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New sperm types in Naididae and Lumbriculidae (Annelida: Oligochaeta) and their possible phylogenetic implications
Ferraguti, M.; Erséus, C.; Kaygorodova, I.; Martin, P. (1999). New sperm types in Naididae and Lumbriculidae (Annelida: Oligochaeta) and their possible phylogenetic implications. Hydrobiologia 406: 213-222
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158, more
Peer reviewed article  

Also published as
  • Ferraguti, M.; Erséus, C.; Kaygorodova, I.; Martin, P. (1999). New sperm types in Naididae and Lumbriculidae (Annelida: Oligochaeta) and their possible phylogenetic implications, in: Healy, B.M. et al. (Ed.) Aquatic Oligochaetes: Proceedings of the 7th International Symposium on Aquatic Oligochaetes held in Presque Isle, Maine, USA, 18-22 August 1997. Developments in Hydrobiology, 139: pp. 213-222, more

Available in  Authors 

Keywords
    Evolution; Phylogeny; Sperm; Ultrastructure; Hirudinea [WoRMS]; Naididae Ehrenberg, 1828 [WoRMS]; Oligochaeta [WoRMS]; Tubificidae Vejdovský, 1884 [WoRMS]; Marine

Authors  Top 
  • Ferraguti, M.
  • Erséus, C., more
  • Kaygorodova, I.
  • Martin, P., more

Abstract
    The sperm ultrastructure of three Naididae (Paranais frici, P. litoralis and Stylaria lacustris) and two Lumbriculidae (Rhynchelmis brachycephala and R. alyonae) is decribed to supply spermatological evidence towards a better understanding of the phylogeny of the two families. Naidid spermatozoa were found to be similar to one another, particularly with regard to the acrosome (with the acrosome tube bent to one side), and the shape and number of mitochondria. The various morphological characters do not militate against the previously proposed inclusion of naidids within the Tubificidae. The two lumbriculid species examined showed a characteristic conical indentation at the apex of the nucleus, a feature up to now described only in Branchiobdellida, an annelid group with possible affinities to Lumbriculidae.

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