Giant otter

Cordillera Cutucu Occidental

Ecuador

Cordillera Cutucú Oriental

Ecuador, Peru

Cerros Campanquís

Ecuador, Peru

Guiana Shield

Brazil, Colombia, French Guiana, Guyana, Suriname, Venezuela

Guiana Highlands

Brazil, Colombia, Guyana, Venezuela

Tepuis Orientales

Brazil, Guyana, Venezuela

Iwokrama Mountains

Guyana

Pacaraima Mountains (nn)

Brazil, Guyana, Venezuela

Southeastern Guiana Highlands

Brazil, Guyana

Kamoa Mountains

Brazil, Guyana

Kanuku Mountains

Guyana

Serra da Mocidade

Brazil

Acarai Mountains

Brazil, Guyana

Southeastern Guiana Highlands (nn)

Brazil, Guyana

Northwestern Guyana Highlands

Venezuela

Cerro Quinigua

Venezuela

Serranía de Mata

Venezuela

Serranía Paru

Venezuela

Sierra de la Cerbatana

Venezuela

Cuao-Sipapo Massif

Venezuela

Serranía Guayapo

Venezuela

Serranía Mapiche

Venezuela

Serranía de Parguaza

Venezuela

Serranía Turagua

Venezuela

Southwestern Guiana Highlands

Brazil, Venezuela

Cerro Duida

Venezuela

Pico da Neblina

Brazil, Venezuela

Serra Curupira

Brazil, Venezuela

Serra do Imeri

Brazil, Venezuela

Serra Tulu-Tuloi

Brazil

Sierra de Unturan

Venezuela

Sierra Tapirapeco

Brazil, Venezuela

Serra Parima

Brazil, Venezuela

Serra Parima (nn)

Brazil, Venezuela

Serranía de Chiribiquete

Colombia

Sierra de Tunahí

Colombia

Serranía de Caranacoa

Colombia

Serra do Macaco

Brazil, Colombia

Tumucumaque Uplands

Brazil, French Guiana, Suriname

Wilhelmina Mountains

Brazil, Suriname

Bakhuis Mountains

Suriname

Eilerts de Haan Mountains

Brazil, Suriname

Emma Range

Suriname

Kayser Mountains

Suriname

Wilhelmina Mountains (nn)

Suriname

Tumuk Humak Mountains

Brazil, French Guiana, Suriname

Tumuk Humak Mountains (nn)

Brazil, French Guiana, Suriname

Van Asch Van Wijckgebergte

Suriname

Massif Central Guyanais

French Guiana, Suriname

Lely Mountains

Suriname

Montagnes Inini-Camopi

French Guiana

Massif Dékou-Dékou

French Guiana

Montagnes françaises

French Guiana, Suriname

Montagnes de la Sparouine

French Guiana

Monts Itoupé

French Guiana

Brownsberg

Suriname

Nassau Mountains

Suriname

De Goeie Mountain

Suriname

Oranje Mountains

Brazil, Suriname

Highlands North of the Amazon

Brazil

Serra Juarú

Brazil

Serra Maicuru

Brazil

Serra da Canastra

Brazil

Serra do Angelim

Brazil

Serra do Gandarela

Brazil

Serra do Cipó

Brazil

Serra Negra (NE Brazil)

Brazil

Serra do Cuscuzeiro

Brazil

Serra de Batatais

Brazil

Atlantic Plateau (nn)

Brazil

Central Highland (Brazil)

Bolivia, Brazil, Peru, Paraguay

Highlands South of the Amazon

Brazil, Peru

Serra dos Carajás

Brazil

Serra do Cachimbo

Brazil

Serra dos Gradaús

Brazil

Highlands South of the Amazon (nn)

Brazil

Sierra del Divisor

Brazil, Peru

Central Brazilian Highland

Brazil

Serra Geral de Goiás

Brazil

Chapada dos Veadeiros

Brazil

Serra de Arraias

Brazil

Chapada dos Veadeiros (nn)

Brazil

Serra Dourada

Brazil

Serra das Divisões

Brazil

Serra da Ponte Alta

Brazil

Serra Geral do Paraná

Brazil

Serra dos Pirineus

Brazil

Serra Paratodos

Brazil

Serra São Domingos

Brazil

Chapada dos Pilões

Brazil

Central Brazilian Highland (nn)

Brazil

Chapadas do Rio São Fransisco

Brazil

Serra dos Fonsecas

Brazil

Serra do Cabral

Brazil

Serra da Saudade

Brazil

Serra da Tiririca

Brazil

Chapada Occidental da Bahia

Brazil

Parecis Highland

Brazil

Serra dos Pacaás Novos

Brazil

Parecis Highland (nn)

Brazil

Serras dos Rios Paraguai / Guaporé

Bolivia, Brazil, Paraguay

Serra Santa Bárbara

Brazil

Serra de Amambai

Paraguay

Serra da Bodoquena

Brazil

Serra das Araras

Brazil

Serranía de Huanchaca

Bolivia, Brazil

Serra da Borda

Brazil

Serranía de San Simón

Bolivia

Guimarães Highlands

Brazil

Chapada dos Guimarães

Brazil

Serra Azul

Brazil

Serra de São Lourenço

Brazil

Serra de São Jerônimo

Brazil

Guimarães Highlands (nn)

