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
Depth Range
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Abyssal Plain (4000m +)
Additional Information & Related Species
References
Resources
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