Abstract
Phylum Rotifera is typically defined by the presence of a (a) primary body cavity, (b) specialized ciliary apparatus called the corona located at the anterior end, and (c) jaw apparatus of hard parts (trophi) (e.g., de Beauchamp, 1965). To this list of characters Nielsen (1995) added (d) an intracytoplasmic skeletal lamina, (e) a retrocerebral apparatus, and (f) a foot with adhesive glands that open at the toes. On the basis of ultrastructural studies other distinctive characters for the phylum have been proposed (Clément & Wurdak, 1991): (g) absence of collagen, (h) a glia-free centralized nervous system composed of a dorsal main ganglion (brain), (i) multiciliated flame cells. Other general characters have been added to the list (Nogrady et al., 1993): (1) a tiny, unsegmented body divided into three typical regions (head, trunk and a post-cloacal foot), and (k) sensory antennae present in variable numbers on the animal’s surface.
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Ricci, C. (1998). Opinion paper: Are lemnisci and proboscis present in the Bdelloidea?. In: Wurdak, E., Wallace, R., Segers, H. (eds) Rotifera VIII: A Comparative Approach. Developments in Hydrobiology, vol 134. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4782-8_13
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DOI: https://doi.org/10.1007/978-94-011-4782-8_13
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