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Acontia and mesentery nematocysts of the sea anemone Metridium senile (Linnaeus, 1761) (Cnidaria: Anthozoa)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2010 (English)In: Scientia Marina, ISSN 0214-8358, E-ISSN 1886-8134, Vol. 74, no 3, 483-497 p.Article in journal (Refereed) Published
Abstract [en]

Acontia and mesentery nematocysts of Metridium senile (Linnaeus, 1761) are described from interference-contrast light micrographs (LMs) and scanning electron micrographs (SEMs). The acontia have 2 nematocyst categories grouped into small, medium and large size-classes, including 5 types: of these, large b-mastigophores and large p-amastigophores are the largest and most abundant. Mesenterial tissues, characterised by small p-mastigophores and medium p-amastigophores, have 3 nematocyst categories grouped as small and medium, including 6 types. Attention is given to nematocyst maturation, especially to the differentiation of the shaft into proximal and main regions as helical folding of the shaft wall proceeds. Groups of differentiating nematoblasts occur along acontia, and near the junction between acontia and mesenterial filaments. Nematoblasts are sparsely found throughout mesenterial tissues.

Place, publisher, year, edition, pages
[Ostman, Carina] Uppsala Univ, Evolutionary Biol Ctr, SE-75236 Uppsala, Sweden. [Roat, Carsten] Umea Univ, Dept Ecol Environm & Geol, SE-90187 Umea, Sweden., 2010. Vol. 74, no 3, 483-497 p.
Keyword [en]
cnidae, SEM, acontia, mesenterial filaments
National Category
URN: urn:nbn:se:umu:diva-109692DOI: 10.3989/scimar.2010.74n3483ISI: 000280917100007OAI: diva2:858924
Available from: 2015-10-05 Created: 2015-10-05 Last updated: 2015-10-05Bibliographically approved

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