Silvinichthys Bortayro

📖 Overview

Silvinichthys Bortayro (Silvinichthys bortayro) is a ray-finned fish of the family Trichomycteridae. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 2.8 cm. With a trophic level of 3.1, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Endangered on the IUCN Red List.

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 9; Anal soft rays: 8 - 10. Differs from other species of the subfamily Trichomycterinae by the extreme elongation of the opercle and narrow odontode-bearing distal plate. Further differs by having elongated and curved coronoid process of the lower jaw. The lack of pelvic fin and girdle further differs this species from all other Trichomycterinae except Eremophilus mutisii, E. candidus and Trichomycterus catamarcensis, species that are readily distinguished from Silvinichthys bortayro by their coloration pattern. The pale integumentary pigmentation and reduction of the eyes are troglomorphic characters that are paralleled only in cave-dwelling species Trichomycterus itacarambiensis and T. chaberti among presently known trichomycterines. Can be easily distinguished from those two species by its proportionally much shorter body and fewer pectoral-fin rays (6 vs 7 and 10, respectively). Further differs except Silvinichthys mendozensis by the absece of a latero-sensory canal branch in the frontal and sphenotic; and also differs from S. mendozensis in having 6 versus 7 or 8 pectoral-fin rays and the absence versus presence of the pelvic fin and girdle .: elongated.

🌀 Behaviour

Behavioural data for Silvinichthys Bortayro is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Freshwater; demersal. Tropical South America: artificial wells in western Argentina.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

🔍 Similar Species

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

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