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Trends (Enp. P4 Innerhalb Der Parastenocarididen (Copepoda Harpacticoidea)

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[To the author's knowledge, this is the first time that an orbital model is presented to coordinate the structural trends of the endopod of the fourth leg (♂) in the parastenocarids. The model is based on more than 100 described species. This method allows to distinguish three natural principles that govern the evolution within this family: (1) a tendency toward reduction and elimination on the 4th endopod; (2) a differentiation developing the haptic potential; (3) maintenance of relatively original and primitive types in the orbits 4 to 6. The Parastenocaridae inhabit interstitial limnic habitats and reveal 12 series of trends, distributed in the Palaearctic, Nearctic, Oriental, Ethiopic and Neotropic regions. They are classified into 26 genera, of Which 24 are new to science., To the author's knowledge, this is the first time that an orbital model is presented to coordinate the structural trends of the endopod of the fourth leg (♂) in the parastenocarids. The model is based on more than 100 described species. This method allows to distinguish three natural principles that govern the evolution within this family: (1) a tendency toward reduction and elimination on the 4th endopod; (2) a differentiation developing the haptic potential; (3) maintenance of relatively original and primitive types in the orbits 4 to 6. The Parastenocaridae inhabit interstitial limnic habitats and reveal 12 series of trends, distributed in the Palaearctic, Nearctic, Oriental, Ethiopic and Neotropic regions. They are classified into 26 genera, of Which 24 are new to science.]

Affiliations: 1: Departamento de Zoologia da Universidade Federal do Paranä, Curitiba, Brasilien

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/content/journals/10.1163/156854072x00390
1972-01-01
2016-07-25

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