Taxonomic revision of Hypostomus albopunctatus (Siluriformes: Loricariidae) reveals a new piece of the Hypostomus jigsaw in the upper Rio Paraná basin

Hypostomus albopunctatus was described from the Rio Piracicaba, a tributary of the Rio Tietê, upper Rio Paraná basin. Nevertheless, specimens attributed to this species are commonly found throughout other river systems in the upper Rio Paraná basin and present varying degrees of morphological variat...

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Bibliographic Details
Published in:Journal of fish biology 2020-01, Vol.96 (1), p.230-242
Main Authors: Zawadzki, Cláudio H., Tencatt, Luiz F. C., Britski, Heraldo A.
Format: Article
Language:English
Subjects:
Animal Fins - anatomy & histology
Animals
armoured catfish
Basins
Brazil
Catfishes - anatomy & histology
Catfishes - classification
Classification
Congeners
Fins
Heleioporus albopunctatus
Hypostominae
Hypostomus albopunctatus
Hypostomus heraldoi
Morphology
Neotropical fishes
Rio Paraná
River systems
Rivers
Spine
Taxonomic revision
Taxonomy
Variation
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Summary:Hypostomus albopunctatus was described from the Rio Piracicaba, a tributary of the Rio Tietê, upper Rio Paraná basin. Nevertheless, specimens attributed to this species are commonly found throughout other river systems in the upper Rio Paraná basin and present varying degrees of morphological variation. A taxonomic review of H. albopunctatus based on large series of specimens from many localities throughout the upper Rio Paraná basin was carried out. Results support H. lexi, H. niger and H. scaphyceps as junior synonyms. Hypostomus albopunctatus differs from all congeners except H. heraldoi by having pectoral‐fin spine equal to or shorter than pelvic‐fin spine (v. longer); it differs from H. heraldoi by having white or light yellow spots on the body and fins (v. dark brown or black spots). Despite conspicuous variation related to the shape and size of the spots and snout morphology, both spot and snout patterns overlapped among the examined populations, thus this variation was inferred to be intraspecific within a widely distributed H. albopunctatus.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.14209