Caracterização morfológica dos representantes do gênero Ituglanis (Siluriformes, Trichomycteridae) da bacia Amazônica brasileira
This project aimed to contribute for a better taxonomic understanding of the species of the genus Ituglanis, Trichomycteridae (Siluriformes) occurring in the Brazilian Amazon. The genus occurs in all the large drainages in South America. However, only two species were registered to occur in Centr...
| Autor principal: | Canto, André Luiz Colares |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11339 http://lattes.cnpq.br/9663469367773983 |
| Resumo: |
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This project aimed to contribute for a better taxonomic understanding of the species of the
genus Ituglanis, Trichomycteridae (Siluriformes) occurring in the Brazilian Amazon. The
genus occurs in all the large drainages in South America. However, only two species were
registered to occur in Central Amazon, Ituglanis amazonicus and I. parkoi, both described
based in only one specimen. In this thesis, these species are redescribed based on a larger
number of specimens of I. amazonicus, providing information on morphological variation,
and on the holotype and X-ray images for I. parkoi. As the major results, four new
morphotypes were determined for the Brazilian Amazon herein proposed as new species and
the geographic distribution of the genus was widened for several drainages in the Amazon .
Ituglanis sp. n. ‘tapajos’ presented a color pattern of difuse blotches; autopalatine with a slight
concavity on its mesial margin; pelvic-fin rays not covering anus and urogenital opening; 43-
45 vertebrae and frontal fontanel absent. Ituglanis sp. n. ‘dardanelos’ presented 4-5 pairs of
pleural ribs; 38-40 vertebrae; color pattern with dense cromatophore irradiation sometimes
forming longitudinal lines on the dorsum and frontal fontanel absent. Ituglanis sp. n. ‘xingu’
is characterized by a color pattern of big and coalescing blotches densely covering the
dorsum, blotches also on ventral surface and supraoccipital fontanel rectangular. Ituglanis sp.
n. ‘morena’ is characterized by presenting three pores on lateral line (II1, II2 and II3); many
vertebrae (51) and anus and urogenital papillae located closer to anal-fin base than to tip of
pelvic–fin rays. |