Species Account

Yoldiella solidula Warén, 1989

Nuculanoidea : Nuculanidae

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

Notes on Nomenclature

Nuculanidae in place of Yoldiidae
Killeen & Turner (2009) use Nuculanidae instead of Yoldiidae in agreement with Ockelmann & Warén (1998) who explan that the distinguishing characters between these two families has never been well documented. Until the Yoldiidae can be clearly distinguished from the Nuculanidae we shall treat them under the single family Nuculanidae.

To size: To 3.6mm. Shell Structure: Very solid. Equivalve: Equivalve. Equilateral: Equilateral, beaks located at midline. Tumidity: Tumid. Outline: Oval: antero-dorsal and postero-dorsal margins short, almost horizontal; dorsal margin - posterior margin and dorsal margin - anterior margin junctions visible; anterior margin narrowly rounded or slightly pointed at the horizontal midline; posterior margin pointed above the horizontal midline, lower posterior margin obliquely truncated forming a weakly rostrate posterior margin in larger specimens; ventral margin deeply curved. Umbo broad, prominent above the dorsal margin, situated at the midline.

Sculpture: Virtually smooth, with only faint concentric lines and growth stops. Margin: Smooth. Ligament: Amphidetic, attached internally to the underside of the beak without a projecting chondrophore or resilifer. Hinge: Hinge very solid, broad, v-shaped with 6-8 robust chevron-shaped teeth on either side of the ligament. Periostracum: Glossy, dark straw-coloured, with darker coloured bands in older individuals. Additional Characters: The hind-gut forms a simple, rounded loop on the right side of the body.

Distribution & Ecology

Yoldiella solidula has a wide distribution in the north Atlantic and Arctic from New England and west Greenland, east to the Kara Sea, south to Finmark, northern Iceland and the Faroes.

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

Additional Information & Related Species


Listed are literature citing Yoldiella solidula Warén, 1989. Reference containing the species Type Description is highlighted.

Killeen I.J. & Turner J. 2009. Yoldiella and Portlandia (Bivalvia) from the Faroe-Shetland Channel and Rockall Trough, Northeast Atlantic. Journal of Conchology. 39 (6): 733-778.
Warén A 1989. Taxonomic comments on some protobranch bivalves from the northeastern Atlantic. Sarsia. 74: 223-259.


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Record last modified: 22/03/2016