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- Redescription of Hydrolagus africanus (Gilchrist, 1922) (Chimaeriformes: Chimaeridae), with a review of southern African chimaeroids and a key to their identification
- Hydrolagus africanus (Gilchrist, 1922) is a little‑known chimaeroid species, originally described from the KwaZulu‑ Natal coast of South Africa, with a range spanning the western Indian Ocean from Kenya, south to Mozambique and South Africa, and extending into the south‑eastern Atlantic to Namibia. This species is characterised by a lateral patch of denticles on the male prepelvic tenacula, a second dorsal fin slightly indented in the centre, a long, curved dorsal spine equal to or sometimes exceeding the height of the first dorsal fin, and a uniform light brown body with no distinctive markings or patterns and slightly darker brown fins. To clarify the taxonomic status of H. africanus, we examined and compared specimens from throughout its range in southern Africa. Because the syntypes of H. africanus are lost, we designate a neotype and redescribe the species based on the neotype and additional southern African specimens. In addition, we present a review of southern African chimaeroids and provide an updated key to their identification. © 2015 NISC (Pty) Ltd., Cited By :1, Export Date: 4 September 2015
- Walovich, Ebert, Long, Didier
- Hydrolagus erithacus sp. nov.(Chimaeriformes: Chimaeridae), a new species of chimaerid from the southeastern Atlantic and southwestern Indian oceans
- A new species of chimaerid, Hydrolagus erithacus sp. nov., is described from nine specimens collected from the southeast Atlantic and southwest Indian oceans from depths of 470–1,000 meters. This species is distinguished from all other Hydrolagus species based on the following characteristics: head bulky, relatively large, followed by stocky body; head and body height from about pectoral fin origin to pelvic fin origin similar, then tapering rapidly to filamentous tail; first dorsal fin spine height about equal to, or slightly less than first dorsal fin apex height; second dorsal fin up to 81% of total body length and uniform in height; trifurcate claspers forked for approximately 20% of total length; robust frontal tenaculum nearly uniform in width, prepelvic tenaculae with five to seven medial spines, and a uniform black coloration with robust, non-deciduous skin. Comparison of mitochondrial NADH2 gene sequences with other morphologically similar Hydrolagus species suggests that H. erithacus is a distinct species.
- Walovich, Ebert, Kemper