caa a22 4500 445892676 CHVBK 20180317145621.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10750-010-0490-6 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0490-6 Developmental stages in diapausing eggs: an investigation across monogonont rotifer species [Elektronische Daten] [Chiara Boschetti, Francesca Leasi, Claudia Ricci] Monogononts reproduce by parthenogenesis punctuated by events of mixis that generate ‘resting eggs', which actually are embryos whose development is arrested. We document the nuclei number and position of the resting eggs of nine rotifer species (Brachionus plicatilis, B. calyciflorus, B. manjavacas, Plationus patulus, Epiphanes senta, E. chihuahuaensis, Rhinoglena frontalis, Lecane bulla and Sinantherina socialis) in the attempt to assess the stage at which dormant embryos are arrested. The morphology of the entire embryos was reconstructed visualising nuclear DNA using confocal microscopy, and their developmental stage identified. Two groups of species were identified: dormant embryos of one group possessed on average less than 30 nuclei, with low variation within and between species, and the stage may correspond to early gastrula; embryos in the second group contain relatively more nuclei, averaging around 40-60, with higher variation within species. The two groups of species seem not to reflect any phylogenetic relationship. Consequences of the dormant embryo stages are discussed. Springer Science+Business Media B.V., 2010 Monogonont rotifers nationallicence Resting eggs nationallicence Nuclei number nationallicence Developmental stage nationallicence Embryology nationallicence Diapause nationallicence Boschetti Chiara Dipartimento di Biologia, Università degli Studi di Milano, via Celoria 26, 20133, Milan, Italy aut Leasi Francesca Dipartimento di Biologia, Università degli Studi di Milano, via Celoria 26, 20133, Milan, Italy aut Ricci Claudia Dipartimento di Biologia, Università degli Studi di Milano, via Celoria 26, 20133, Milan, Italy aut Hydrobiologia Springer Netherlands 662/1(2011-03-01), 149-155 0018-8158 662:1<149 2011 662 10750 https://doi.org/10.1007/s10750-010-0490-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0490-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Boschetti Chiara Dipartimento di Biologia, Università degli Studi di Milano, via Celoria 26, 20133, Milan, Italy aut NATIONALLICENCE 700 1- Leasi Francesca Dipartimento di Biologia, Università degli Studi di Milano, via Celoria 26, 20133, Milan, Italy aut NATIONALLICENCE 700 1- Ricci Claudia Dipartimento di Biologia, Università degli Studi di Milano, via Celoria 26, 20133, Milan, Italy aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 662/1(2011-03-01), 149-155 0018-8158 662:1<149 2011 662 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer