156 BULLETIN AMERICAN MUSEUM OF NATURAL HISTORY NO. 431

Taxon Occurrence Heros severus Negro, upper Orinoco Heros spurius* Restricted to Madeira basin (Mamoré, Guaporé, middle-lower Madeira) Middle-lower Madeira, Putumayo, Japurá, Negro, Branco, Urubu-Uatumã, Hoplarchus psittacus Amazonas main channel, lower Orinoco, upper Orinoco, Apure Tapajós, Negro, Branco, Urubu-Uatumã, Trombetas, Amazonas main channel, lower Hypselecara coryphaenoides Orinoco, upper Orinoco, Apure Araguaia, lower Tocantins, upper Xingu, lower Xingu, Tapajós, middle-lower Madeira, Hypselecara temporalis Madeira Shield Tributaries, Purus, Juruá, Ucayali, Putumayo, Japurá, Branco, Urubu- Uatumã, Trombetas, Jari, Amazonas main channel, Amazonas Estuary, Capim, Oiapoque Ivanacara adoketa* Endemic – Negro Krobia xinguensis* Restricted to Xingu basin (upper Xingu, lower Xingu) Laetacara araguaiae Upper Tocantins, Araguaia, upper Xingu, Teles Pires, Tapajós, Paraná- Laetacara curviceps* Trombetas, Amazonas main channel, Capim Juruá, Javari, Ucayali, Marañon-Nanay, Napo-Ambyiacu, Putumayo, Japurá, Laetacara flavilabris* Amazonas main channel Laetacara fulvipinnis Negro, upper Orinoco Middle-lower Madeira, Purus, Coari-Urucu, Tefé, Marañon-Nanay, Negro, Laetacara thayeri* Amazonas main channel acora Upper Tocantins, Araguaia, lower Tocantins, upper Xingu, lower Xingu, Capim Araguaia, lower Tocantins, upper Xingu, lower Xingu, Tapajós, Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Madeira Shield Tributaries, Purus, Mesonauta festivus Putumayo, Japurá, Negro, Urubu-Uatumã, Trombetas, Amazonas main channel, Amazonas Estuary, Araguari-Macari-Amapá, Essequibo, upper Orinoco, Paraná- Paraguay Lower Tocantins, Tapajós, middle-lower Madeira, Negro, Branco, Amazonas main Mesonauta guyanae channel, Amazonas Estuary, Capim, Oiapoque, Coppename-Suriname-Saramacca, Corentyne-Demerara, Essequibo Guaporé, Beni-Madre de Dios, middle-lower Madeira, Putumayo, Negro, Branco, Urubu-Uatumã, Amazonas main channel, lower Orinoco, upper Orinoco, Apure * Ucayali, Putumayo, Japurá, Amazonas main channel Restricted to Madeira basin (Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Mikrogeophagus altispinosus* Madeira) Pterophyllum altum Negro, upper Orinoco Lower Tocantins, Putumayo, Negro, Branco, Amazonas main channel, Amazonas Pterophyllum leopoldi Estuary, Gurupi-Turiaçu, Essequibo Araguaia, lower Tocantins, lower Xingu, middle-lower Madeira, Purus, Javari, Ucayali, Pterophyllum scalare Putumayo, Japurá, Branco, Jari, Amazonas main channel, Amazonas Estuary, Capim, Oiapoque, Coppename-Suriname-Saramacca, Corentyne-Demerara, Essequibo Retroculus acherontos* Endemic – upper Tocantins Retroculus lapidifer Upper Tocantins, Araguaia, lower Tocantins, Capim Retroculus xinguensis* Upper Xingu, Iriri, lower Xingu, Tapajós, Jamanxim Rondonacara hoehnei* Endemic – Araguaia Beni-Madre de Dios, middle-lower Madeira, Purus, Japurá, Negro, Branco, Urubu- Satanoperca acuticeps* Uatumã, Trombetas, Amazonas main channel Satanoperca curupira* Endemic – Madeira Shield Tributaries Satanoperca daemon Putumayo, Japurá, Negro, lower Orinoco, upper Orinoco, Apure