Subgenus (Cyrena) J. B. P. A. de Lamarck, 1818

(3-4-4-0-9-1-0-18-2-0-0-0-0)

acuta T. Prime, 1861
(3-4-4-0-9-1-0-18-2-1-0-0-0)
[=Polymesoda (Polymesoda) acuta (T. Prime, 1861)]
Ref. Bernard, 1983 p 50

altilis ex Busch, ms, A. A. Gould, 1853
(3-4-4-0-9-1-0-18-2-2-0-0-0)
[=Polymesoda (Egeta) altilis (A. A. Gould, 1853)]
Ref. Bernard, 1983 p 50

angulata G. P. Deshayes, 1855 [not E. Romer, 1835]
(3-4-4-0-9-1-0-18-2-3-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112

anomala G. P. Deshayes, 1855
(3-4-4-0-9-1-0-18-2-4-0-0-0)
[=Polymesoda (Egeta) anomala (G. P. Deshayes, 1855)]
Ref. Bernard, 1983 p 50

boliviana R. A. Philippi, 1851
(3-4-4-0-9-1-0-18-2-5-0-0-0)
[=Polymesoda (Neocyrena) boliviana (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50

bullata authors [not G. B. Sowerby in L. A. Reeve, 1878]
(3-4-4-0-9-1-0-18-2-6-0-0-0)
[=Polymesoda (Polymesoda) mexicana (W. J. Broderip & G. B. Sowerby, 1829]
Ref. Bernard, 1983 p 50

bullata G. B. Sowerby in L. A. Reeve, 1878
(3-4-4-0-9-1-0-18-2-7-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50

cardiformis ex G. P. Deshayes, ms, G. B. Sowerby in L. A. Reeve, 1878
(3-4-4-0-9-1-0-18-2-8-0-0-0)
[=Polymesoda (Egeta) anomala (G. P. Deshayes, 1855)]
Ref. Bernard, 1983 p 50
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Keen, 1971 p 112

chilina T. Prime, 1867[1870]
(3-4-4-0-9-1-0-18-2-9-0-0-0)
[=Polymesoda (Neocyrena) fontaineii (A. d'Orbigny, 1844)]
Ref. Bernard, 1983 p 50
[=Polymesoda (Neocyrena) fontainei (A. d'Orbigny, 1844)]
Ref. Keen, 1971 p 114

cordiformis C. A. Recluz, 1853 [not G. P. Deshayes, 1824]
(3-4-4-0-9-1-0-18-2-10-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
[=Cyrena (Cyrena) recluzii T. Prime, 1865]
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Keen, 1971 p 112

dura G. P. Deshayes, 1855
(3-4-4-0-9-1-0-18-2-11-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112

exquisita T. Prime, 1867[1870]
(3-4-4-0-9-1-0-18-2-12-0-0-0)
[=Polymesoda (Neocyrena) boliviana (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 114

floridana authors [not T. A. Conrad, 1846]
(3-4-4-0-9-1-0-18-2-13-0-0-0)
[=Polymesoda (Polymesoda) mexicana (W. J. Broderip & G. B. Sowerby, 1829)]
Ref. Bernard, 1983 p 50

fontaineii A. d'Orbigny, 1844
(3-4-4-0-9-1-0-18-2-14-0-0-0)
[=Polymesoda (Neocyrena) fontaineii (A. d'Orbigny, 1844)]
Ref. Bernard, 1983 p 50

fontainei [fontaineii] R. A. Philippi, 1851 [not A. d'Orbigny, 1844]
(3-4-4-0-9-1-0-18-2-15-0-0-0)
[=Polymesoda (Egeta) altilis (A. A. Gould, 1853)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112

fortis T. Prime, 1861
(3-4-4-0-9-1-0-18-2-16-0-0-0)
[=Polymesoda (Neocyrena) fontaineii (A. d'Orbigny, 1844)]
Ref. Bernard, 1983 p 50
[=Polymesoda (Neocyrena) fontainei (A. d'Orbigny, 1844)]
Ref. Keen, 1971 p 114

fragilis ex G. P. Deshayes, ms, G. P. Sowerby, 1878 [G. B. Sowerby in L. A. Reeve, 1878]
(3-4-4-0-9-1-0-18-2-17-0-0-0)
[=Polymesoda (Polymesoda) mexicana (W. J. Broderip & G. B. Sowerby, 1829)]
Ref. Ref. Bernard, 1983 p 50
Keen, 1971 p 112

germana T. Prime, 1867[1870]
(3-4-4-0-9-1-0-18-2-18-0-0-0)
[=Polymesoda (Neocyrena) ordinaria (T. Prime, 1865)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 114

inflata G. P. Deshayes, 1855 [not R. A. Philippi, 1851]
(3-4-4-0-9-1-0-18-2-19-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
[=Cyrena (Cyrena) panamensis T. Prime, 1860]
Ref. Keen, 1971 p 112

inflata R. A. Philippi, 1851
(3-4-4-0-9-1-0-18-2-20-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50

