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Teleostei (teleosts) > Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Marcusenius: Becasue of J. Marcusen, author of "Zur Phauna des Schwarzen Meeres", 1867; ichthyologist; caudisquamatus: A combination of the Latin words cauda, for tail, and squama, for scale; this name refers to the high number of circumpeduncular scales in this species relative to the other members of the genus in South Africa (Ref. 95448).

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic. Tropical; 25°C - 26°C (Ref. 95448); 28°S - 29°S

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Africa: known only from Nseleni and Mhlatuze rivers in South Africa (Ref. 95448).

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 25.5 cm SL male/unsexed; (Ref. 95448)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 20 - 22; Anal spines: 0; Anal soft rays: 27 - 28; Vertebrae: 44. Diagnosis: Marcusenius caudisquamatus can be distinguished from its congeners by the following characters: middle body depth 23.8-25.9% of standard length; dorsal fin length 15.4-19.2% of standard length; anal fin length 23.0-24.9% of standard length; pre-dorsal length 61.7-66.7% of standard length; pre-anal length 60.7-62.8% of standard length; caudal peduncle depth 40.4-51.7% of its length; dorsal fin rays 20-22; anal fin rays 27-28; scales around caudal peduncle 19; lateral line scales 72-73; anterior gill rakers (4)+(5-6), total anterior gill rakers 9-10; posterior gill rakers (6)+(9), total posterior gill rakers 15; conical teeth on upper/lower jaws 5-5 (Ref. 95448).

Water current was moderate to fast in sections of the rivers where Marcusenius caudisquamatus was collected (Ref. 95448).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Maake, P.A., O. Gon and E.R. Swartz, 2014. Descriptions of three new species of Marcusenius Gill, 1862 (Teleostei: Mormyridae) from South Africa and Mozambique. Zootaxa 3780(3):455-480. (Ref. 95448)

IUCN Red List Status (Ref. 130435)

Endangered (EN) (B1ab(iii)+2ab(iii)); Date assessed: 06 December 2016

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00562 (0.00251 - 0.01261), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.1 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (21 of 100).

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Marcusenius caudisquamatus Maake, Gon & Swartz, 2014