Morphological variation in Pennella balaenoptera and P. filosa (Copepoda: Pennellidae) with a review of the genus Pennella Oken, 1816 parasitic on cetacea
Morphological variability in Pennella balaenoptera and P. filosa was examined. The anterior end of the parasite (cephalothorax, apical papillae and holdfast horns) exhibited the greatest variability between specimens of a single species. The genus Pennella from cetaceans was reviewed; five species (P. antarctica. P. anthonyi, P. cetti. P. charcoti. P. crassicornis) being synonymized with P. balaenoptera. The structure of the first antennae (segment length and thickness) is proposed as a possible useful feature for distinguishing the teleost parasite P. filosa from P. balaenoptera found on whales. The variability of morphological characters was found to be responsible for the difficulty in differentiating species of Pennella.
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Document Type: Research Article
Publication date: 01 May 1987
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