Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)
- Volume 22 Issue 4
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- Pages.214-218
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- 1989
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- 0374-8111(pISSN)
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- 2287-8815(eISSN)
Morphology of the Gastric Mill of Nyctiphanes australis(Euphausiacea, Crustacea)
Abstract
SEM observation revealed that the gastric mill of Nyctiphanes australis consists of paired cluster spines and paired lateral teeth, while the filter-press is absent. The morphology of the gastric mill was extremely constant; the numbers of both setiform processes of cluster spines and serrated spines of lateral teeth increased with increasing body length. The cluster spines of N. australis consisted of a single row of stout setiform processes but the lateral teeth comprised a large projection with small serrated spines. The cluster spines are symmetrical in setiform process distribution, however, the lateral teeth are asymmetrical in number of serrated spines.
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