The fish fauna of the upper Piraí drainage, a transposed mountain river system in southeastern, Brazil Author de Brito, Victor Author Buckup, Paulo Andreas text Check List 2019 2019-02-22 15 1 235 247 http://dx.doi.org/10.15560/15.1.235 journal article 10.15560/15.1.235 1809-127X Trichomycterus mariamole Barbosa & Costa, 2010 Figure 3C Geographic distribution: Piraí river drainage and upper reaches of Alambari and Barreiro rivers, Paraíba do Sul river basin. Diagnosis: Trichomycterus mariamole has light yellow background coloration with small circular brown marks on flanks, diameter of the eyes 9% to 11% of HL, opercular region of odontoids reduced and laterally positioned, and 7 pectoral fin rays ( Barbosa and Costa 2010 ). Trichomycterus mariamole differs from T. claudiae , a species that occurs in the middle portion of the Piraí drainage, by the short ill-defined stripe restricted to the anterior portion of the flank (vs. well defined stripe along the whole flank) and fewer interopercular odontodes (27– 34 vs. 41–46).