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090			_aB-20652
245	1	0	_aA formal redefinition of the genera Nosema and Vairimorpha (Microsporidia: Nosematidae)and reassignment of species based on molecular phylogenetics
490	0		_vJournal of invertebrate Pathology, 169, p.107279, 2020
520	3		_aThe microsporidian genera Nosema and Vairimorpha comprise a clade described from insects. Currently the genus Nosema is defined as having a dimorphic life cycle characterized by diplokaryotic stages and diplosporoblastic sporogony with two functionally and morphologically distinct spore types ("early" or "primary" and "environmental"). The Vairimorpha life cycle, in addition to a Nosema-type diplokaryotic sporogony, includes an octosporoblastic sporogony producing eight uninucleate spores (octospores)within a sporophorous vesicle. Molecular phylogeny, however, has clearly demonstrated that the genera Nosema and Vairimorpha, characterized by the absence or presence of uninucleate octospores, respectively, represent two polyphyletic taxa, and that octosporogony is turned on and off frequently within taxa, depending on environmental factors such as host species and rearing temperature. In addition, recent studies have shown that both branches of the Vairimorpha-Nosema clade contain species that are uninucleate throughout their life cycle. The SSU rRNA gene sequence data reveal two distinct clades, those closely related to Vairimorpha necatrix, the type species for the genus Vairimorpha, and those closely related to Nosema bombycis, the type species for the genus Nosema. Here, we redefine the two genera, giving priority to molecular character states over those observed at the developmental, structural or ultrastructural levels and present a list of revised species designations. Using this approach, a series of species are renamed (combination novum)and members of two genera, Rugispora and Oligosporidium, are reassigned to Vairimorpha because of their phylogenetic position. Moreover, the family Nosematidae is redefined and includes the genera Nosema and Vairimorpha comprising a monophyletic lineage of Microsporidia.
650	1	4	_aMICROSPORIDIA
650	1	4	_aTAXONOMY
650	1	4	_aLIFE CYCLE
650	1	4	_aMOLECULAR GENETICS
650	1	4	_aPHYLOGENY
700	1	2	_aTokarev, Y. S.
700	1	2	_aHuang, W. F.
700	1	2	_aSolter, L. F.
700	1	2	_aMalysh, J. M.
700	1	2	_aBecnel, J. J.
700	1	2	_aVossbrinck, C. R.
856	4	0	_uhttps://drive.google.com/file/d/1ILHjlleX6iAhxzSatffYCd6HzajlU7rm/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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