Page last updated
Thu 3 September 2025

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

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

Publication Ortmann (1921): taxonomic opinions
     publication summary

Complete Citation

Ortmann, A.E. 1921. South American Naiades; a contribution to the knowledge of the freshwater mussels of South America. Memoirs of the Carnegie Museum 8: 451-670, pls. 34-48. Available electronically.

Taxonomic Opinions

Anodontites (Lamproscapha) ensiformis (Spix, 1827) = Lamproscapha ensiformis

Anodontites (s.s.) clessini (Fischer, 1890) = Anodontites tenebricosa
+ Mycetopus plicatus Clessin, 1882
+ Glabaris nehringi Ihering, 1893

Anodontites (s.s.) crispata Bruguiere, 1972 = Anodontites crispata
+ Anodon reticulatus Sowerby, 1867

Anodontites (s.s.) forbesiana (Lea, 1860) = Anodontites trapesialis

Anodontites (s.s.) hasemani Ortmann, 1921 = Anodontites trigona

Anodontites (s.s.) hyrioides Ortmann, 1921 = Anodontites trigona

Anodontites (s.s.) iheringi (Clessin, 1882) = Anodontites iheringi

Anodontites (s.s.) moricandii (Lea, 1860) = Anodontites moricandii
+ Anodonta hertwigii Ihering, 1890

Anodontites (s.s.) mortoniana (Lea, 1834) = Anodontites trigona
+ Anodonta weddellii Hupé, 1857
+ Anodonta lingulata Hupé, 1857

Anodontites (s.s.) mortoniana (Lea, 1834) = Anodontites patagonica

Anodontites (s.s.) obtusa (Spix, 1827) = Anodontites obtusa
+ Anodon obtusus var. lituratum Wagner, 1827
+ Anodonta obtusa var. hohenackeri Ihering, 1890

Anodontites (s.s.) patagonica (Lamarck, 1819) = Anodontites patagonica
+ Anodonta latomarginata Lea, 1834
+ Anodonta membranacea d’Orbigny, 1846
+ Anodonta solida Küster, 1853
+ Anodonta uruguayensis Lea, 1860
+ Glabaris bergi Ihering, 1893
+ Anodonta sinuosa Clessin, 1873
+ Anodonta serpentina Clessin, 1876
+ Anodon crassus Swainson, 1823
+ Anodonta wymanii Lea, 1860

Anodontites (s.s.) patagonica rubicunda (Lea, 1860) = Anodontites ferrarisii
+ Anodonta pazii Lea, 1866
+ Glabaris latomarginatus var. felix Pilsbry, 1896

Anodontites (s.s.) patagonica rubicunda (Lea, 1860) = Anodontites trapezea

Anodontites (s.s.) puelchana (d’Orbigny, 1835) = Anodontites trigona

Anodontites (s.s.) riograndensis (von Ihering, 1890) = Anodontites trapesialis
+ Anodonta troperziali, var. exotica Corsi, 1900

Anodontites (s.s.) rioplatensis (Sowerby, 1870) = Anodontites trapesialis

Anodontites (s.s.) tenebricosa (Lea, 1834) = Anodontites tenebricosa
+ Anodon tenebrosa Sowerby, 1867
+ Anodonta tenebricosta Corsi, 1900

Anodontites (s.s.) trapesialis anserina (Spix, 1827) = Anodontites trapesialis

Anodontites (s.s.) trapesialis scripta (Sowerby, 1867) = Anodontites trapesialis
+ Anodonta bahiensis Clessin, 1873

Anodontites (s.s.) trapezea (Spix, 1827) = Anodontites trapezea
+ Anodon rotundus Wagner, 1827

Anodontites (s.s.) trigona (Spix, 1827) = Anodontites trigona
+ Anodon moretonianus Sowerby, 1867
+ Anodon georginae Griffith & Pidgeon, 1833

Anodontites (s.s.) trigona (Spix, 1827) = Anodontites trapesialis

Castalia acuticosta Húpe, 1857 = Castalia ambigua

Castalia baro (von Ihering, 1910) = Castalia ambigua
+ Castalia ambigua Sowerby, 1869

Castalia hanleyana Sowerby, 1867 = Castalia ambigua

Castalia inflata d’Orbigny, 1835
+ Castalia quadrilatera Ihering, 1893

Castalia pectinata (Spix, 1827) = Castalia ambigua
+ Castalia ambigua Ihering, 1890

Castalia undosa von Martens, 1885

Castalina martensi von Ihering, 1891 = Castalia martensi

Castalina nehringi von Ihering, 1891 = Castalia nehringi

Castalina psammoica (d’Orbigny, 1835) = Castalia psammoica

Diplodon (Cyclomya) paranensis (Lea, 1834) = Diplodon paranensis
+ Unio nocturnus Lea, 1860
+ Unio paraguayanus Martens, 1895

