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Russel Brian Tate (3)

Description: Dorsal spines (total): 0; Dorsal soft rays (total): 8; Anal spines: 0; Anal soft rays: 9 - 12. Doumea chappuisi is distinguished from its congeners, except D. reidi and D. stilicauda, by having the dorsolateral and ventrolateral vertebral processes extending through the skin to form longitudinal bony ridges from the region of the base of adipose fin posteriorly to the caudal-fin base and from slightly posterior of the pelvic-fin origin to the caudal-fin base; exposed processes are in the shape of longitudinal bars with slightly corrugated surfaces that form irregular longitudinal ridges. It differs from D. reidi by a shorter caudal-peduncle length, 22-29% of standard length vs. 31%; the posterior extent of the adpressed pelvic fin in specimens over 90 mm standard length falling short of the anterior limit of the anal fin, vs. extending distinctly beyond that point; the anterior extent of the exposed vertebral processes along the ventral surface of the body extending to slightly posterior of pelvic-fin origin, vs. extending to the area lateral to the anal-fin base; and the uniform pigmentation pattern of the dorsal surface of the unbranched rays of the pectoral and pelvic fins, vs. with series of irregular dark spots against a lighter background. It differs from D. stilicauda in the longer predorsal length, 32-37% of standard length vs. 27-30%; longer head length, 18% of standard length vs. 15-17%; smaller caudal-peduncle length, 22-29% of standard length vs. 35-41%; and caudal-peduncle depth 7.3-14.5 times in caudal-peduncle length, vs. 19.6-25.8 times. Habitat: The nine species in this genera prefer the upper courses of the rivers as they are rheophilic (an organism that prefers to live in fast moving water). Etymology: Named in honour of French-born Swiss zoologist and biospeleologist Pierre-Alfred Chappuis (1891-1960), who collected the type specimen. Remarks: Doumea chappuisi occurs in several coastal basins in Guinea-Bissau, Guinea, Liberia and Côte d'Ivoire. No major, widespread threats have been identified. This catfish is therefore listed as Least Concern (IUCN 2020).

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Amphiliidae

Africa: Guinea, Liberia and Côte d’Ivoire; Cavally, Nuon, St. Paul, and Koumba River systems. Type locality: Danané (Côte d’Ivoire).

12.0.cm (4¾ins)

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Diallo, I. 2020. Doumea chappuisi. The IUCN Red List of Threatened Species 2020.
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Ferraris, C.J., P. Skelton and R.P. Vari, 2010. Species of the Doumea chappuisi complex (Siluriformes, Amphiliidae) with the descriptions of new species from the upper Sanaga River and Nyong River basins. Copeia 2010(4):705-715.
Froese, R. and D. Pauly. Editors. 2023. FishBase. World Wide Web electronic publication. www.fishbase.org, version.