Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Loricariidae
(Armored catfishes) > Hypostominae
Etymology: Transancistrus: Derived from the Latin word 'trans', meaning across, over, or on the other side of, in reference to the distribution of this genus across rivers draining the Pacific slope of the Andes Mountains in Ecuador, and 'ancistrus', a root name for many Hypostominae genera having clusters of enlarged evertible cheek odontodes.
draining the Pacific slope of the Andes Mountains in Ecuador,
and “ancistrus,” a root name for many Hypostominae genera
having clusters of enlarged evertible cheek odontodes.; santarosensis: Named for its type locality, the Rio Santa Rosa (Ref. 89823).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
South America: Known only from the type locality, the Río Santa Rosa (Gulf of Guayaquil drainage) near the southern coast of Ecuador.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.7 cm SL male/unsexed; (Ref. 104644)
Morphology | Morphometrics
soft rays: 6. Can be diagnosed from all other members of the Chaetostoma group by having plates on the tip of the snout (except for a central region at the extreme anterior edge), but lacking plates laterally on the head (Ref. 89823).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Lujan, N.K., V. Meza-Vargas and R. Barriga-Salazar, 2015. Two new Chaetostoma group (Loricariidae: Hypostominae) sister genera from opposite sides of the Andes Mountains in Ecuador, with description of one new species. Copeia 103(3):651-663. (Ref. 104644)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01698 (0.00750 - 0.03844), b=2.92 (2.74 - 3.10), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months ().
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .