{"refrec":{"BRefID":362775,"RR":"<b>Luo, Z.; Mertens, K.N.; Gu, H.; Wang, N.; Wu, Y.; Uttayarnmanee, P.; Pransilpa, M.; Roeroe, K.A.</b> (2021). Morphology, ultrastructure and molecular phylogeny of <i>Johsia chumphonensis</i> gen. et sp. nov. and <i>Parvodinium parvulum</i> comb. nov. (Peridiniopsidaceae, Dinophyceae). <i>Eur. J. Phycol. 56(3)</i>: 324-336. <a href=\"https://dx.doi.org/10.1080/09670262.2020.1829078\" target=\"_blank\">https://dx.doi.org/10.1080/09670262.2020.1829078</a>","BEntID":360493,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Eur. J. Phycol. 56(3)</i>: 324-336. <a href=\"https://dx.doi.org/10.1080/09670262.2020.1829078\" target=\"_blank\">https://dx.doi.org/10.1080/09670262.2020.1829078</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Luo, Z.; Mertens, K.N.; Gu, H.; Wang, N.; Wu, Y.; Uttayarnmanee, P.; Pransilpa, M.; Roeroe, K.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Luo, Z. <i>et al.</i>","Englishabstract":"The family Peridiniopsidaceae encompasses mainly freshwater species of the genera <i>Peridiniopsis, Palatinus</i> and <i>Parvodinium</i>. Only one benthic, marine species ‘<i>Scrippsiella</i>’ <i>hexapraecingula</i> has been attributed to this family. Here we established five strains by isolating single <i>Parvodinium</i>-like cells from the marine Gulf of Thailand, Hainan Island waters (China), off Manado (Indonesia) and from a freshwater reservoir in Fuzhou (China). All strains were examined with light, scanning and transmission electron microscopy, and their SSU, ITS-5.8S and partial LSU rRNA regions were sequenced. Four marine strains share a plate formula of Po, cp, X, 4′, 2a, 6′′, 6C, 4S, 5′′′, 2′′′′ and are herein attributed to a new genus <i>Johsia</i> as <i>J. chumphonensis</i> gen. et sp. nov. Its theca is characterized by an epitheca 1.5 times as long as the hypotheca in dorsal view and a 2a plate about half the size of 1a. A type B eyespot was observed in <i>J. chumphonensis</i> comprising two rows of lipid globules within a chloroplast with a single row of crystals overlying the eyespot. Production of spherical cysts was observed in culture. The freshwater strain shows a plate pattern of Po, cp, X, 4′, 2a, 7′′, 6C, 5S, 5′′′, 2′′′′, characterized by two unequal antapical plates and a lack of antapical spines, fitting the description of <i>Peridinium parvulum</i>, which was transferred to <i>Parvodinium</i> as <i>P. parvulum</i> comb. nov. In this species, a type A eyespot was observed comprising four rows of lipid globules within a chloroplast. A molecular phylogeny was inferred based on concatenated data from SSU, ITS-5.8S and partial LSU rRNA gene sequences using maximum likelihood and Bayesian inference. Our results show that <i>Johsia</i> is nested within the Peridiniopsidaceae and is a sister clade to <i>Peridiniopsis borgei</i> and the strain UTEX1948 identified as ‘<i>Scrippsiella</i>’ <i>hexapraecingula</i> with three anterior intercalary plates.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Morphology, ultrastructure and molecular phylogeny of <i>Johsia chumphonensis</i> gen. et sp. nov. and <i>Parvodinium parvulum</i> comb. nov. (Peridiniopsidaceae, Dinophyceae)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-07 01:31:53.213604","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Cyst; dinoflagellate; eyespot; freshwater; immotile cell; Peridinium parvulum","OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2023-05-23","DateCreate":"2023-03-27","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000597381200001","VABBcode":null,"OpenAcc":0,"DOI":"10.1080/09670262.2020.1829078"},"refs":null,"anarec":{"AnaID":362775,"PubliDate":2021,"Pagination":"324-336","XtraPublOfAnaID":null,"ISBN":null,"Volume":"56","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42675,"SerRR":"European Journal of Phycology. Cambridge University Press/Taylor & Francis: Cambridge.  ISSN 0967-0262; e-ISSN 1469-4433","StandardTitleSer":"European Journal of Phycology","ISSN":"0967-0262","AbbrevSer":"Eur. J. 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