A redescription of Bryconops gracilis is provided, a species poorly known for more than a century. Bryconops gracilis differs from all congeners by having the following combination of features: eight branched pelvic-fin rays, 31–36 anal-fin rays, 15–17 predorsal scales arranged in a regular series, two rows of premaxillary teeth, and 53–60 lateral-line scales. The species was often misidentified as B. alburnoides by sharing an overall elongated body shape, caudal fin yellowish in life, and a high number of lateral-line scales. A diagnosis between B. alburnoides and B. gracilis is provided. The holotype of B. gracilis which for many years had whereabouts unknown, was recovered, examined and illustrated by CT-Scan. Additionally, more detailed information about the type locality, morphology, color pattern (including in living specimens), habitat and distribution pattern of species are provided.
CITATION STYLE
Silva-Oliveira, C., Ota, R. P., Lima, F. C. T., & Py-Daniel, L. R. (2021). Rediscovering species: redescription of Bryconops gracilis (Characiformes: Iguanodectidae), an often-misidentified species. Neotropical Ichthyology, 19(4). https://doi.org/10.1590/1982-0224-2021-0054
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