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Thu 3 September 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

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Publication Brown (1844): summary
     publication summary

Complete Citation

Brown, T. 1844. Illustrations of the Recent Conchology of Great Britain and Ireland, with the Description and Localities of All the Species, Marine, Land, and Fresh-Water (2nd edition, “greatly expanded”). 144 pp. Available electronically.

Attributed Nominal Genera

Alasmodon Thompson, 1820
Thompson, 1820. Ann. Phil. 16: 116.
‘Say’ Sowerby, 1824. Zool. Jour. 1: 54.
‘Say’ Sowerby, 1839. Conch. Man.: 2.
‘Say’ Swainson, 1840. Treat. Malacol.: 262, 264, 266, 269-274, 278-279, 290, 382.
De Kay, 1843. Zool. New York 5: 196.
‘Say’ Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 83.
‘Say’ Woodward, 1871. Man. Moll: 433.
(error for Alasmodonta Say, 1819; renamed Anelasmodon Agassiz, 1846)

Attributed Nominal Species

Alasmodon margaritiferus var. arcuata Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 84, pl. 30*, fig. 3.
Brown, 1845. Ill. Land & Fr. Water Conch. Gr. Brit. & Ireland: 115, pl. 23, fig. 3.
(intro'd as intra-sp. of Mya margaritifera Linnaeus, 1758; homonym of Alasmodonta arcuata Barnes, 1823)

Alasmodon margaritiferus var. olivacea Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 84, pl. 30*, fig. 1.
Brown, 1845. Ill. Land & Fr. Water Conch. Gr. Brit. & Ireland: 115, pl. 23, fig. 1.
(intro'd as intra-sp. of Mya margaritifera Linnaeus, 1758)

Anodon cygneus var. contorta Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 81, pl. 30, figs. 7-8.
Brown, 1845. Ill. Land & Fr. Water Conch. Gr. Brit. & Ireland: 106, pl. 18, figs. 1-2.
(intro'd as intra-sp. of Mytilus cygneus Linnaeus, 1758)

Anodon cygneus var. subrhombea Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 80, pl. 30, figs. 3-4.
(intro'd as intra-sp. of Mytilus cygneus Linnaeus, 1758)

Cyclas citrina Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 132, pl. 37, fig. 37.

Dreissena polymorpha Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 76, pl. 29, figs. 6, 9. [in part]
(reference to Mytulus polymorphus Pallas, 1771)

Dreissena polymorpha Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 76, pl. 29, figs. 4-5.
(reference to Mytulus polymorphus Pallas, 1771)

Mytilus maculatus Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 80.
Bourguignat, 1881. Mater. Moll. Acécphales Syst. Europ. 1: 285 [as ‘Anodonta maculata’].
(new name for Mytilus macula Sheppard, 1821)

Unio deshaysii Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 81, pl. 32, figs. 1-4.
Brown, 1845. Ill. Land & Fr. Water Conch. Gr. Brit. & Ireland: 108, pl. 20, 3-4.
(error for Unio deshayesii Michaud, 1831)

Unio pictorum Brown, 1844
Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 81, pl. 31, figs. 8-11.
(misidentified reference to Mya pictorum Linnaeus, 1758)

Taxonomic Opinions

Alasmodon margaritiferus = Margaritifera margaritifera
+ Unio margaritifera Draparnaud, 1801
+ Unio elongata Lamarck, 1819

Alasmodon margaritiferus = Pseudunio auricularius

Alasmodon margaritiferus var. arcuata = Margaritifera margaritifera

Alasmodon margaritiferus var. minor = Margaritifera margaritifera

Alasmodon margaritiferus var. olivacea = Margaritifera margaritifera

Alasmodon margaritiferus var. roissyi = Margaritifera margaritifera
+ Unio margaritifera Rossmässler, 1835

Anodon cygneus var. anatina Lamarck = Anodonta anatina

Anodon cygneus var. avonensis Montagu = Anodonta cygnea
+ Mytilus cygneus Maton & Rackett, 1807
+ Anodonta anatina Rossmässler, 1837

Anodon cygneus var. avonensis Montagu = Anodonta anatina

Anodon cygneus var. cellensis Pfeiffer = Anodonta cygnea
+ Anodonta cellensis Rossmässler, 1836
+ Anodonta cygnea Draparnaud, 1806
+ Anodon paludosus Turton, 1822
+ Anodonta sulcata Lamarck, 1819
+ Mytilus zellensis Gmelin, 1791

Anodon cygneus var. complanata Zielger = Pseudanodonta complanata
+ Anodonta compressa Menke, 1830
+ Anodonta complanata Rossmässler, 1836
+ Anodonta rhomboidea Schlüter, 1838

Anodon cygneus var. contorta = Anodonta cygnea

Anodon cygneus var. cygneus Pfeiffer = Anodonta cygnea
+ Anodonta cygnea Rossmässler, 1835
+ Musculus latus Fleming, 1828

Anodon cygneus var. intermedia Lamarck = Anodonta cygnea
+ Anodonta intermedia Pfeiffer, 1821

Anodon cygneus var. intermedia Lamarck = Anodonta anatina

Anodon cygneus var. piscinalis Nilsson = Anodonta cygnea
+ Anodonta ventricosa C. Pfeiffer, 1825
+ Mytilus macula Sheppard, 1821

Anodon cygneus var. piscinalis Nilsson = Anodonta anatina

Anodon cygneus var. ponderosa Pfeiffer = Anodonta anatina
+ Mytilus cygneus Maton & Rackett, 1807

Anodon cygneus var. rostrata Kokeil Museum = Anodonta anatina

Anodon cygneus var. stagnalis Sowerby = Anodonta cygnea

Anodon cygneus var. subrhombea Brown, MSS = Anodonta anatina
+ Anodonta piscinalis var. testa Rossmässler, 1837

Dreissena polymorpha Van Beneden
+ Tichogonia chemnitzii Rossmässler, 1835
+ Mytilus e fluvio wolga Chemnitz, 1795
+ Mytilus hagenii Baer, 1826
+ Mytilus volgensis Gray, 1825

Unio batava = Unio crassus
+ Unio batavus Nilsson, 1822
+ Unio pictorum Draparnaud, 1806

Unio deshaysii [sic] = Unio pictorum

Unio ovalis = Unio tumidus
+ Mya depressa Donovan, 1801
+ Mya ovata Donovan, 1802
+ Mysca solida Turton, 1822
+ Unio tumidus Rossmässler, 1836

Unio pictorum Lamarck
+ Mya pictorum Gmelin, 1791
+ Unio pictorum Draparnaud, 1806
+ Unio pictorum Pfeiffer, 1821
+ Unio pictorum Rossmässler, 1836
+ Unio rostrata Lamarck, 1819
+ Mya ovalis Montagu, 1803

Unio pictorum Lamarck = Unio mancus

Unio pictorum Lamarck = Unio tumidus

Unio pictorum Lamarck = Unio crassus

Unio rostrata Kokeil Museum = Unio pictorum
+ Unio elongatula C. Pfeiffer, 1825
+ Unio pictorum Rossmässler, 1837

Unio rostrata Kokeil Museum = Unio elongatulus

Unio tumidus Retzius
+ Unio tumidus Rossmässler, 1836
+ Mysca solida Turton, 1822

 
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