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Acontia and mesentery nematocysts of the sea anemone Metridium senile (Linnaeus, 1761) (Cnidaria Anthozoa)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organism Biology, Evolution and Developmental Biology.
Uppsala University.
Uppsala University.
2010 (English)In: Scientia Marina, ISSN 0214-8358, 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
2010. Vol. 74, no 3, 483-497 p.
Keyword [en]
cnidae, SEM, acontia, mesenterial filaments
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-134954DOI: 10.3989/scimar.2010.74n3483ISI: 000280917100007OAI: oai:DiVA.org:uu-134954DiVA: diva2:375161
Available from: 2010-12-07 Created: 2010-12-03 Last updated: 2011-03-09Bibliographically approved

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