Cladocera: Proceedings of the Cladocera Symposium, Budapest by B. Entz, D. Lukács (auth.), László Forró, David G. Frey

By B. Entz, D. Lukács (auth.), László Forró, David G. Frey (eds.)

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Apart from Penilia the difference is very striking, and there is no anomopod whose maxillule has four such well developed spines as in this genus. Again, however, the differences could be interpreted either as being derived from a common ancestor or as indicative of wide phyletic separation. g. antennal armature), is marine, while all other ctenopods are freshwater. This suggests a long separation of the gene pools of Penilia and other ctenopods. When the many fundamental differences between ctenopods and anomopods are considered, the reduction in the number of spines in the maxillule of Penilia seems more likely to have been an independent trend that arose in the marine line leading to that genus than an indication of relationship to the Anomopoda.

India 63: 95 -141. , 1963. Einige Bemerkungen zu vier indischen Entomostraken. Int. Revues ges. Hydrobiol. 48: 159 -172. Fernando, C. H. & A. Kanduru, 1984. Some remarks on the latitudinal distribution of Cladocera on the Indian subcontinent. Hydrobiologia 113: 69 -76. Michael, R. G. & D. G. Frey, 1983. Assumed Amphi-Atiantic distribution of Oxyurella tenuicaudis (Cladocera, Chydoridae) denied by a new species from North America. Hydrobiologia 106: 3 - 35. Michael, R. G. & D. G. Frey, 1984. Separation of Disparalona leei (Chien, 1970) in North America from D.

40. Fig. 41. Fig. 42. head with antennule and labrum; head, ventral aspect; mandible; terminal claw of a postabdomen; antennule; 1st maxilla; male, head, lateral aspect, lake Bolon, Aug. 31, 1937; idem, ventral aspect. 41 cone, flattened laterally. Total length of head from basis of labrum to top equals about one-half of carapace length. Frontal part of head vaulted, where compound eye is situated; no ocellus. Dorsal part filled with two bands of strong muscles extending between head-top and basis of antennae (ventral aspect).

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