a |
| Smith & Heppell name: | n/a |
Notes on Nomenclature
In WoRMS as Bathyneara hadalis (Knudsen, 1970), however, Knudsen describes hadalis as compressed and without a sharply demarcated posterior projection and the line drawing shows a short, slightly convex anterior dorsal margin. Our specimen is moderately tumid with an elongate rostrum and a long anterior dorsal margin, matching Allen & Morgan’s image.
To size:
To 10mm.
Shell Structure:
Thin, fragile, hyaline.
Equivalve:
Equivalve.
Equilateral:
Equilateral, beaks close to midline.
Tumidity:
Moderate.
Outline:
Body of shell narrowly subovate, umbos projecting but not inflated; anterior dorsal slope long, irregularly straight and forming a narrow curve with anterior ventral margin which curves evenly with broadly curving ventral margin. Rostrum a little shorter than body length, dorsal margin straight sloping gently, ventral margin weakly concave, posterior sulcus weak.
Sculpture:
Rostrum set off by a prominet radial carinate rib, 6-7 radial ribs decreasing in prominence anteriorly over median area, anterior area with 9-11 concentric ridges. Rostrum with 5-7 radial riblets. Fine concentric striations overall but most prominent on rostrum.
Margin:
Margin dentate where largest ribs intersect edges.
Ligament:
Internal, on a small chondrophore lying beneath the beaks.
Hinge:
Teeth absent.
Pallial Musculature:
Indistinct.
Periostracum:
Obscure.
Colour:
White, semitransparent.
Distribution & Ecology
Carnivorous.
Depth Range
Abyssal Rise (2000 - 4000m)
Abyssal Plain (4000m +)
Additional Information & Related Species
Related Species
Verticordioidea : Cuspidariidae
References
Listed are literature citing Myonera demistriata Allen & Morgan, 1981. Reference containing the species Type Description is highlighted.
|
Allen J A & Morgan R E 1981. The functional morphology of Atlantic deep water species of the families Cuspidariidae and Poromyidae (Bivalvia): an analysis of the evolution of the septibranch condition. Philosophical Transactions of the Royal Society of London Series B. 294: 413-546. |
Resources
- 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
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