Brazil

Chapada das Mangabeiras

Brazil

Serra do Estrondo

Brazil

Serra dos Javaés

Brazil

Serra do Lajeado

Brazil

Chapada do Araripe

Brazil

Cordillera Cutucu Occidental Ecuador
Cordillera Cutucú Oriental Ecuador, Peru
Cerros Campanquís Ecuador, Peru
Guiana Shield Brazil, Colombia, French Guiana, Guyana, Suriname, Venezuela
Guiana Highlands Brazil, Colombia, Guyana, Venezuela
Tepuis Orientales Brazil, Guyana, Venezuela
Iwokrama Mountains Guyana
Pacaraima Mountains (nn) Brazil, Guyana, Venezuela
Southeastern Guiana Highlands Brazil, Guyana
Kamoa Mountains Brazil, Guyana
Kanuku Mountains Guyana
Serra da Mocidade Brazil
Acarai Mountains Brazil, Guyana
Southeastern Guiana Highlands (nn) Brazil, Guyana
Northwestern Guyana Highlands Venezuela
Cerro Quinigua Venezuela
Serranía de Mata Venezuela
Serranía Paru Venezuela
Sierra de la Cerbatana Venezuela
Cuao-Sipapo Massif Venezuela
Serranía Guayapo Venezuela
Serranía Mapiche Venezuela
Serranía de Parguaza Venezuela
Serranía Turagua Venezuela
Southwestern Guiana Highlands Brazil, Venezuela
Cerro Duida Venezuela
Pico da Neblina Brazil, Venezuela
Serra Curupira Brazil, Venezuela
Serra do Imeri Brazil, Venezuela
Serra Tulu-Tuloi Brazil
Sierra de Unturan Venezuela
Sierra Tapirapeco Brazil, Venezuela
Serra Parima Brazil, Venezuela
Serra Parima (nn) Brazil, Venezuela
Serranía de Chiribiquete Colombia
Sierra de Tunahí Colombia
Serranía de Caranacoa Colombia
Serra do Macaco Brazil, Colombia
Tumucumaque Uplands Brazil, French Guiana, Suriname
Wilhelmina Mountains Brazil, Suriname
Bakhuis Mountains Suriname
Eilerts de Haan Mountains Brazil, Suriname
Emma Range Suriname
Kayser Mountains Suriname
Wilhelmina Mountains (nn) Suriname
Tumuk Humak Mountains Brazil, French Guiana, Suriname
Tumuk Humak Mountains (nn) Brazil, French Guiana, Suriname
Van Asch Van Wijckgebergte Suriname
Massif Central Guyanais French Guiana, Suriname
Lely Mountains Suriname
Montagnes Inini-Camopi French Guiana
Massif Dékou-Dékou French Guiana
Montagnes françaises French Guiana, Suriname
Montagnes de la Sparouine French Guiana
Monts Itoupé French Guiana
Brownsberg Suriname
Nassau Mountains Suriname
De Goeie Mountain Suriname
Oranje Mountains Brazil, Suriname
Highlands North of the Amazon Brazil
Serra Juarú Brazil
Serra Maicuru Brazil
Serra da Canastra Brazil
Serra do Angelim Brazil
Serra do Gandarela Brazil
Serra do Cipó Brazil
Serra Negra (NE Brazil) Brazil
Serra do Cuscuzeiro Brazil
Serra de Batatais Brazil
Atlantic Plateau (nn) Brazil
Central Highland (Brazil) Bolivia, Brazil, Peru, Paraguay
Highlands South of the Amazon Brazil, Peru
Serra dos Carajás Brazil
Serra do Cachimbo Brazil
Serra dos Gradaús Brazil
Highlands South of the Amazon (nn) Brazil
Sierra del Divisor Brazil, Peru
Central Brazilian Highland Brazil
Serra Geral de Goiás Brazil
Chapada dos Veadeiros Brazil
Serra de Arraias Brazil
Chapada dos Veadeiros (nn) Brazil
Serra Dourada Brazil
Serra das Divisões Brazil
Serra da Ponte Alta Brazil
Serra Geral do Paraná Brazil
Serra dos Pirineus Brazil
Serra Paratodos Brazil
Serra São Domingos Brazil
Chapada dos Pilões Brazil
Central Brazilian Highland (nn) Brazil
Chapadas do Rio São Fransisco Brazil
Serra dos Fonsecas Brazil
Serra do Cabral Brazil
Serra da Saudade Brazil
Serra da Tiririca Brazil
Chapada Occidental da Bahia Brazil
Parecis Highland Brazil
Serra dos Pacaás Novos Brazil
Parecis Highland (nn) Brazil
Serras dos Rios Paraguai / Guaporé Bolivia, Brazil, Paraguay
Serra Santa Bárbara Brazil
Serra de Amambai Paraguay
Serra da Bodoquena Brazil
Serra das Araras Brazil
Serranía de Huanchaca Bolivia, Brazil
Serra da Borda Brazil
Serranía de San Simón Bolivia
Guimarães Highlands Brazil
Chapada dos Guimarães Brazil
Serra Azul Brazil
Serra de São Lourenço Brazil
Serra de São Jerônimo Brazil
Guimarães Highlands (nn) Brazil
Chapada das Mangabeiras Brazil
Serra do Estrondo Brazil
Serra dos Javaés Brazil
Serra do Lajeado Brazil
Chapada do Araripe Brazil

Pteronura brasiliensis Zimmermann, 1780