Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopteri (ray-finned fishes) > Siluriformes
(Catfish) > Loricariidae
(Armored catfishes) > Hypoptopomatinae
Etymology: Hisonotus: Greek, isos = equal + Greek, noton = back (Ref. 45335); bockmanni: Named for Flávio A. Bockmann, in appreciation for his guidance and his contributions to the knowledge of Neotropical catfishes.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
South America: Rio Cururu, Amazon basin, Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 2.1 cm SL male/unsexed; (Ref. 91046); 2.4 cm SL (female)
Morphology | Morphometrics
Vertebrae: 20. The following unique combination of characters are useful to diagnose this species from all congeners: snout dark brown with unpigmented, well-defined, rostrocaudally elongate ellipse anterior to each naris; predorsal region darkly pigmented with five unpigmented spots arranged as anteriorly pointed chevron with three anteriormost spots anterior of dorsal fin and two posteriormost spots lateral to and coequal with insertion of dorsal-fin spine; a wide, obliquely transverse, darkly pigmented bar (saddle-like) extending from insertions of pectoral and pelvic fins through anterior half of dorsal-fin base, rays, and membrane; caudal fin with anterior half of membrane and rays lacking pigment; an irregularly slender or broad transversal bar extending around caudal peduncle just posterior of anal fin; and a slender mid-lateral stripe extending from oblique transversal bar through caudalpeduncle bar to caudal-fin base. Combination of the two latter color features forms a unique rostrocaudally elongate cross along most of the caudal peduncle. This species further differs from all congeners except Hisonotus chromodontus, H. luteofrenatus, and H. insperatus by having a functional V-shaped spinelet (Ref. 91046).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Carvalho, M. and A. Datovo, 2012. A new species of cascudinho of the genus Hisonotus (Siluriformes: Loricariidae: Hypoptopomatinae) from the Upper Rio Tapajós Basin, Brazil. Copeia 2012(2):266-275. (Ref. 91046)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.7 ±0.1 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .