. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. THE SYSTEMATICS OF THE FISHES OF THE FAMILY GLINIDAE 105 Origin of the South African Glinidae The presence of a hooklike projection on the anterior border of the clei- thrum, small scales with radii on all margins, and the very similar general appearance of the less specialized members of both groups, point to a common origin of the Myxodini and the Clinini. Hubbs (1952) considered the Myxodini to be ancestral to the Clinini because the Myxodini are oviparous, fertilization is external, and there is
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. THE SYSTEMATICS OF THE FISHES OF THE FAMILY GLINIDAE 105 Origin of the South African Glinidae The presence of a hooklike projection on the anterior border of the clei- thrum, small scales with radii on all margins, and the very similar general appearance of the less specialized members of both groups, point to a common origin of the Myxodini and the Clinini. Hubbs (1952) considered the Myxodini to be ancestral to the Clinini because the Myxodini are oviparous, fertilization is external, and there is no intromittent organ in the male. The derivation of the South African species from the most generalized of the American myxodids, the species of the genus Gibbonsia, would not be difficult. If one of the American species such as Gibbonsia metzi C. L. Hubbs were to develop viviparity, the result would be a clinid very similar to some of the more generalized South African clinids such as Clinus robustus. I examined specimens of Gibbonsia, Myxodes, and Heterostichus, and, apart from the lack of an intromittent organ in the male, they are strikingly similar to the South African clinids. 200l 175 150- 125 100 75- 50- 25- Oa Clinoporus Blennioclinus Pavoclinus. Gynutoclinus Fig. 45. Hypothetical intergcneric relationships of South African Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
