Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Characiformes
(Characins) > Characidae
(Characins) > Cheirodontinae
Etymology: Serrapinnus: Latin, serran, serranus, saw and a fish of genus Serranus + Latin, pinna = spiny, thorn (Ref. 45335); potiguar: The name refers to 'potiguar', a term traditionally used in Brazil to refer to someone born in the Rio Grande do Norte State. An adjective.
Environment / Climate / Range
Freshwater; benthopelagic. Tropical, preferred ?
South America: Rio Ceará-Mirim basin, Rio Grande do Norte State, Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.2 cm SL male/unsexed; (Ref. 96867)
Morphology | Morphometrics
(total): 11. Serrapinnus potiguar can be diagnosed from all congeners by the shape and arrangement of the ventral procurrent caudal-fin rays of mature males, where the hypertrophied elements are scimitar-shaped and arranged in a semi-circle through the ventral profile of the caudal peduncle (vs. hypertrophied elements rod-shaped or pointed distally, arranged parallel to each other). It differs further by having 5 cusps in the premaxillary and dentary teeth (vs. 7 to 9 in S. calliurus, S. micropterus, and S. piaba, 9 to 11 in S. sterbai, and 10 to 12 in S. gracilis and S. littoris), terminal mouth (vs. slightly superior mouth in S. microdon), an incomplete lateral line (vs. complete lateral line in S. heterodon), dorsal fin mostly hyaline (vs. dorsal fin with an anterior and proximal dark blotch in S. notomelas), and by lacking black spot in the posteroventral region of the abdomen (vs. present in S. kriegi) (Ref. 96867).
The type locality, the rio Ceará-Mirim, is characterized by clear and transparent water, sandy
bottom high depth 1.2 m, slow to moderate water current and dense floating and submerse vegetation. Sympatric and synotopic with Compsura heterura, Serrapinnus heterodon and S. piaba in the type locality. Feeds mainly on vegetal matter and algae, but also takes insects and microcrustaceans (Ref. 96867).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Jerep, F.C. and L.R. Malabarba, 2014. A new species of Serrapinnus Malabarba, 1998 (Characidae: Cheirodontinae) from Rio Grande do Norte State, northeastern Brazil. Neotrop. Ichthyol. 12(2):301-308. (Ref. 96867)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01380 (0.00545 - 0.03498), b=3.06 (2.84 - 3.28), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.6 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .