Usumacinta sea catfish (Potamarius usumacintae)

Scientific name: Potamarius usumacintae Betancur-R. & Willink, 2007

The Usumacinta sea catfish (Potamarius usumacintae) is a freshwater fish of the family Ariidae. Native range: Central America, endemic to the R?o Usumacinta basin in Guatemala and Mexico.

Biology

Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal soft rays: 19 - 23. Distinguished from other freshwater ariids occurring in Mesoamerica by the following combination of characters: presence of accessory tooth patches on palate; premaxillary tooth band length 2.4-2.9 in its width;; snout length 1.4-1.8 in postorbital length; lateral gill rakers on first gill arch 17-20 (mode 19); mesial gill rakers on first two gill arches well developed; accessory palatal patches with numerous pointed-conical teeth; premaxillary maxillary barbel not extending behind gill membrane; and dorsomedian fleshy groove on head absent.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Potamarius usumacintae
Family
Ariidae (Sea catfishes)
Order
Siluriformes (Catfish)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
59.5
Environment
Freshwater; demersal
Climate
Tropical
Distribution
Central America: endemic to the R?o Usumacinta basin in Guatemala and Mexico.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Traumatogenic
Resilience
Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.)

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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