The fishes of the genus Bathylagus of the Southern Ocean
- Authors: Gon, O (Ofer), 1949- , J.L.B. Smith Institute of Ichthyology
- Date: 1987-08
- Subjects: Bathylagidae , Fishes -- Antarctic Ocean
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70258 , vital:29639 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 43 , In his revision of the genus Bathylagus, Norman (1930) recognized five species from the Southern Ocean. The taxonomic status of these species is re-evaluated by using morphometric data and the number of vertebrae, anal fin rays, gill-rakers, lateral scale series and pyloric caeca. Principle component analysis was carried out in support of species separation, using selected body proportions. Three species, namely B. antarcticus, B. gracilis and B. tenuis, are recognized here. B. gracilis and B. euryops latifrons, both described by Lonnberg, 1905, were found to be synonymous. A key to the species of Bathylagus in the Southern Ocean is provided.
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Paragaleus leucolomatus, a new shark from South Africa, with notes on the systematics of hemigaleid sharks (Carcharhiniformes: Hemigaleidae)
- Authors: Compagno, Leonard J V , Smale, Malcolm J , J.L.B. Smith Institute of Ichthyology
- Date: 1985-04
- Subjects: Sharks -- South Africa , Carcharhiniformes , Fishes -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70184 , vital:29632 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 37 , Paragaleus leucolomatus sp.n. is described from a pregnant female shark 957 mm total length collected off Kosi Bay, Natal, South Africa. This represents the first Paragaleus and the second hemigaleid species recorded from South African waters. P. leucolomatus differs from its congeners by its broad snout, long mouth, lower anterior teeth mostly erect-cusped and without distal cusplets, 180 total vertebrae, and coloration. The species has conspicuous white-edged fins, a black apical spot on its second dorsal, and dusky blotches on the underside of its snout. P. leucolomatus may be conspecific with a Madagascar Paragaleus erroneously assigned to the West African P. pectoralis. Diagnoses of the Family Hemigaleidae and the Genus Paragaleus are presented, as well as diagnostic keys to hemigaleids of the western Indian Ocean and to Paragaleus species.
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