Journal Article
Ituglanis mambai, a new subterranean catfish from a karst area of Central Brazil, rio Tocantins basin (Siluriformes: Trichomycteridae)
Bichuette, M.E. and Trajano, E.
Record Number:
2601
Year:
2008
Journal:
Neotropical Ichthyology
Pages:
9-15
Volume:
6
Abstract:
Ituglanis mambai, new species, is described from a cave in the Mambai karst area, State of Goids, Central Brazil. The new species distinguishes from epigean and cave congeners by the combination of the following characteristics: posterior supraoccipital fontanel absent; pectoral-fin rays usually i,7; six pleural ribs; total vertebrae 37-38 behind Weberian apparatus; shorter predorsal length (65.1-70.8% SL); shorter caudal peduncle length (8.4-11.9% SL); shorter dorsal-fin base length (7.7-11.3% SL); wider interobital width (29.2-36.5% HL); larger mouth width (43.4-64.0% HL); intermediate between epigean and other cave Ituglanis species as regards to both eyes (diameter varying from 0.5 to 1.0 mm in adults, 7.8-10.1% HL) and pigmentation, composed by irregular light brown spots along the body. The latter indicate the troglobitic status for I. mambai. In addition, this species has the maxillae with a discrete medial-posterior projection; fronto-lacrimal one half-length of the maxillae and pointed backwards; posterior process of palatine half its length, with a tenuous medial concavity; 14 dorsal and 12 ventral procurrent rays. In the natural habitat, T mambai displayed cryptobiotic habits, trying to hide in the graveled bottom or under boulders when disturbed, apparently showing a negative response to light. It was observed a preference to slow-moving waters. Recent flood marks were observed in the stream conduit in March/April 2007 (end of the rainy season) when less individuals were observed on 300 in of the subterranean stream compared to September 2004 (end of the dry season).
Times Cited:
6
Relevent Species:
Related Records:
Bichuette, M.E., Garz, M.A. and Moller, D. (2001)
Preliminary studies on cave-dwelling catfishes, Ituglanis sp., from Goias, Brazil
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