Fig. 2. Dorsal view of neurocranium of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL, and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL, some elements not shown. Abbreviations: AF, anterior fontanel; AN, antorbital; AP, autopalatine; EP, epioccipital; FR, frontal; LE, lateral ethmoid; i1, infraorbital sensory branch 1; i3, infraorbital sensory branch 3; i10-11, infraorbital sensory branch 10 and 11; ME, mesethmoid; MX, maxilla; PF, posterior fontanel; PM, premaxilla; po1-2, postotic sensory branches 1 and 2; PS, posttemporosupracleithrum; PT, pterotic; s1, supraorbital sensory branch 1; s3, supraorbital sensory branch 3; s6, supraorbital sensory branch 6 (epiphyseal branch); SO, tendon-bone supraorbital; SP+PO+PN, sphenoticprootic-pterosphenoid complex bone; SU, parieto-supraoccipital; WC, Weberian capsule. Scale bar = 2 mm.

Published as part of Ferrer, Juliano & Malabarba, Luiz R., 2013, Taxonomic review of the genus Trichomycterus Valenciennes (Siluriformes: Trichomycteridae) from the laguna dos Patos system, Southern Brazil, pp. 217-246 in Neotropical Ichthyology 11 (2) on page 220, DOI: 10.1590/S1679-62252013000200001, http://zenodo.org/record/4647169