11/16/2025
𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑖𝑠𝑎𝑎𝑐𝑖 (L274) and 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑞𝑢𝑖𝑙𝑜𝑚𝑏𝑜𝑙𝑎 (L384) two beautiful loricariid catfish are described from the rio Trombetas basin, Pará, Brazil. Both species have been known since the 1980s, imported into the hobby as 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑠𝑝. L274 and 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑠𝑝. L384 respectively.
“Despite of occurring in a protected area, previous studies on hydroelectric plants for the rio Trombetas, as the Hydropower Plant of Cachoeira Porteira, are being re-examined by current authorities, raising deep concerns on the future conservation of the unique biodiversity of the rio Trombetas basin.”
𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
Two new species of the ornamental loricariid genus 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 (Siluriformes: Hypostominae) from rio Trombetas basin, Pará, Brazil
Open-access - https://www.scielo.br/j/ni/a/7xyxCY4BKPrbpGtnbbtwYJj/
𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Oliveira, R. R. de ., & Rapp Py-Daniel, L. H.. (2025). Two new species of the ornamental loricariid genus 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 (Siluriformes: Hypostominae) from rio Trombetas basin, Pará, Brazil. Neotropical Ichthyology, 23(3), e250066. https://doi.org/10.1590/1982-0224-2025-0066
𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
Two new species of 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 are described from the rio Trombetas basin. These new species were collected in the late 1980’s and were analyzed morphologically and compared to the eight currently assigned species of 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠.
Both new species are distinguished from their congeners by a set of non-unique characters, such as coloration, extension of dorsal-fin membrane, abdominal covering, number of mandibular teeth and size of fins. These new species are only registered for strong-energy and clear waters, powerful cataracts, with rocky substrates, being sometimes, syntopic. The patterns of distribution and morphological features among all 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 species are discussed, and an identification key is presented.
Despite of occurring in a protected area, previous studies on hydroelectric plants for the rio Trombetas, as the Hydropower Plant of Cachoeira Porteira, are being re-examined by current authorities, raising deep concerns on the future conservation of the unique biodiversity of the rio Trombetas basin.
𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑖𝑠𝑎𝑎𝑐𝑖 - The specific name, a noun (masculine, singular), honours Isaäc Isbrücker, for his contribution to the knowledge of Neotropical Ichthyology, especially loricariids. Isaäc is an excellent ichthyologist and aquarist, and an example of resilience against preconceived ideas, deserving to be honoured by his extreme talent and knowledge on loricariids. He has dedicated a relevant part of his career as ichthyologist sharing his knowledge with the academia and general aquarium experts. A noun in a genitive case.
𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑞𝑢𝑖𝑙𝑜𝑚𝑏𝑜𝑙𝑎 - The specific name 𝑞𝑢𝑖𝑙𝑜𝑚𝑏𝑜𝑙𝑎 (a noun in the nominative singular standing in apposition to the generic name) honors the Quilombola’s communities of the rio Trombetas, also called Quilombos. Quilombolas are Afro-Brazilian descendents that escaped from slavery, or after abolition of slavery, that organized agrarian communities according to cultural, religious and geographic backgrounds in different areas in Brazil. The presence of large quilombos in the Amazon and, particularly, in the rio Trombetas basin deserves recognition, as the first Quilombo fully recognized by the Brazilian government was in rio Trombetas (Duque, 2009). They are eximious fishermen and profound connoisseurs of the dangerous waters in the rio Trombetas, as well as important activists of the Quilombola cause in South America.
𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Top - 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑖𝑠𝑎𝑎𝑐𝑖, uncatalogued specimen, from Cachoeira da Enseada, Oriximiná, Pará, Brazil. Live specimen (Photo: Douglas A. Bastos).
Bottom - 𝐵𝑎𝑟𝑦𝑎𝑛𝑐𝑖𝑠𝑡𝑟𝑢𝑠 𝑞𝑢𝑖𝑙𝑜𝑚𝑏𝑜𝑙𝑎, INPA-ICT 52435, paratype, 119.4 mm SL, from rio Trombetas, Oriximiná, Pará. Photo: Douglas A. Bastos.
Copyright © 2025 the Author(s). Published in the Neotropical Ichthyology journal. This paper is released under a Creative Commons Attribution 4.0 International (CC-BY-4.0) licence. https://creativecommons.org/licenses/by/4.0/