Diplodon (Cyclomya) paranensis (Lea, 1834) = Diplodon funebralis

Diplodon (s.s.) berthae Ortmann, 1921 = Diplodon berthae

Diplodon (s.s.) burroughianus (Lea, 1834) = Diplodon burroughianus

Diplodon (s.s.) charruanus (d’Orbigny, 1835) = Diplodon rhuacoicus
+ Unio faba d’Orbigny, 1835
+ Unio rhuacoica d’Orbigny, 1835
+ Unio aethiops Lea, 1860
+ Unio parcus Lea, 1866
+ Diplodon hidalgoi Haas, 1916
+ Diplodon fortis Marshall, 1917

Diplodon (s.s.) charruanus (d’Orbigny, 1835) = Diplodon charruanus

Diplodon (s.s.) charruanus (d’Orbigny, 1835) = Diplodon aethiops

Diplodon (s.s.) deceptus Simpson, 1914 = Diplodon gratus
+ Unio gratus Ihering, 1893

Diplodon (s.s.) decipiens Ortmann, 1921 = Diplodon martensi

Diplodon (s.s.) ellipticus (Spix, 1827) = Diplodon ellipticus
+ Diplodon ellipticum Wagner, 1827
+ Diplodon (s.s.) wagnerianum Simpson, 1900
+ Diplodon ellipticus santanus Ihering, 1910

Diplodon (s.s.) enno Ortmann, 1921 = Diplodon rhombeus

Diplodon (s.s.) frenzelii (von Ihering, 1893) = Diplodon chilensis
+ Diplodon huapensis Bartsch, 1906

Diplodon (s.s.) granosus (Bruguiere, 1972) = Diplodon multistriatus
+ Unio psammactinus Philippi, 1848
+ Unio multistriatus Lea, 1831
+ Diplodon expansus Ihering, 1910

Diplodon (s.s.) granosus (Bruguiere, 1972) = Diplodon granosus

Diplodon (s.s.) gratus (Lea, 1860) = Diplodon gratus

Diplodon (s.s.) guaranianus (d’Orbigny, 1835) = Diplodon guaranianus

Diplodon (s.s.) hasemani Ortmann, 1921 = Diplodon guaranianus

Diplodon (s.s.) hildae Ortmann, 1921 = Diplodon hildae

Diplodon (s.s.) hylaeus (d’Orbigny, 1835) = Diplodon hylaeus

Diplodon (s.s.) imitator Ortmann, 1921 = Diplodon imitator

Diplodon (s.s.) lacteolus (Lea, 1834) = Diplodon delodontus
+ Unio wymanii Lea, 1860
+ Unio delodonta Lamarck, 1819

Diplodon (s.s.) lacteolus (Lea, 1834) = Diplodon wymanii

Diplodon (s.s.) mogymirim Ortmann, 1921 = Diplodon multistriatus

Diplodon (s.s.) parallelopipedon (Lea, 1834) = Diplodon parallelopipedon
+ Unio acutirostris Lea, 1866

Diplodon (s.s.) patagonicus (d’Orbigny, 1835) = Diplodon chilensis

Diplodon (s.s.) paulista (von Ihering, 1893) = Diplodon paulistus

Diplodon (s.s.) piceus (Lea, 1860) = Diplodon piceus

Diplodon (s.s.) rotundus Spix, 1827 = Diplodon rotundus

Diplodon (s.s.) simillimus Ortmann, 1921 = Diplodon martensi

Diplodon (s.s.) suavidicus (Lea, 1856) = Diplodon suavidicus

Diplodon (s.s.) trifidus (Lea, 1860) = Diplodon parallelopipedon

Diplodon (s.s.) uruguayensis (Lea, 1860) = Diplodon uruguayensis
+ Unio apprimus Lea, 1866

Diplodon (s.s.) vicarius Ortmann, 1921 = Diplodon vicarius

Fossula fossiculifera (d’Orbigny, 1835)

Hyria corrugata Lamarck, 1819 = Triplodon corrugatus
+ Hyria transversa Hupé, 1857

Iheringella balzani (von Ihering, 1893) = Haasica balzani

Leila castelnaudi (Hupé, 1857) = Leila blainvilliana

Monocondylaea hollandi Ortmann, 1921 = Monocondylaea corrientesensis

Monocondylaea lentiformis Lea, 1866 = Monocondylaea corrientesensis

Monocondylaea minuana d’Orbigny, 1835
+ Monocondyloea pazii Lea, 1866

Monocondylaea minuana parchappii d’Orbigny, 1835 = Monocondylaea parchappii

Monocondylaea obesa Ortmann, 1921 = Monocondylaea paraguayana

Monocondylaea paraguayana d’Orbigny, 1835

Mycetopoda siliquosa (Spix, 1827)
+ Mycetopoda bahia Ihering, 1910
+ Anodonta legumen Martens, 1888
+ Mycetopus clessini Ihering, 1893

Mycetopoda siliquosa (Spix, 1827) = Mycetopoda legumen

Mycetopoda staudingeri (von Ihering, 1890) = Mycetopoda siliquosa
+ Mycetopoda staudingeri var. aequatorialis Ihering, 1910

Mycetopoda subsinuata (Sowerby, 1868)

Prisodon alatus (Sowerby, 1869) = Prisodon syrmatophorus

Prisodon castelnaudi (Húpe, 1857) = Prisodon obliquus