116 BULLETIN AMERICAN MUSEUM OF NATURAL HISTORY NO. 431

Taxon Species Occurrence Mamoré, Beni-Madre de Dios, middle-lower Madeira, Madeira Shield Tributaries, Leptodoras linnelli Negro, Branco, Urubu-Uatumã, Araguari-Macari-Amapá, Corentyne-Demerara, Essequibo, upper Orinoco Leptodoras marki* Endemic – upper Xingu Leptodoras myersi* Mamoré, middle-lower Madeira, Amazonas main channel Leptodoras oyakawai* Upper Xingu, lower Xingu, Teles Pires, Jamanxim Upper Tocantins, lower Xingu, Teles Pires, Mamoré, middle-lower Madeira, Negro, Leptodoras praelongus Branco, Jari, Amazonas main channel, upper Orinoco Lithodoras dorsalis Purus, Amazonas main channel, Amazonas Estuary, Capim Upper Tocantins, Araguaia, lower Tocantins, Iriri, lower Xingu, Teles Pires, Tapajós, Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Purus, Juruá, Megalodoras uranoscopus Ucayali, Putumayo, Japurá, Branco, Urubu-Uatumã, Trombetas, Amazonas main channel, Essequibo, lower Orinoco, Apure Beni-Madre de Dios, middle-lower Madeira, Purus, Marañon-Nanay, Amazonas Nemadoras cristinae main channel, upper Orinoco Middle-lower Madeira, Purus, Tefé, Juruá, Putumayo, Japurá, Negro, Branco, Nemadoras elongatus* Urubu-Uatumã, Amazonas main channel Nemadoras hemipeltis* Middle-lower Madeira, Ucayali, Urubu-Uatumã, Amazonas main channel Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Purus, Juruá, Nemadoras humeralis* Ucayali, Marañon-Nanay, Putumayo, Japurá, Negro, Amazonas main channel Opsodoras boulengeri* Mamoré, Guaporé, middle-lower Madeira, Trombetas, Amazonas main channel Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Marañon-Nanay, Opsodoras stuebelii* Japurá, Negro, Amazonas main channel Tapajós, Mamoré, Guaporé, middle-lower Madeira, Ucayali, Marañon-Nanay, Ossancora asterophysa* Negro, Trombetas, Amazonas main channel, Amazonas Estuary Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Tefé, Negro, Ossancora fimbriata* Branco, Urubu-Uatumã, Trombetas, Amazonas main channel Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Purus, Ucayali, Ossancora punctata Marañon-Nanay, Amazonas main channel, Paraná-Paraguay Upper Tocantins, Araguaia, lower Tocantins, upper Xingu, Teles Pires, Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Purus, Tefé, Ucayali, Oxydoras niger Putumayo, Japurá, Branco, Amazonas main channel, Essequibo, lower Orinoco, upper Orinoco, Apure Anapu, Tapajós, middle-lower Madeira, Madeira Shield Tributaries, Purus, Juruá, Physopyxis ananas Jutaí, Marañon-Nanay, Negro, Branco, Trombetas, Essequibo, upper Orinoco Physopyxis cristata* Restricted to Negro basin (Negro, Branco) Mamoré, Guaporé, middle-lower Madeira, Madeira Shield Tributaries, Purus, Physopyxis lyra* Putumayo, Negro, Urubu-Uatumã, Amazonas main channel Araguaia, lower Tocantins, lower Xingu, Teles Pires, Mamoré, Guaporé, Beni-Madre Platydoras armatulus de Dios, middle-lower Madeira, Ucayali, Japurá, Urubu-Uatumã, Amazonas main channel, lower Orinoco, upper Orinoco, Apure, Paraná-Paraguay Platydoras birindelli* Restricted to Xingu basin (upper Xingu, Iriri, lower Xingu) Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Putumayo, Negro, Platydoras hancockii Branco, Corentyne-Demerara, Essequibo, upper Orinoco Upper Tocantins, Araguaia, lower Tocantins, upper Xingu, lower Xingu, Teles Pires, Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Purus, Tefé, Juruá, Pterodoras granulosus Ucayali, Marañon-Nanay, Putumayo, Japurá, Negro, Amazonas main channel, Paraná-Paraguay