New insights into Plectospira genus (Oomycetes, Straminipila): morphological and molecular analyses Author Jerônimo, Gustavo Henrique Instituto de Botânica, Núcleo de Pesquisa em Micologia, Av. Miguel Stéfano 3687, CEP 04301 - 912, São Paulo, SP, Brazil Author Jesus, Ana L. Instituto de Botânica, Núcleo de Pesquisa em Micologia, Av. Miguel Stéfano 3687, CEP 04301 - 912, São Paulo, SP, Brazil Author Rocha, Sarah C. O. Instituto de Botânica, Núcleo de Pesquisa em Micologia, Av. Miguel Stéfano 3687, CEP 04301 - 912, São Paulo, SP, Brazil Author Gonçalves, Danilo R. Author Pires-Zottarelli, Carmen L. A. Instituto de Botânica, Núcleo de Pesquisa em Micologia, Av. Miguel Stéfano 3687, CEP 04301 - 912, São Paulo, SP, Brazil text Phytotaxa 2017 2017-05-26 307 3 191 198 http://dx.doi.org/10.11646/phytotaxa.307.3.3 journal article 10.11646/phytotaxa.307.3.3 1179-3163 13698720 Plectospira myriandra Drechsler (1927: 294) Fig 2. A–J Mycelium dense; hyphae slender, sparingly branched. Inflated elements of sporangia abundant, which produces a long tube to release the zoospores. Zoospores forming an evanescent cluster in exit orifice and encysting with usually 8–11 μm diam. Gemmae absent. Oogonia mostly laterally, rarely terminal on short branches, smooth, spherical, 20–30 μm diam., provided with wall of 1.0–2.0 μm in thickness. Antheridia always present, diclinous, rarely monoclinous, ranging from 2 to 15 or more. Oospore single, yellow, subcentric, spherical, 13.7–22 μm in diam. Specimen examined: — BRAZIL . São Paulo : Cananéia, “Parque Estadual da Ilha do Cardoso (PEIC)”, from soil sample, 20 August 2012 , CCIBt 3992. Notes: —The isolates CCIBt 3992 and CCIBt 3372 ( Jesus et al. 2013 ) of Plectospira myriandra presented all characteristics mentioned in its original descriptions ( Drechsler 1927 ), and are in agreement with other three studies previously published in Brazil ( Rocha 2006 , Gomes et al. 2003 , Miranda & Pires-Zottarelli 2012 ). In addition, the features mentioned above, which are shown in Table 2 and Figure 2 , were crucial for a correct identification of this species.