Pterocerdale Insolita

📖 Overview

Pterocerdale Insolita (Pterocerdale insolita), first described by Hoese & Motomura, 2009 is a tiny fish. Adults typically reach 4.40 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Data Deficient.

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 19; Anal spines: 1; Anal soft rays: 18; Vertebrae: 26. This species is distinguished by the following characters: lower lip with free ventral margin posteriorly only; compressed head and body; elongate body; nape, cheek, preoperculum and operculum almost completely covered with scales; body covered with cycloid scales, imbricate, in 105 vertical rows; terminal mouth slightly protractile, forming an angle of about 60° to longitudinal axis of body; maxilla reaching posteriorly to below front margin of eye; head pores are all paired laterally, 5 pores around dorsal margin of each eye; relatively short and rounded snout, with length subequal to eye diameter; anterior nostril is at the end of short tube while posterior nostril is a simple pore; no teeth on vomer, tongue and palatines; conical teeth slightly curved; 2 rows on upper jaw, small, loosely attached anteriorly while teeth in outer row slightly larger, widely spaced; lower jaw with single row of loosely attached, small teeth directed dorsally, without enlarged curved canines visible in holotype; along outer edge of dentary is a series of blunt bony dorsoventrally flattened projections with rounded tip directed more or less horizontally (widely-spaced projections appear to be bony projections of dentary, not true teeth, but probably tooth sockets), space between projections about equal to width of projections; tongue tip is broadly rounded; head papillae in transverse pattern; median nuchal crest, formed by low fold of skin from first dorsal spine onto head, low; gill opening vertical, extending ventrally from pectoral-fin base below upper margin to point just below lower pectoral base, below operculum; fleshy interorbital is subequal to diameter of eye; D1 VI, D2 I,19; A I,18; pectoral-fin rays 19; segmented caudal rays 9+8; branched caudal rays 8+7; pelvic fins are separate I,4; vertebrae 12+14 .: elongated; Cross section: compressed.

🌀 Behaviour

Behavioural data for Pterocerdale Insolita is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Freshwater; demersal. Tropical

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

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