The taxonomic status and phylogenetic relationship of Pseudocrenilabrus Fowler (Teleostei, Cichilidae)
- Authors: Greenwood, Peter Humphrey
- Date: 1989
- Language: English
- Type: Text
- Identifier: vital:15004 , http://hdl.handle.net/10962/d1019722 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 54
- Description: Various and disparate opinions have been expressed with regard to the phylogenetic affinities of Pseudocrenilabrus, a seemingly generalized and primitive haplochromine genus. These views are reconsidered and rejected. Instead, it is suggested that Pseudocrenilabrus is a derived and paedomorphic taxon evolved from a generalized haplochromine ancestor such as would be represented amongst extant African cichlids by a species of the genus Astatotilapia; for the moment it is not possible to identify a sister group more precisely. The suggestion that Pseudocrenilabrus is a paedomorphic taxon is based on certain Osteological and dental features, particularly the reductional trend manifest in the infraorbital bones of its three constituent species. A new diagnosis and synonomy are provided for the genus, together with notes on its anatomy, osteology and meristic features. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1989
- Authors: Greenwood, Peter Humphrey
- Date: 1989
- Language: English
- Type: Text
- Identifier: vital:15004 , http://hdl.handle.net/10962/d1019722 , ISSN 0073-4381 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 54
- Description: Various and disparate opinions have been expressed with regard to the phylogenetic affinities of Pseudocrenilabrus, a seemingly generalized and primitive haplochromine genus. These views are reconsidered and rejected. Instead, it is suggested that Pseudocrenilabrus is a derived and paedomorphic taxon evolved from a generalized haplochromine ancestor such as would be represented amongst extant African cichlids by a species of the genus Astatotilapia; for the moment it is not possible to identify a sister group more precisely. The suggestion that Pseudocrenilabrus is a paedomorphic taxon is based on certain Osteological and dental features, particularly the reductional trend manifest in the infraorbital bones of its three constituent species. A new diagnosis and synonomy are provided for the genus, together with notes on its anatomy, osteology and meristic features. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1989
New species and new records of rare Antarctic Paraliparis fishes (Scorpaeniformes: Liparididae)
- Stein, David, L, Tompkins, Linda, S
- Authors: Stein, David, L , Tompkins, Linda, S
- Date: 1989
- Subjects: Cyclopteridae -- Antarctica , Paraliparis -- Antarctica
- Language: English
- Type: Text
- Identifier: vital:14997 , http://hdl.handle.net/10962/d1019703 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 53
- Description: The liparidid fishes collected in the Southern Ocean by the U.S. Navy vessel “Eltanin” were reviewed in an unpublished M.Sc. thesis by the junior author (Tompkins, 1977). These collections include several hundred specimens, of which 134, representing at least 10 species of the genus Paraliparis, have been re-examined by the senior author and are the subject of the present paper. Descriptions are given for five new species of Antarctic Paraliparis: P. anarthractae, P. andriashevi, P. eltanini, P. incognita, and P. fuscolingua. Four of the new species are illustrated; the fifth (P. incognita) was illustrated by Andriashev (1986: Fig. 59) as P. terraenovae Regan, 1916. P. edentatus Andriashev, 1986 is synonymized with P. terraenovae, and additional data on this species are presented. A probable new species of Paraliparis is diagnosed but not named due to the poor condition of the single specimen. New records of five other rare species (P. antarcticus Regan P. devriesi Andriashev, P. meganchus Andriashev, P. stehmanni Andriashev, and P. tetrapteryx Andriashev) are discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1989
- Authors: Stein, David, L , Tompkins, Linda, S
- Date: 1989
- Subjects: Cyclopteridae -- Antarctica , Paraliparis -- Antarctica
- Language: English
- Type: Text
- Identifier: vital:14997 , http://hdl.handle.net/10962/d1019703 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 53
- Description: The liparidid fishes collected in the Southern Ocean by the U.S. Navy vessel “Eltanin” were reviewed in an unpublished M.Sc. thesis by the junior author (Tompkins, 1977). These collections include several hundred specimens, of which 134, representing at least 10 species of the genus Paraliparis, have been re-examined by the senior author and are the subject of the present paper. Descriptions are given for five new species of Antarctic Paraliparis: P. anarthractae, P. andriashevi, P. eltanini, P. incognita, and P. fuscolingua. Four of the new species are illustrated; the fifth (P. incognita) was illustrated by Andriashev (1986: Fig. 59) as P. terraenovae Regan, 1916. P. edentatus Andriashev, 1986 is synonymized with P. terraenovae, and additional data on this species are presented. A probable new species of Paraliparis is diagnosed but not named due to the poor condition of the single specimen. New records of five other rare species (P. antarcticus Regan P. devriesi Andriashev, P. meganchus Andriashev, P. stehmanni Andriashev, and P. tetrapteryx Andriashev) are discussed. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1989
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