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Megalonema orixanthum  Lundberg & Dahdul, 2008

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

Actinopterygii (ray-finned fishes) > Siluriformes (Catfish) > Pimelodidae (Long-whiskered catfishes)
Etymology: Megalonema: Greek, megas, megalos = great + Greek, nema = filament (Ref. 45335);  orixanthum: The specific name is in reference to the distribution of the species in the Orinoco basin and its relationship to the species Megalonema xanthum.

Environment / Climate / Range Ecology

Freshwater; demersal.   Tropical, preferred ?

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

South America: Orinoco River basin in Colombia and Venezuela.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 11.6 cm SL male/unsexed; (Ref. 79495)

Short description Morphology | Morphometrics

Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal soft rays: 12 - 15; Vertebrae: 43 - 45. Vertebrae including the Weberian complex (Ref. 79495).

Biology     Glossary (e.g. epibenthic)

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

Main reference Upload your references | References | Coordinator | Collaborators

Lundberg, J.G. and W.M. Dahdul, 2008. Two new cis-Andean species of the South American catfish genus Megalonema allied to trans-Andean Megalonema xantum, with description of a new subgenus (Siluriformes: Pimelodidae). Neotrop. Ichthyol. 6(3):439-454. (Ref. 79495)

IUCN Red List Status (Ref. 109396)

  Not Evaluated 

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

More information

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Common names
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Ciguatera
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Summary page | Point data | Common names | Photos

Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | 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 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00490 (0.00242 - 0.00990), b=3.13 (2.95 - 3.31), based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.7   ±0.7 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (13 of 100) .