Nannocharax Hadros

📖 Overview

Nannocharax Hadros (Nannocharax hadros), first described by Katemo Manda, Snoeks, Chocha Manda & Vreven, 2021 is a small fish in the family Distichodontidae (order Characiformes). Adults typically reach 7.80 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. Recorded depth range: 1 to 1 metres. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus.

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 13 - 14; Anal spines: 0; Anal soft rays: 8 - 9; Vertebrae: 32 - 33. Diagnosis: Nannocharax hadros is distinguished from all its congeners by the possession of a completely pored lateral line vs. incompletely in N. angolensis, N. dageti, N. hastatus, N. lineostriatus, N. machadoi, N. minutus, N. monardi, N. multifasciatus, N. ocellicauda, N. rubensteini, N. uniocellatus and N. wittei; 37-43 lateral line scales vs. fewer scales in N. ogoensis (36) and N. pteron (35), and more scales in N. elongatus (52-57), N. intermedius (46-55), N. lineomaculatus (47-53), N. luapulae (49-55), N. macropterus (45-47), N. maculicauda (55-61), N. niloticus (50-55), N. occidentalis (50-56), N. reidi (46-48), N. rubrolabiatus (45-50), and N. signifer (46-48); 14-16 circumpeduncular scales, vs. 12 in N. altus and N. schoutedeni; 11-12 scales between the dorsal and adipose fins, vs. 9-10 in N. brevis, and 8-9 in N. seyboldi . In N. hadros, the dorsal-fin origin is situated well behind the pelvic-fin origin, vs. origin situated anterior to pelvic-fin origin in N. ansorgii, N. fasciolaris, N. gracilis, N. hollyi, N. latifasciatus, N. micros, and N. taenia or at the same level as the pelvic-fin origin in N. fasciatus; Nannocharax hadros has the tip of the longest pectoral-fin ray extending beyond the vertical through the insertion of the pelvic fin, vs. not reaching the pelvic-fin insertion in N. parvus, and a large distance between the posterior margin of the anus and the insertion of first anal-fin ray, 5.5-8.4% of standard length vs. 0.9-1.9% in N. usongo and 2.2-3.8% in N. zebra; it is most similar to N. procatopus and can be distinguished from it by a higher number of pectoral-fin rays, 16-17 vs. 12-15, respectively, a deeper body at the anal-fin origin, 15.5-19.3% of standard length vs. 10.9-15.0%, respectively, and a smaller internostril distance, 11-16% of head length vs. 17-23%, respectively .: elongated.

🌀 Behaviour

Behavioural data for Nannocharax Hadros is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Freshwater; pelagic; pH range: 7.0 - 8.4; depth range 1 - 1 m . Tropical; 18°C - 28°C

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

📊 Population Risk & Fisheries

🐠 Related Species

🔍 Similar Species

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