SCOTCAT.COM  

Costa et al. 2024 (3)

Description: Distinguished from all congeners by a unique colour pattern in adult specimens consisting of flank and dorsum with longitudinal rows of interconnected yellowish white vermiculate diffuse marks (vs. never a similar colour pattern), and the presence of a distinctive projection on the anterior portion of the medial margin of the sesamoid supraorbital, connected by thin ligamentous tissue to a dorsal projection on the articulatory shell of the autopalatine for the lateral ethmoid (vs. never a similar process connected to that articulation). Cambeva galactica is also distinguished from all other species of the Cambeva beta-clade, except Cambeva flavopicta Costa, Feltrin & Katz, 2020, Cambeva naipi (Wosiacki & Garavello, 2004), Cambeva taroba (Wosiacki & Garavello, 2004), and Cambeva tourensis Costa, Feltrin & Katz, 2023 by having six pectoral-fin rays (vs. five, seven, or eight). Cambeva galactica is distinguished from C. flavopicta and C. tourense by having well-developed pelvic fins (vs. absent); from C. naipi and C. taroba by having more interopercular odontodes 29–32 vs. 11 or 12 in C. naipi and 17–21 in C. taroba) and more jaw teeth (41–43 on the premaxilla and 39–46 on the dentary, vs. 25–34 and 23–32, respectively); from C. naipi by having 14 or 15 ribs (vs. 12 or 13), fewer opercular odontodes (eight or nine vs 12 or 13), and from C. taroba by having a minute pectoral-fin filament, its length less than 5% of the pectoral-fin length (vs. about 20%), fewer procurrent caudal-fin rays (18 or 19 dorsal and 12 or 13 ventral, vs. 26 or 27 and 21–23, respectively), more vertebrae (39 or 40 vs 36). Molecular diagnosis: 34 nucleotide substitutions, nine of them unique among taxa analysed, and five unique for the Cambeva beta-clade Costa et al. (2024). Etymology: The specific name galactica derived from the Ancient Greek word galaktikós meaning milky, an allusion to the rows of yellowish white diffuse vermiculate marks present in the flank of the new species, reminiscent of the Milky Way, Costa et al. (2024).

None

None

Trichomycteridae

South America: Only known from its type locality in the upper Rio Preto drainage, which is a tributary of the Rio Negro, 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.