insignis G. P. Deshayes, 1855
(3-4-4-0-9-1-0-18-2-21-0-0-0)
[=Polymesoda (Polymesoda) mexicana (W. J. Broderip & G. B. Sowerby, 1829)]
Ref. Bernard, 1983 p 50

isocardioides G. P. Deshayes, 1855
(3-4-4-0-9-1-0-18-2-22-0-0-0)
[=Polymesoda (Egeta) anomala (G. P. Deshayes, 185)]
Ref. Keen, 1971 p 112

maritima C. B. Adams [not A. d'Orbigny, 1842]
(3-4-4-0-9-1-0-18-2-23-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112

meridionalis T. Prime, 1865
(3-4-4-0-9-1-0-18-2-24-0-0-0)
[=Polymesoda (Neocyrena) meridionalis (T. Prime, 1865)]
Ref. Bernard, 1983 p 50

mexicana W. J. Broderip & G. B. Sowerby, 1829
(3-4-4-0-9-1-0-18-2-25-0-0-0)
[=Polymesoda (Polymesoda) mexicana (W. J. Broderip & Sowerby, 1829)]
Ref. Bernard, 1983 p 50

nicaraguana T. Prime, 1869
(3-4-4-0-9-1-0-18-2-26-0-0-0)
[=Polymesoda (Neocyrena) nicaraguana (T. Prime, 1869)]
Ref. Bernard, 1983 p 50

nitidula G. P. Deshayes, 1855
(3-4-4-0-9-1-0-18-2-27-0-0-0)
[=Polymesoda (Polymesoda) mexicana (W. J. Broderip & G. B. Sowerby, 1829)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112

notabilis G. P. Deshayes, 1855
(3-4-4-0-9-1-0-18-2-28-0-0-0)
[=Polymesoda (Polymesoda) notabilis (G. P. Deshayes, 1855)]
Ref. Bernard, 1983 p 50

olivacea P. P. Carpenter, 1857
(3-4-4-0-9-1-0-18-2-29-0-0-0)
[=Polymesoda (Egeta) altilis (A. A. Gould, 1853)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112

ordinaria T. Prime, 1865
(3-4-4-0-9-1-0-18-2-30-0-0-0)
[=Polymesoda (Neocyrena) ordinaria (T. Prime, 1865)]
Ref. Bernard, 1983 p 50

panamensis T. Prime, 1861[1860]
(3-4-4-0-9-1-0-18-2-31-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Syn. Cyrena (Cyrena) inflata G. P. Deshayes, 1855 [not R. A. Philippi, 1851]
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Keen, 1971 p 112

peruviana G. P. Deshayes, 1855[1854]
(3-4-4-0-9-1-0-18-2-32-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
[=Polymesoda (Egeta) anomala (G. P. Deshayes, 1855)]
Ref. Keen, 1971 p 112

pullastra O. A. L. Morch, 1861
(3-4-4-0-9-1-0-18-2-33-0-0-0)
[=Polymesoda (Polymesoda) notabilis (G. P. Deshayes, 1855)]
Ref. Bernard, 1983 p 50

purpurea H. C. Lea, 1842
(3-4-4-0-9-1-0-18-2-34-0-0-0)
[=Gemma gemma (J. G. Totten, 1834)]
Ref. Bernard, 1983 p 56
[see under Superfamily: VENERACEA;
Family: VENERIDAE;
Subfamily: GEMMINAE]

radiata of authors [not S. C. T. Hanley, 1844, nor Parreys in R. A. Philippi, 1846]
(3-4-4-0-9-1-0-18-2-35-0-0-0)
[=Polymesoda (Neocyrena) nicaraguana (T. Prime, 1869)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 114

recluzii T. Prime, 1865
(3-4-4-0-9-1-0-18-2-36-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Syn. Cyrena (Cyrena) cordiformis C. A. Recluz, 1853 [not G. P. Deshayes, 1824]
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Keen, 1971 p 112

solida R. A. Philippi, 1847 [not W. Dunker, 1843]
(3-4-4-0-9-1-0-18-2-37-0-0-0)
[=Polymesoda (Neocyrena) nicaraguana (T. Prime, 1869)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 114

triangula of authors [not R. A. Philippi, 1849]
(3-4-4-0-9-1-0-18-2-38-0-0-0)
[=Polymesoda (Egeta) altilis (A. A. Gould, 1853)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112

triangula Busch in R. A. Philippi, 1849
(3-4-4-0-9-1-0-18-2-39-0-0-0)
[=Polymesoda (Neocyrena) triangula (Busch, 1849)]
Ref. Bernard, 1983 p 50

tribunalis T. Prime, 1870[1869]
(3-4-4-0-9-1-0-18-2-40-0-0-0)
[=Polymesoda (Neocyrena) boliviana (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 114

tumida T. Prime, 1860[1865]
(3-4-4-0-9-1-0-18-2-41-0-0-0)
[=Polymesoda (Egeta) inflata (R. A. Philippi, 1851)]
Ref. Bernard, 1983 p 50
Keen, 1971 p 112