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Nosema dollfusi n. sp. (Microsporidia, Nosematidae), a Hyperparasite of Bucephalus cuculus in Crassostrea virginica. *
Author(s) -
SPRAGUE VICTOR
Publication year - 1964
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1964.tb01767.x
Subject(s) - polar filament , microsporidia , nosema , biology , spore , crassostrea , zoology , anatomy , botany , ecology , oyster
SYNOPSIS. Sporocysts of the trematode Bucephalus cuculus McCrady in Maryland oysters, Crassostrea virginica (Gmelin), have been sometimes found to harbor a microsporidian parasite considered to be a new species of Nosema. The ovoid spores are about 3 by 2 ü in sectioned material. The spore membrane has a PAS positive mass at the anterior end. The polar filament extends inwardly from this end and coils within a posterior “vacuole.” An anterior “vacuole,” containing no visible structure besides the basal portion of the filament, is also present. The sporoplasm forms a girdle near the middle of the spore. It contains a tiny elongated chromatin mass believed to consist of two nuclei in close proximity.