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On the morphology and life-history of Steringotrema pagelli (Van Beneden, 1871) Odhner, 1911 and Fellodistomum fellis (Olsson, 1868) Nicoll, 1909 [syn. S. ovacutum (Lebour, 1908) Yamaguti, 1953] (Trematoda, Fellodistomidae)
Køie, M. (1980). On the morphology and life-history of Steringotrema pagelli (Van Beneden, 1871) Odhner, 1911 and Fellodistomum fellis (Olsson, 1868) Nicoll, 1909 [syn. S. ovacutum (Lebour, 1908) Yamaguti, 1953] (Trematoda, Fellodistomidae). Ophelia 19(2): 215-236
In: Ophelia: International Journal of Marine Biology. Ophelia Publications: Helsingør. ISSN 0078-5326, more
Peer reviewed article  

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Keywords
    Life history; Morphology (organisms); Parasites; Fellodistomum fellis (Olsson, 1868) Nicoll, 1909 [WoRMS]; Steringotrema pagelli (Van Beneden, 1871) Odhner, 1911 [WoRMS]; Marine

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  • Køie, M.

Abstract
    The cercaria of S. pagelli develops in sporocysts in the bivalve N. nitidosa and N. nucleus. The cercaria has two long contractile tail furcae. The cercaria is swallowed by the final host, lemon sole Microstomus kitt and dab Limanda limanda. The life-cycle of S. ovacutum is identical to that of F. stomum fellis worked out in the Barents Sea. The furcocercous cercaria emerges from N. tenuis and is eaten by the brittle stars Ophiura albida, O. Sarsi and Amphiura chiajei . Catfish Anarhichas lupus, long rough dab Hippoglossoides platessoides and plaice Pleuronectes platessa are infested by eating the brittle stars. S. ovacutum is thus a synonym of F. fellis. The cercariae of S. pagelli and F. fellis are redescribed. The developmental stages of both species are described, based on steroscan electron microscope observations. The life-cycle of fellodistomid trematodes are separated into four groups according to the first host and the morphology of the circariae.

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