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Hemiodus langeanii  Beltrão & Zuanon, 2012

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Hemiodus langeanii
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Hemiodontidae (Halftooths)
Etymology: Hemiodus: Greek, hemi = half + Greek, odous = teeth (Ref. 45335);  langeanii: Named for Dr. Francisco Langeani, for his highly relevant contributions to the knowledge of hemiodontid fishes.

Environment / Climate / Range Ecology

Freshwater; benthopelagic; pH range: 6.4 - 6.8.   Tropical; 26°C - 28°C (Ref. 91067), preferred ?

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: known of the type locality in the rio Amana, rio Maués-Açu drainage, near the boundary of the States of Pará and Amazonas, Brazil

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 13.6 cm SL male/unsexed; (Ref. 91067)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 11-12; Anal soft rays: 11 - 13; Vertebrae: 36. Distinguished from other species of Hemiodus by its high body (27.1-35.3%, average 32.3% SL vs. 18.8-28.5% in remaining species). Other diagnostic characters include the following: presence of a large lateral dark spot that is equal to, or greater than, the eye diameter (vs. smaller in remaining species except for Hemiodus microlepis); absence of conspicuous lateral stripe or transverse bands; 68-74 scales on lateral line (vs. 94-123 in Hemiodus argenteus, 124-148 in Hemiodus microlepis, 86-99 in Hemiodus orthonops and 77-92 in Hemiodus parnaguae). Differs from Hemiodus unimaculatus (which overlaps in the number of lateral line scales) by having 9-10 scales between the lateral line and the pelvic fin origin (vs. 4-7), which are similar sized above and below lateral line (vs. scales larger bellow the lateral line in Hemiodus unimaculatus) (Ref. 91067).

Biology     Glossary (e.g. epibenthic)

Found in slow-flowing stretches of the rio Amana and igarapé Porquinho (1.0-2.5 m deep) and in artificial ponds (4.0-5.0 m deep and 40-70 m in diameter) resulting from gold-mining activities. The Rio Amana and its tributaries are characterized by clear water (not stained by humic acids) but turbid due to excess of fine suspended solids (clay) as a result of mining activities along river margins and/or bottom such as dredging (Ref. 91067).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Langeani, Francisco | Collaborators

Beltrão, H. and J. Zuanon, 2012. Hemiodus langeanii (Characiformes: Hemiodontidae), a new species from rio Amana, rio Maués-Açú drainage, Amazon basin, Brazil. Neotrop. Ichthyol. 10(2):255-262. (Ref. 91067)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00794 (0.00339 - 0.01864), b=3.12 (2.91 - 3.33), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.7   ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  .
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .