Species Delimitation and Description of Mesocriconema nebraskense n. sp. (Nematoda: Criconematidae), a Morphologically Cryptic, Parthenogenetic Species from North American Grasslands.
نویسندگان
چکیده
Nematode surveys of North American grasslands conducted from 2010 to 2015 frequently recovered a species of criconematid nematode morphologically resembling Mesocriconema curvatum. These specimens were recovered from remnant native prairies in the central tallgrass ecoregion of North America, and not from surrounding agroecosystems. Historical records indicate that M. curvatum is a cosmopolitan species feeding on a wide range of agronomic and native plants. DNA barcoding indicates North American grasslands contain at least 10 phylogenetically distinct lineages of Mesocriconema that resemble, but are not, M. curvatum. Analysis of the two most common lineages reveals two distinctly different population structures. The variation in population structure suggests unique evolutionary histories associated with their diversification. These two major lineages share a sympatric distribution and their slight morphological differences contrast with a high level of genetic separation. Based on their genetic divergence, fixed diagnostic nucleotides, population structure, species delimitation metrics, and a sympatric distribution, we believe that one of these distinct lineages warrants formal nomenclatural recognition. Herein, we provide formal recognition for Mesocriconema nebraskense n. sp. and discuss its relationship to other Mesocriconema lineages discovered in native North American grasslands.
منابع مشابه
Taxonomic and molecular identification of mesocriconema and criconemoides species (nematoda: criconematidae).
Populations of Mesocriconema curvatum, M. kirjanovae, M. onoense, M. ornatum, M. sphaerocephala, M. surinamense, M. vadense, M. xenoplax, and Criconemoides informis from different geographical areas in the continental United States were characterized morphologically and molecularly. A new ring nematode from Washington County, Arkansas, is also described and named Mesocriconema ozarkiense n. sp....
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1. Diab, K. A., and W. R. Jenkins. 1966. Three new species ofCriconemoides (Nematoda: Criconematidae). Proceedings of the Helminthological Society of Washington 33:5-7. 2. Hooper, D.J., and R. F. Myers. 1971. Aphelenchoides rutgersi n. sp. (Nematoda: Aphelenchoidea), description and morphometrics, with observations on A. dactylocercus Hooper, 1958 and A. cibolensis Riffle, 1970. Nematologica 17...
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عنوان ژورنال:
- Journal of nematology
دوره 49 1 شماره
صفحات -
تاریخ انتشار 2017