The genus name comes from the
Ancient Greek word glykymaris (perhaps from Glykys (sweet) and Meris (part)), a word which is only recorded once in Greek literature.
Fossil records
These clams are very common as fossils, from the
Cretaceous period in the
Valanginian age (between 140.2 ± 3.0 mya and 136.4 ± 2.0 mya). Fossil shells of these molluscs can be found all over the world. Genus Glycymeris includes about 100 extinct species.[2][3]
Fossil valve of Glycymeris inflata from the
Pliocene of Italy
Description
The shells are generally biconvex, with equal valves round in outline, and slightly longer than wide. Their size varies from medium to large. The external ligament lacks transverse
striations. These clams are a facultatively mobile infaunal suspension feeders.
Habitat
They are widespread on shallow seabeds that consist of heterogeneous-grained sediments.
Glycymeris chambersi P. Marshall & Browne, 1909 †: synonym of Tucetona chambersi (P. Marshall & Browne, 1909) †
Glycymeris chemnitzii Dall, 1909: synonym of Tucetona chemnitzii (Dall, 1909)
Glycymeris coalingensis Arnold, 1910: synonym of Glycymeris septentrionalis (Middendorff, 1849)
Glycymeris colorata Eichwald, 1829: synonym of Monodacna colorata (Eichwald, 1829)
Glycymeris concava P. Marshall, 1917 †: synonym of Glycymerita concava (P. Marshall, 1917) †
Glycymeris conradi Dall, 1909: synonym of Glycymeris septentrionalis (Middendorff, 1849) (invalid: junior secondary homonym of Glycymeris conradi (Whitfield, 1885); G. larvata is a replacement name)
Glycymeris corteziana Dall, 1916: synonym of Glycymeris septentrionalis (Middendorff, 1849)
Glycymeris dautzenbergi Prashad, 1932: synonym of Tucetona prashadi (Nicol, 1951)
Glycymeris diaphorus Dall, 1916: synonym of Glycymeris longior (G. B. Sowerby I, 1833) (junior synonym)
The genus name comes from the
Ancient Greek word glykymaris (perhaps from Glykys (sweet) and Meris (part)), a word which is only recorded once in Greek literature.
Fossil records
These clams are very common as fossils, from the
Cretaceous period in the
Valanginian age (between 140.2 ± 3.0 mya and 136.4 ± 2.0 mya). Fossil shells of these molluscs can be found all over the world. Genus Glycymeris includes about 100 extinct species.[2][3]
Fossil valve of Glycymeris inflata from the
Pliocene of Italy
Description
The shells are generally biconvex, with equal valves round in outline, and slightly longer than wide. Their size varies from medium to large. The external ligament lacks transverse
striations. These clams are a facultatively mobile infaunal suspension feeders.
Habitat
They are widespread on shallow seabeds that consist of heterogeneous-grained sediments.
Glycymeris chambersi P. Marshall & Browne, 1909 †: synonym of Tucetona chambersi (P. Marshall & Browne, 1909) †
Glycymeris chemnitzii Dall, 1909: synonym of Tucetona chemnitzii (Dall, 1909)
Glycymeris coalingensis Arnold, 1910: synonym of Glycymeris septentrionalis (Middendorff, 1849)
Glycymeris colorata Eichwald, 1829: synonym of Monodacna colorata (Eichwald, 1829)
Glycymeris concava P. Marshall, 1917 †: synonym of Glycymerita concava (P. Marshall, 1917) †
Glycymeris conradi Dall, 1909: synonym of Glycymeris septentrionalis (Middendorff, 1849) (invalid: junior secondary homonym of Glycymeris conradi (Whitfield, 1885); G. larvata is a replacement name)
Glycymeris corteziana Dall, 1916: synonym of Glycymeris septentrionalis (Middendorff, 1849)
Glycymeris dautzenbergi Prashad, 1932: synonym of Tucetona prashadi (Nicol, 1951)
Glycymeris diaphorus Dall, 1916: synonym of Glycymeris longior (G. B. Sowerby I, 1833) (junior synonym)