132 BULLETIN AMERICAN MUSEUM OF NATURAL HISTORY NO. 431 Taxon Species Occurrence Parotocinclus polyochrus Negro, upper Orinoco Parotocinclus variola* Endemic – Amazonas main channel Parotocinclus yaka* Endemic – Negro Peckoltia braueri* Branco, Amazonas main channel Peckoltia brevis* Lower Tocantins, Mamoré, Guaporé, Purus, Juruá, Amazonas main channel Peckoltia cavatica Tapajós, Essequibo Peckoltia compta* Restricted to Tapajós basin (Tapajós, Jamanxim) Peckoltia ephippiata* Endemic – Madeira Shield Tributaries Peckoltia furcata* Ucayali, Marañon-Nanay, Amazonas main channel Peckoltia multispinis** Peckoltia oligospila Upper Tocantins, lower Tocantins, Capim Peckoltia pankimpuju* Endemic – Amazonas main channel Peckoltia relictum* Endemic – Marañon Peckoltia sabaji Lower Xingu, Teles Pires, Tapajós, Negro, Branco, Jari, Essequibo, upper Orinoco Peckoltia vermiculata** Upper Tocantins, Araguaia, lower Tocantins, Anapu, upper Xingu, Iriri, lower Xingu, Tapajós, Beni-Madre de Dios, middle-lower Madeira, Madeira Shield Peckoltia vittata Tributaries, Urubu-Uatumã, Trombetas, Amazonas main channel, Amazonas Estuary, Gurupi-Turiaçu, Capim, upper Orinoco Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Purus, Juruá, Ucayali, Peckoltichthys bachi Marañon-Nanay, Napo-Ambyiacu, Putumayo, Amazonas main channel, upper Orinoco Mamoré, Guaporé, Beni-Madre de Dios, middle-lower Madeira, Purus, Putumayo, Planiloricaria cryptodon* Amazonas main channel Lower Tocantins, upper Xingu, lower Xingu, Purus, Japurá, lower Orinoco, upper Pseudacanthicus histrix** Orinoco, Apure Pseudacanthicus leopardus Upper Xingu, lower Xingu, Branco, Essequibo Pseudacanthicus major* Restricted to Tocantins basin (upper Tocantins, lower Tocantins) Pseudacanthicus pirarara* Restricted to Xingu basin (upper Xingu, Iriri, lower Xingu) Pseudacanthicus pitanga* Restricted to Tocantins basin (upper Tocantins, lower Tocantins) Upper Tocantins, lower Tocantins, Maroni-Approuague, Coppename-Suriname- Pseudacanthicus serratus Saramacca, Essequibo Lower Tocantins, Anapu, Pacajá, upper Xingu, lower Xingu, Negro, Urubu-Uatumã, Pseudacanthicus spinosus Amazonas main channel, Amazonas Estuary, Capim, lower Orinoco Pseudancistrus asurini* Restricted to Xingu basin (Iriri, lower Xingu) Pseudancistrus kayabi* Endemic – Teles Pires Pseudancistrus nigrescens Branco, Essequibo Pseudancistrus pectegenitor Negro, upper Orinoco Pseudancistrus sidereus Negro, upper Orinoco Pseudancistrus zawadzkii* Endemic – Tapajós Pseudohemiodon amazonum* Endemic – Trombetas Pseudohemiodon apithanos* Endemic – Putumayo Pseudohemiodon lamina* Beni-Madre de Dios.