Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Characiformes
(Characins) > Characidae
(Characins) > Stevardiinae
Etymology: Monotocheirodon: Greek, monos = one + Greek, cheir = hand + Greek, odous = teeth (Ref. 45335); drilos: The specific name drilos is Greek masculine meaning penis. It is used in reference to the
prominent male inseminating organ. A noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
South America: Ríos Tambopata and Madre de Dios, Río Madre de Dios basin in Peru.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.3 cm SL male/unsexed; (Ref. 94699); 3.8 cm SL (female)
Morphology | Morphometrics
soft rays: 11 - 14;
Vertebrae: 37 - 38. This species can be distinguished from its congeners by having the following characters: urogenital papilla externally visible in both males and females (vs. absent in M. pearsoni); length of urogenital papilla of sexually active males is shorter, half length of anal-fin base (vs. about equal to length of anal fin-base in M. kontos); dorsal fin height 16.1-17.8% SL in females and juveniles (vs. 13.4-15.8% SL in M. kontos); and 5 premaxillary tooth cusps (vs. 7 in M. kontos) (Ref. 94699).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Menezes, N.A., S.H. Weitzman and I. Quagio-Grassiotto, 2013. Two new species and a review of the inseminating freshwater fish genus Monotocheirodon (Characiformes: Characidae) from Peru and Bolivia. Papéis Avulsos de Zoologia (Museu de Zoologia da Universidade de São Paulo) 53(10):129-144. (Ref. 94699)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01905 (0.00729 - 0.04983), b=2.98 (2.75 - 3.21), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.0 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .