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Ituglanis mambai Bichuette & Trajano, 2008 |
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Relevant Information: |
Description: Dorsal soft rays (total): 9; Anal soft rays: 6; Vertebrae: 37 - 38. Can be differentiated from both epigean and cave congeners by the combination of the following features: absence of posterior fontanel (except for Ituglanis epikarsticus and Ituglanis macunaima; usually i7 pectoral-fin rays (except for Ituglanis bambui, Ituglanis passensis and Ituglanis epikarsticus; 6 pleural ribs (except for Ituglanis bambui, Ituglanis parahybae and Ituglanis ramiroi; total vertebrae 37-38 behind Weberian apparatus (except for Ituglanis bambui, Ituglanis laticeps, and Ituglanis macunaima; predorsal length 65.1-70.8% in SL (except for Ituglanis bambui); caudal peduncle length 8.4-11.9% in SL; dorsal-fin base length 7.7-11.3% in SL; interobital width 29.2-36.5% in HL (except for the cave species); mouth width 43.4-64.0% in HL (except for Ituglanis bambui; pigmentation intermediary between epigean and cave Ituglanis species, composed by irregular light brown spots along the body; variable size of eyes and intermediate between those of epigean and formerly described cave-restricted congeners, with diameter in adults ranging from 0.5-1.0 mm (7.8-10.0% in HL) (except for Ituglanis cahyensis. Other diagnostic characters include presence of discrete medial-posterior projection on the maxillae; 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. Body shape (shape guide): elongated (Bichuette & Trajano, 2008). Habitat: Found in subterranean stream inside the cave with slow to fast-moving-waters, 10-90 cm deep on average, and bottom composed basically of sand, silt, some gravels and boulders. Occurs solitarily with swimming activity on the bottom and sometimes in the midwater. Exhibits cryptobiotic habits, hiding intro the gravels and under boulders when disturbed, and showing a negative response to carbide and flashlight. Prefers slow-moving pools (Bichuette & Trajano, 2008). Etymology: The specific name mambai: The specific name makes reference to the karst region , Mambaí, where the species occurs. |
Common Name: |
None |
Synonyms: |
None |
Family: |
Trichomycteridae |
Distribution: |
South America: Subterranean stream inside Lapa do Sumidouro Cave, Upper Tocantins basin, Goiás, Brazil. |
Size: |
7.0cm. (2¾ins) |
Temp: |
23-26°c (73-78°f.) |
p.H. |
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7.0-7.5. |
IUCN Red List |
Ituglanis mambai is endemic to Brazil, known from a single location: an underground stream in the Lapa do Sumidouro cave, in the upper Tocantins River basin, in the state of Goiás. The area of occupancy was estimated at 4 km2 . Available studies on population density estimated a very small population, with fewer than 250 mature individuals. Threats arise from the advancement of agriculture, the use of pesticides, and the resulting siltation; all of these impacts characterise a continued decline in habitat quality. Considering siltation as the main threat, a location is delimited. Therefore, Ituglanis mambai was categorized as Critically Endangered (CR) by criterion B2ab(iii), (IUCN 2024). |
Reference: |
Bichuette, M.E. and
E. Trajano, 2008. Ituglanis mambai,
a new subterranean catfish from a karst area of Central
Brazil, rio Tocantins basin (Siluriformes: Trichomysteridae).
Neotrop. Ichthyol. 6(1):9-15. |
Family: Trichomycteridae Back to Ident-A-Cat Click on Thumbnails |
Ituglanis mambai Holotype-Lapa do Sumidouro Cave, Posse, Goiás, Brazil |
 Ituglanis
mambai Dorsal view-holotype-Lapa do Sumidouro Cave, Posse, Goiás, Brazil |
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