An SEM study of the jaws of Haplognathia rosea and Rastrognathia macrostoma (Gnathostomulida), with a preliminary comparison with the rotiferan trophi

Author: Sørensen, Martin V.¹

Source: Acta Zoologica, Volume 81, Number 1, February 2000 , pp. 9-16(8)

Publisher: Blackwell Publishing

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Abstract:

The preparation of gnathostomulid jaws for scanning electron microscopy is demonstrated, and descriptions of the jaws from Haplognathia rosea and Rastrognathia macrostoma are given. These jaws represent two different gnathostomulid jaw types, namely the `compact type' and the `basket type'. The described structures are compared with sclerites in the rotifer trophi, and some homologies are suggested. The observations support a close relationship between Gnathostomulida and Rotifera.

Document Type: Research article

DOI: 10.1046/j.1463-6395.2000.00032.x

Affiliations: 1: Invertebrate Department, Zoological Museum, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark, Gnathifera, Gnathostomulida, morphology, phylogeny, preparation, technique, Rotifera, SEM, trophi, jaws

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