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Minchinia louisiana n. sp. (Haplosporidia, Haplosporidiidae), A Parasite of Panopeus herbstii *
Author(s) -
SPRAGUE VICTOR
Publication year - 1963
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.1550-7408.1963.tb01676.x
Subject(s) - spore , biology , anatomy , sporangium , nucleolus , prophase , mitosis , body orifice , genus , chromatid , zoology , botany , chromosome , nucleus , meiosis , microbiology and biotechnology , genetics , gene
SYNOPSIS.Haplosporidium sp. Sprague, 1954, originally reported without description and now considered to belong to genus Minchinia , is described. Vegetative forms with two to many nuclei are common but the mode of vegetative multiplication is obscure. Mitotic division, as in related species, occurs without breakdown of the nuclear membrane and shows a conspicuous intradesmose. A complex endosome resembling an amphinucleolus gives rise during prophase to chromosomes, nucleolus and (probably) centrioles. The minute chromosomes are not easily resolved or distinguished from other nuclear elements but their number is of the order of 3 to 6. Mature spores are ovoid and average about 12.1 μ by 8.4 μ when fixed and stained. The spore wall, about 1 μ thick, contains a circular orifice 2 μ in diameter. An operculum arising from the outer gelatinous coat covers the orifice. The single uninucleate sporoplasm is attached anteriorly to the perimeter of the orifice. Cysts are spherical and with variable number of spores, usually too many spores to count but rarely as few as 8 or 16.