On the evolution of Gomphocythere (Crustacea, Ostracoda) in Lake Nyassa/ Malawi (East Africa), with the description of 5 new species

被引：0
作者：
Koen Martens
机构：
[1] Royal Belgian Institute of Natural Sciences,
[2] University of Ghent,undefined
[3] Biology,undefined
来源：
Hydrobiologia | 2003年 / 497卷
关键词：
Crustacea; Ostracoda; taxonomy; morphology; Africa; Lake Niasa/ Nyassa/ Malawi; speciation; ancient lakes; benthos;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Five new species of the ostracod genus Gomphocythere are described from Lake Nyassa/ Malawi (East Africa). The morphology of the hemipenis in this genus is redescribed and the different parts are homologised with those of the Limnocytherinae and of other Timiraseviinae. The female abdominal structures are re-examined and a new terminology is proposed. Based on both valve and soft part morphology, the five new species are assumed to belong to a monophyletic cluster, which to all probability evolved within the lake itself. Indications for speciation by both natural and sexual selection are found. Natural selection could have been parapatric along a bathymetric cline; sexual selection involves at least characters related to the copulatory complex of the hemipenis. Closest congeners to the present species flock are the non-Tanganyikan, East African species, rather than those belonging to the southern African G. capensis complex.
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页码：121 / 144
页数：23
相关论文
共 45 条
  • [1] Colin J. P.(1978)New data on the systematics of the Limnocytheridae (Ostracoda: Cytheracea) Géobios 11 563-567
  • [2] Danielopol D. L.(1980)Sur la morphologie, la systématique, la biogéographie et l'évolution des ostracodes Timiriaseviinae (Limnocytheridae) Paléobiol. Cont. 11 1-51
  • [3] Colin J. P.(1910)Untersuchungen über die Süsswasser-Mikrofauna Deutsch-Ostafrikas Zoologica 23 1-314
  • [4] Danielopol D. L.(1993) nov.gen. (Cytherideinae, Ostracoda) du Lac Tanganyika: systématique des valves, données écologiques Géobios 26 427-447
  • [5] von Daday E.(1994)Cytherideinae (Crustacea, Ostracoda) Récents du Lac Tanganyika. Rev. Micropaléont. 37 97-112
  • [6] Ducasse O.(1957) n.gen. n.sp.: Systématique, distribution, écologie Arch. f. Hydrobiol. 53 527-536
  • [7] Carbonel P.(1939)Free living freshwater Crustacea from Lake Nyasa and adjoining waters. Part III General remarks with notes on certain Malacostraca and Ostracoda Int. Rev. ges. Hydrobiol. Hydrogeogr. 39 99-161
  • [8] Ducasse O.(1944)Ostracoden aus dem Kenia-Gebiet, vornehmlich von dessen Hochgebirgen Ostracoda. Explor. Parc. natn. Albert, Inst. Parc. Natn. Congo Belg. 12 1-62
  • [9] Carbonel P.(1990)Revision of African Limnocythere s.s. Brady, 1867 (Crustacea, Ostracoda) with special reference to the Eastern Rift Valley Lakes: morphology, taxonomy, evolution and (palaeo) ecology Arch. Hydrobiol., Ergebn. Limnol. 83 453-524
  • [10] Fryer G.(1993)On the taxonomy and zoogeography of the genus Belg. J. Zool. 123 39-54
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