𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠 𝑡𝑜𝑟𝑟𝑒𝑛𝑡𝑖𝑐𝑜𝑙𝑎, a new species of rheophilic loricariid catfish is described from the Manhuaçu River, Doce River Basin, Eastern Brazil. This new species compared to congeners from the Doce River basin has traits that represent important adaptations for living in torrential habitats.
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𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
A New Small-Sized 𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠 (Siluriformes: Loricariidae) from the Manhuaçu River, Doce River Basin, Minas Gerais State, Eastern Brazil
𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Edson H. L. Pereira, Tiago C. Pessali, Roberto E. Reis. A New Small-Sized 𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠 (Siluriformes: Loricariidae) from the Manhuaçu River, Doce River Basin, Minas Gerais State, Eastern Brazil, Ichthyology & Herpetology, 112(1), 69-75, (13 March 2024). DOI: https://doi.org/10.1643/i2023058
𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
We report the first record of a species of 𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠 in the Manhuaçu River basin, an affluent to the right bank of the middle Doce River drainage in eastern Brazil.
The description is based on a series of specimens recently collected and also on historical samples. All specimens were obtained from habitats with very strong water current running over flat bedrock. The new species is readily diagnosed from congeners by features related to the distinct morphology of lower lip papillae, unique pattern of plates covering the pectoral girdle between insertions of pectoral fins, and the lack of a maxillary barbel. In addition, the combination of longer snout, smaller orbital diameter, shape of the pectoral-fin spine, low number of dentary teeth, and lack of a dorsal-fin spinelet also distinguishes the new species from all species of 𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠.
The new species is further compared to 𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠 𝑛𝑎𝑠𝑢𝑡𝑎, 𝑃. 𝑠𝑐𝑢𝑡𝑢𝑙𝑎, 𝑃. 𝑝𝑟𝑜𝑠𝑘𝑦𝑛𝑖𝑡𝑎, and 𝑃. 𝑣𝑒𝑡𝑢𝑙𝑎, congeners from the Doce River basin, and hypothesized to have traits that represent important adaptations for living in torrential habitats.
𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠 𝑡𝑜𝑟𝑟𝑒𝑛𝑡𝑖𝑐𝑜𝑙𝑎, from the Latin 𝑡𝑜𝑟𝑟𝑒𝑛, -𝑒𝑛𝑡𝑖𝑠, meaning swift or violent stream, torrent, torrential, and -𝑐𝑜𝑙𝑎 meaning dweller, inhabitant, in allusion to its habit of living in very strong waters. A noun in apposition.
𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Top – 𝑃𝑎𝑟𝑒𝑖𝑜𝑟ℎ𝑎𝑝ℎ𝑖𝑠 𝑡𝑜𝑟𝑟𝑒𝑛𝑡𝑖𝑐𝑜𝑙𝑎, MCP 55010, holotype, 37.4 mm SL, male. Brazil, Minas Gerais State, Alvarenga, Padre Angelo Creek near its mouth in Manhuaçu River, Doce River basin.
Bottom – Padre Angelo Creek near its mouth in Manhuaçu River, Alvarenga, Minas Gerais State, Brazil.
Copyright © 2024 the Author(s). Published in Ichthyology & Herpetology journal.