Hoplisoma noxium
Hoplisoma noxium Tencatt, Ohara, Carvalho, Grant & Britto, 2025
Hoplisoma noxium
photo by Tencatt, L.F.C. et al., 2025

Family:  Callichthyidae (Callichthyid armored catfishes)
Max. size:  5.84 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  South America: Brazil.
Diagnosis:  Dorsal spines (total): 2-2; Dorsal soft rays (total): 7-8; Anal soft rays: 5-6. This species is distinguished by the following set of characters: ventral surface of trunk with small to relatively large coalescent platelets, forming a typical mosaic-like pattern; small, whitish yellow or beige blotches at least on the predorsal portion of body; flanks covered by small dark brown or black blotches, which can be roughly longitudinally aligned and variably fused with each other, forming narrow, disrupted irregular lines, but not solid stripes; typically having more numerous pale blotches on the body; large, smoothly arched dark brown or black patch present, extending from anterior portion of parieto-supraoccipital towards region of interopercle, transversally crossing the orbit and forming the typical mask-like blotch; mosaic-like pattern of plates entirely or almost entirely covering the ventral surface of trunk (Ref. 137472).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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