Glossus humanus (Linnaeus, 1758)
Glossoidea : Glossidae
To size: To 102mm. Shell Structure: Thin, solid. Equivalve: Equivalve. Equilateral: Inequilateral, beaks to the anterior. Tumidity: Tumid. Outline: Subcircular, beaks curve markedly forwards. From the anterior view, the valves together form the outline of the human heart. Dorsal margin comprised mostly of inflated beak, curving to the anterior margin. Anterior margin narrowly curved to the anterior-ventral margin, curving broadly into the ventral margin. ventral part of posterior margin straight, to a very broadly curved posterior margin which continues to the dorsal margin and the beaks.
Sculpture: Concentric ridges and lines. Parts of shells show fine radial lines which are very close together. Margin: Smooth. Ligament: External, mid brown, running a third the way to posterior margin. Hinge: Three cardinals in each valve; in LV 2 lower cardinals lie next to each, slightly overlapping each other, with the third above, posterior and parallel to the others. In RV top 2 are next to and overlapping slightly and posterior to the smaller anterior cardinal below these. One posterior lateral in each valve. Pallial Musculature: No pallial sinus. Periostracum: Olive green, brown, reddish in some. Colour: Creamy white.
Distribution & Ecology
Continental Shelf (to 200m)
Additional Information & Related Species
Glossoidea : Glossidae
Listed are literature citing Glossus humanus (Linnaeus, 1758). Reference containing the species Type Description is highlighted.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.
Owen G 1953. On the biology of Glossus humanus (L,) (Isocardia cor Lam). Journal of the Marine Biological Association of the United Kingdom. 32: 85-106.
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