New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

💧 Freshwater 🌡️ Tropical

Yaluwak Primus

Yaluwak primus Lujan, Armbruster & Werneke, 2019
Max Length
12.3 cm
Max Weight
-
Lifespan
-
Trophic Level
-
Depth
-
Climate
Tropical
Resilience
Medium
Vulnerability
31.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Yaluwak Primus (Yaluwak primus), first described by Lujan, Armbruster & Werneke, 2019 is a small fish. Adults typically reach 12.30 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters.

Scientific Name
Yaluwak primus
Authority
Lujan, Armbruster & Werneke, 2019
Habitat
Freshwater
Climate
Tropical
Max Length
12.3 cm
Resilience
Medium
Vulnerability
31.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Yaluwak
Yaluwak
Species
Yaluwak Primus
Yaluwak primus

🐟 Physical Description

This species is distinguished from the Hypostominae genera Corymbophanes, Hypostomus and Pterygoplichthys and from all non-Hypostominae loricariids by having a cluster of > 25 evertible cheek odontodes (vs. no cheek odontodes or < 10); differs from all other members of the Hypostominae except some Ancistrus species Araichthys loro Zawadzki et al., 2016, Chaetostoma carrioni (Norman, 1935) and Leptoancistrus by the absence of an adipose fin, having instead a low ridge of azygous plates; differs from all Ancistrus species and Chaetostoma carrioni by having a fully plated snout, from Araichthys loro by having a taller caudal peduncle. 10.9, 14.2% SL (vs. ?8%) and longer tooth rows 23.7, 24.7% HL (vs. 19%) and from Leptoancistrus by lacking cheek odontodes that extend past the cleithrum and having dorsal fin ii,7 (vs. ii,8); differs from Corymbophanes by its larger maximum body size, 12.29 cm SL (vs. 10.06 cm SL) .Cross section: oval.

🌀 Behaviour

Behavioural data for Yaluwak Primus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: Guyana.

🌿 Ecology

Zone Preferences
💧 Freshwater

📐 Morphometrics

Length–Weight Relationship: W = 0.01549 × L2.96 (TL)
Max TL
12.3cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
31.00/100
Low vulnerability
Climate Zone
Tropical
Described By
Lujan, Armbruster & Werneke, 2019

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Yaluwak Primus ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.