Paretroplus risengi, Northwestern Madagascar cichlid

Paretroplus risengi Sparks & Sparks, 2025

Northwestern Madagascar cichlid
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Paretroplus risengi
Picture by Sparks, J.S.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Etroplinae
Etymology: Paretroplus: Name from the Greek 'para' meaning 'on the side of'; in taxonomy it is commonly used in generic names to express similarity or relatedness; in the present case it would mean 'next to Etroplus' (S.Kullander, pers.comm. 3/11); risengi: Named fro Karen J. Riseng, limnologist and who collected this new species.

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

Freshwater; demersal. Tropical

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Africa: Madagascar.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 16.1 cm SL male/unsexed; (Ref. 137964)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 18 - 20; Dorsal soft rays (total): 11 - 14; Anal spines: 9 - 11. This species is within the Paretroplus damii clade” based on the following apomorphic features shared with other members, including the presence of a dark gray to black pectoral-axil patch, highly embedded chest scales that are greatly reduced in size, and flank scales with a thin, unossified posterior field. It is differs from P. damii and P. loisellei, by the pigmentation pattern in preservation, with dark head, followed by broad, light colored anterolateral band, and dark posterior body (vs. mostly uniform dark gray to dark grayish-brown in non-breeding individuals of P. damii and P. loisellei), with even large adult specimens frequently appearing quite blotchy and mottled, and fewer gill rakers on the lower limb of the first arch (mode 11 vs. 12 [P. damiii] or 13 [P. loisellei]). Paretroplus risengi and P. damii further differs from P. loisellei by having a strongly rounded and convex profile extending from the anterior margin of the lower jaw to the ventroposterior margin of the suspensorium (vs. horizontal), obliquely oriented, thin lips (vs. horizontal with fleshy lips), a lighter non-breeding overall pigmentation pattern (vs. uniformly dark brown or grayish-brown flank), and striking yellow, vivid orange, or brick red breeding coloration on head and anterior flank, over a blackish base (vs. uniform bright golden). Paretroplus risengi and P. loisellei differs from P. damii by having a weakly tricuspid symphyseal teeth in the upper jaw (vs. lacking lateral cusps). Paretroplus risengi further differs from P. loisellei by a lower lateral line scale count (mode 37 vs. 38), fewer vertebrae (mode 31 vs. 32), and a lower epibranchial raker count (9-10 vs 11-12); differs from P. damii by a considerably more blotchy and mottled pigmentation pattern (in both preservation and non-breeding individuals), and by a smaller maximum adult size (max. size ~17.0 cm SL vs. regularly exceeding well over 30.0 cm SL) (Ref. 137964).
Body shape (shape guide): short and / or deep; Cross section: compressed.

Biology     Glossary (e.g. epibenthic)

Occurs in clear, rather swift flowing rivers over sandy to muddy substrate, generally among submerged tree branches and root systems. Throughout Lac Andrapongy, type locality, which is a large, shallow, turbid floodplain lake within the Anjingo-Ankofia drainage basin (Ref. 137964).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Kullander, Sven O. | Collaborators

Sparks, J.S. and E.E. Sparks, 2025. A new species of Paretroplus (Teleostei: Cichlidae: Etroplinae) from northwestern Madagascar with a discussion of its relationships within the P. damii clade. Misc. Publ. Mus. Zool., Univ. Mich. 209(4):1-28. (Ref. 137964)

IUCN Red List Status (Ref. 130435: Version 2025-2)

Not Evaluated 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

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