| Family/Species | N | Long (mm) | Known Distribution | New Distribution | |||
| Min | Avg | Max | SD | ||||
| Mexican Pacific Transitional | |||||||
| ARCIDAE J. E. Gray, 1854 Barbatia illota (Sowerby, 1833) | 3 | 7.5 | 13.1 | 21.3 | 7.2 | Mexico: Gulf of California (Isla Angel de la Guarda, Puertecitos and San Felipe), Baja California Sur (Concepcion Bay), Sonora (Puerto Peñasco), Nayarit (San Blas) and Sinaloa (Mazatlan Bay). In an Island of Honduras. Panama: Coiba Island, Hato Island, Bays of Panama and Venado. Colombia. Ecuador: GalapagosIslands and Salinas. Peru: Lobitos. Brazil: Balneario of Camboriu, Nearitajai, Santa Catarina. (Keen 1971, Skoglund 2001, World Register of Marine Species, WMSDB-Worldwide Mollusk Species Data Base, DISCOVER LIFE and Ezqueda-Gonzáles et al., 2014) | Manzanillo 16˚50'27.90''N, 99˚54' 38.14''W La Angosta 16˚47'39.62''N, 99˚50'29.02''W |
| MYTILIDAE Rafinesque, 1815 Modiolus tumbezensis (Pilsbry & Olsson, 1935) | 1 | 6.1 |
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| Mexico (Nayarit). (Reguero y García-Cubas, 1988 and World Register of Marine Species) | Manzanillo 16˚50'27.90''N, 99˚54'38.14''W |
| LUCINIDAE J. Fliming, 1828 Ctena clarionensis (Hertlein & Strong, 1946) | 1 | 9.7 |
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| Mexico: On the West Coast, Clarion Island, Gulf of California, Rocas Alijos Rocks, San Carlos Bay, Sonora); Costa Rica: Cocos Island. Ecuador: Galapagos Islands. (Keen 1971, Skoglund 2001, World Register of Marine Species and WMSDB-Worldwide Mollusc Species Data Base) | Manzanillo 16˚50'27.90''N, 99˚54'38.14''W |
| PHOLADIDAE Lamarck, 1809 Martesia (M) striata (Linnaeus, 1758) | 1 | 13.7 |
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| Mexico: On the Shores of the Pacific (Baja California and Sonora), Caribbean Sea, Gulf of Mexico. Costa Rica. Cuba. Puerto Rico. Tasmania. Lesser Antilles. United Kingdom. South Africa. Thailand and East China Sea. (Keen 1971, Skoglund 2001 and World Register of Marine Species and DISCOVER LIFE), | Manzanillo 16˚50'27.90''N, 99˚54'38.14''W |
| State of Guerrero | |||||||
| CARDITIDAE Férussac, 1822 Cardites laticostatus (Sowerby I, 1833) | 1 | 16.7 |
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| Mexico: Sinaloa (NavachisteIslands), Colima (Revillagigedo Islands); El Salvador. Panama (Panama Bay, Governor Island, CebacoIslands Puna Island, Gulf of Montijo and Venado Islands); Costa Rica (Cocos Island); Ecuador (Galapagos Islands). (Skoglund 2001, Keen 1971, Ortiz-Arellano and Flores-Campaña 2008, WMSDB-Worldwide Mollusc Species Data Base and DISCOVER LIFE) | Manzanillo 16˚50'27.90''N, 99˚54'38.14''W |
| Marine Priority Region 32 | |||||||
| ARCIDAE J. E. Gray, 1854 Barbatia (C) reeveana (d‘Orbigny, 1846) | 5 | 11.99 | 25.20 | 36.45 | 11.31 | Mexico: Rocas Alijos, Gulf of California (Puertecitos), Baja California Sur (Bahía Concepción) and Guerrero (La barrita and Zihuatanejo). Panama. Costa Rica (Cocos Island). Colombia (Mal Pelo Islands). Ecuador (GalapagosIslands) and Peru (South of lobitos). (Salcedo et al. 1988, World Register of Marine Species, WMSDB-Worldwide Mollusc Species Data Base and DISCOVERI LIFE). | Manzanillo 16˚50'27.90''N, 99˚54'38.14''W Muelle 16˚50'58.27''N, 99˚54'01.85''W |