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Taxonomy

Species & Genus Richness by
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Species Richness & Endemism by
Geography

Data last updated
Mon 1 Dec 2025

Publication Alder (1831): summary

publication summary

Full Citation

Alder, J. 1831. A catalogue of the land and fresh-water testaceous Mollusca found in the vicinity of Newcastle upon Tyne, with remarks. Trans. Natur. Hist. Soc. Northumbld. Durham 1: 26-41. Available electronically.

Attributed Nominal Genera

Anadon Alder, 1831

Alder, 1831. Trans. Natur. Hist. Soc. Northumbld. Durham 1: 40.
(error for Anodon Oken, 1815)
Type species: Mytilus cygneus Linnaeus, 1758 = Anodonta cygnea

Pera Leach, 1852

Alder, 1831. Trans. Natur. Hist. Soc. Northumbld. Durham 1: 41 [not used as valid].
Leach, 1852. Syn. Moll. Gr. Brit.: 288, 291.
(intro'd as syn. of Cyclas Lamarck, 1799)

Attributed Nominal Species

Cyclas gibba Alder, 1831 = Euglesa obtusalis

Alder, 1831. Trans. Natur. Hist. Soc. Northumbld. Durham 1: 41.

Taxonomic Opinions

Anadon [sic] anatina Linn. = Anodonta anatina

Cyclas calyculata Drap. = Sphaerium lacustre
+ Tellina lacustris Müller, 1774

Cyclas cornea Linn. = Sphaerium corneum
+ Tellina rivalis Müller, 1774

Cyclas fontinalis Drap. = Euglesa casertana
+ Pera pulchella Leach, 1852
+ Tellina pusilla Gmelin, 1791

Cyclas fontinalis Drap. = Euglesa pulchella

Cyclas gibba = Euglesa obtusalis
+ Pisidium obtusale Brown, 1831

Cyclas lacustris Drap. = Sphaerium nucleus

Cyclas obliqua Lam. = Pisidium amnicum
+ Cyclas palustris Draparnaud, 1806
+ Tellina amnica Müller, 1774

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