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Methanogenic Activity in Neotropical Lacustrine Systems at Different Altitudes
Joyce Andrade, Andrés Calderón, Marcos Hidalgo, and Jaime Martí-Herrero

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Structure and regional representativeness of the herpetofauna from Parque Estadual da Serra de Caldas Novas, Cerrado, Central Brazil
Werther P. Ramalho, Rafael F. Jorge, Tarcilla V. C. Guimarães, Ricardo A. P. Pires, Alfredo P. Peña, and Vinicius Guerra

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Climate Change Influence on the Distribution of Four Plant Medicinal Species from the Sierra Norte of Oaxaca, Mexico
Irene Bautista Juárez, José Luis Villaseñor, Monserrat Vázquez-Sánchez, Wenceslao Santiago-García, Faustino Ruiz-Aquino, and Mario Ernesto Suárez-Mota

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Phytoseiid mites (Acari: Phytoseiidae) in the northern coastal region of the Rio Grande do Sul State, Brazil
Matheus dos Santos Rocha, Guilherme Liberato da Silva, Juliana Oliveira da Silva, Elisete Maria de Freitas, and Noeli Juarez Ferla

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Herpetofauna of the Reserva de la Biósfera Estación Biológica del Beni and the Chimane Reserve Indigenous Territory, Bolivia
Cord B. Eversole, Randy L. Powell, Dennis Lizarro, Ashton V. Crocker, Gonzalo Calderón Vaca, and Paola De La Quintana

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Molecular phylogeny of stream treefrogs (Hylidae: Hyloscirtus bogotensis Group), with a new species from the Andes of Ecuador
Juan M. Guayasamin, Mauricio Rivera-Correa, Alejandro Arteaga, Jaime Culebras, Lucas Bustamante, R. Alexander Pyron, Nicolás Peñafiel, Carlos Morochz, and Carl R. Hutter

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Water mites (Acari, Hydrachnidia): powerful but widely neglected bioindicators – a review
Tom Goldschmidt

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New species of arboreal rat of the genus Rhipidomys (Cricetidae, Sigmodontinae) from Sangay National Park, Ecuador
Jorge M. Brito, Nicolás Tinoco, Daniel Chávez, Pablo Moreno-Cárdenas, Diego Batallas, and Reed Ojala-Barbour

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An island invaded by exotics: a review of freshwater fish in Puerto Rico
Ruber Rodríguez-Barreras, Camille Zapata-Arroyo, Wilfredo Falcón L., and María De Lourdes Olmeda

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Description of two new species of the Neotropical genus Yphthimoides Forster, 1964 (Lepidoptera: Nymphalidae: Satyrinae) from the ‘renata clade’
Eduardo Barbosa, Mario Marín, Carlos Eduardo Giraldo, Sandra Uribe, and André Freitas