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Revision of the Family D uboscquellidae with Description of E uduboscquella crenulata n. gen., n. sp. ( D inoflagellata, S yndinea), an Intracellular Parasite of the Ciliate F avella panamensis Kofoid & Campbell, [Kofoid, C. A., 1929]
Author(s) -
Coats D. Wayne,
Bachvaroff Tsvetan R.,
Delwiche Charles F.
Publication year - 2012
Publication title -
journal of eukaryotic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 1066-5234
DOI - 10.1111/j.1550-7408.2011.00588.x
Subject(s) - biology , zygote , sporogenesis , spore , botany , genus , intracellular , dinoflagellate , zoology , microbiology and biotechnology , genetics , gene , embryogenesis
Recent recognition that tintinnids are infected by dinophycean as well as syndinean parasites prompts taxonomic revision of dinoflagellate species that parasitize these ciliates. Long overlooked features of the type species D uboscquella tintinnicola are used to emend the genus and family D uboscquellidae, resulting in both taxa being moved from the S yndinea to the D inophyceae. S yndinean species previously classified as D uboscquella are relocated to E uduboscquella n. gen., with E uduboscquella crenulata n. sp. as the type. As an endoparasitic species, E . crenulata shares with its congeners processes associated with intracellular development and sporogenesis, but differs from closely related species in nuclear and cortical morphology of the trophont, including a distinctively grooved shield (= episome) that imparts a crenulated appearance in optical section. In addition, E . crenulata produces three morphologically distinct spore types, two of which undergo syngamy to form a uninucleate zygote. The zygote undergoes successive division to produce four daughter cells of unequal size, but that resemble the nonmating spore type.