Abra longicallus (Scacchi, 1834)Tellinoidea : Semelidae
Inequilateral, beaks to the posterior.
Ovate, posterior dorsal margin almost straight sloping to a narrowly rounded posterior margin, anterior dorsal margin almost straight sloping to a broadly rounded anterior margin.
Sculpture: Concentric lines and faint radial lines. Growth stages clear. Margin: Smooth. Ligament: External small brown, arched band, internal ligament in a small elongated, triangular chondrophore. Hinge: LV one small cardinal and single weak laterals; RV two cardinals and single laterals. Pallial Musculature: Deep pallial sinus, confluent with pallial line for two thirds of its length. Cruciform muscle scars visible in some specimens. Periostracum: Brown. Colour: Creamy white.
Distribution & Ecology
On the continental margin and upper slope from c.200-1000m. In oceanic muddy sand, low amounts of organic carbon.
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)
Juveniles & Similar Species
Key Features & Similar Species
Listed are literature citing Abra longicallus (Scacchi, 1834). Reference containing the species Type Description is highlighted.
Scacchi A 1835. Notizie intorno alle conchiglie ed a’zoofiti fossili che si trouvano nelle vicinanze Gravina in Puglia. Annali Civili del Regno delle Due Sicilie. 6: 75-84.
- Conchological Society
of Great Britain & Ireland
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- Malacological Society
- Unitas Malacologica
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