Sperm structure of Trichoptera. III. Hydropsychidae,polycentropodidae and philopotamidae (Annulipalpia) |
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| Institution: | 1. Dipartimento di Biologia Evolutiva, Università di Siena, I-53100 Siena, Italy;2. Department of Ultrastructure Research, Biology Building E-4, Stockholm University, S-106 91 Stockholm, Sweden;1. Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal;2. Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal;1. Department of Entomology, Faculty of Biology, St. Petersburg State University, 199034, Universitrtskaya 7/9, St. Petersburg, Russia;2. Sechenov Institute of Evolutionary Physiology and Biochemistry, 194223, Torez Pr. 44, St. Petersburg, Russia;1. CBMA - Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal;2. IB-S - Institute of Science and Innovation for Bio-Sustainability, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal;3. CESAM - Center for Environment and Marine Studies, University of Aveiro, Campus of Santiago, 3810-193, Aveiro, Portugal;1. Department of Entomology, The Hebrew University, Rehovot, Israel;2. Department of Molecular Genetics, The Ohio State University, Columbus, OH, USA;1. Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal;2. Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal |
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| Abstract: | Spermatozoa from 9 species belonging to 3 families of trichopteran suborder Annulipalpia (Philopotamidae : Philopotamus ludificatus, P. montanus, Wormaldia occipitalis, W. copiosa; Polycentropodidae: Plectrocnemia geniculata, Polycentropus mortoni, P. irroratus, Cyrnus trimaculatus; Hydropsychidae: Hydropsyche pellucidula) were studied by light, scanning, and transmission electron microscopy. The absence of axonemal dynein arms and a consequent sperm immotility are characteristic of the species studied. The presence of 7, rather than 2, central microtubules is shared by Polycentropodidae and some Philopotamidae. A greater variability in the sperm axoneme was found within Philopotamidae than in the other families. The species of the genus Wormaldia have an axial vesicle rather than microtubules and their axonemes have a 9 + 9 + 0 or 13 + 13 + 0 pattern. Hydropsychidae have spermatozoa provided with numerous finger-like appendages containing microtubular doublets. The progressive loss of sperm flagellum and motility within the group is discussed. |
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