First Report on the Chromosomes of Aeolosoma viride and Aeolosoma hemprichi (Aeolosomatidae; Annelida)

Ombretta Marescalchi; Andrea Gugnali; Rosanna Falconi

doi:10.2108/zsj.25.904

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Ombretta Marescalchi,^1,* Andrea Gugnali,¹ Rosanna Falconi¹

¹Università degli Studi, Dipartimento di Biologia Evoluzionistica Sperimentale, Via Selmi 3, 40126 Bo

^** Corresponding author. Phone: +39-051209-4174; Fax: +39-051209-4286; E-mail: ombretta.marescalchi@unibo.it

Abstract

Aeolosomatidae are cosmopolitan meiofaunal Annelida characterised by small size and almost exclusively asexual reproduction. This study is the first report on the chromosome morphology of two aeolosomatid species. Giemsa staining and propidium iodide labelling were performed. The somatic chromosome number of Aeolosoma viride was 2n=30 with many biarmed elements, whereas A. hemprichi showed 60 small chromosomes with a dot-like appearance. Asexual reproduction, with its clonal transmission of chromosomal repatternings, probably ensures the fixation of new karyotypes in species of Aeolosoma.

Citation Download Citation

Ombretta Marescalchi, Andrea Gugnali, and Rosanna Falconi "First Report on the Chromosomes of Aeolosoma viride and Aeolosoma hemprichi (Aeolosomatidae; Annelida)," Zoological Science 25(9), 904-906, (1 September 2008). https://doi.org/10.2108/zsj.25.904

Received: 22 November 2007; Accepted: 1 July 2008; Published: 1 September 2008

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