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Costa et al. 2024 (3)

Description: Distinguished from all other congeners by having the two posterior-most dorsal and ventral procurrent caudal-fin rays segmented (vs. only the posterior-most ray segmented). Cambeva atrobrunnea is also distinguished from the two other species of western RISE, Cambeva luteoreticulata Costa, Feltrin & Katz, sp. nov. and Cambeva rotundipinna Costa, Feltrin & Katz, sp. nov., by having subtruncate caudal fin (vs. rounded), fewer interopercular odontodes (20–22 vs. 29–34), and specimens below about 40 mm SL having flank light grey with small black dots that are arranged in irregular rows, coalesced on the anterior portion of the longitudinal midline to form a stripe (Fig. 7A; vs. pale yellow with large, irregularly shaped dark brown to black blotches, sometimes forming longitudinal stripes in the area between dorsum and flank in C. luteoreticulata Costa, Feltrin & Katz, sp. nov., and light brownish yellow with small black dots irregularly arranged in C. rotundipinna Costa, Feltrin & Katz, sp. nov.; from C. luteoreticulata Costa, Feltrin & Katz, sp. nov. by specimens above 40 mm SL having the nasal barbel reaching area just anterior to opercle (vs. reaching area anterior to orbit), fewer ventral procurrent caudal-fin rays (13 or 14 vs. 15 or 16), and jaw teeth irregularly arranged (vs. arranged in three rows); and from C. rotundipinna Costa, Feltrin & Katz, sp. nov. by having more procurrent caudal-fin rays (21 dorsal and 13 or 14 ventral, vs. 15–17 and 10 or 11, respectively), and more opercular odontodes (12 vs. eight or nine), (Costa et al. 2024). Etymology: The specific name atrobrunnea From the Latin ater (dull black, dark) and brunneus (brown), referring to the predominant colour of the flank in adult specimens of the new species, (Costa et al. 2024).

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Trichomycteridae

South America: Known from a single locality in a stream tributary of the Rio Timbó, Rio Iguaçu drainage, Rio Paraná basin, at about 970 m asl.

7.0cm. (2¾ins)

22-26°c (71-79°f.)

6.0-7.0.

Costa WJEM, Feltrin CRM, Mattos JLO, Katz AM (2024) Top mountain areas of subtropical southern Brazil sheltering four new small-ranged catfishes (Siluriformes, Trichomycteridae): relationships and taxonomy. Evolutionary Systematics 8(2): 199-218.
Fish in the News 2024.