{"refrec":{"BRefID":287679,"RR":"<b>Irei, Y.; Sinniger, F.; Reimer, J.D.</b> (2015). Descriptions of two azooxanthellate <i>Palythoa</i> species (Subclass Hexacorallia, Order Zoantharia) from the Ryukyu Archipelago, southern Japan. <i>ZooKeys 478(478)</i>: 1-26. <a href=\"https://dx.doi.org/10.3897/zookeys.478.8512\" target=\"_blank\">https://dx.doi.org/10.3897/zookeys.478.8512</a>","BEntID":279704,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>ZooKeys 478(478)</i>: 1-26. <a href=\"https://dx.doi.org/10.3897/zookeys.478.8512\" target=\"_blank\">https://dx.doi.org/10.3897/zookeys.478.8512</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Irei, Y.; Sinniger, F.; Reimer, J.D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Irei, Y. <i>et al.</i>","Englishabstract":"Two new species of zoantharians (Hexacorallia, Zoantharia, Sphenopidae), <i>Palythoa mizigama</i> sp. n. and <i>P. umbrosa</i> sp. n., are described from the Ryukyu Archipelago, southern Japan. Unlike almost all other known <i>Palythoa</i> spp., both species are azooxanthellate and inhabit low-light environments such as floors or sides of caves, crevasses, or hollows of shallow coral reefs. The two species were initially considered to be the same species from their similar habitat environments and highly similar morphological features. However, phylogenetic analyses of nuclear internal transcribed spacer (ITS) ribosomal DNA, mitochondrial 16S ribosomal DNA, and cytochrome oxidase subunit I (COI) sequences revealed that these two species have a genetically distant relationship within the genus <i>Palythoa</i>. Morphological characteristics, including polyp size, tentacle number, external/internal coloration, and types and sizes of cnidae were examined in this study. As a result, only tentacle coloration was found to be useful for the morphological distinction between the two species. <i>Palythoa mizigama</i> possesses white tentacles with black horizontal stripes while <i>P. umbrosa</i> possesses white tentacles without any stripe patterns. Considering their distant phylogenetic relationship, it can be assumed that their unique yet similar morphological and ecological characteristics developed independently in each species as an example of parallel evolution.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Descriptions of two azooxanthellate <i>Palythoa</i> species (Subclass Hexacorallia, Order Zoantharia) from the Ryukyu Archipelago, southern Japan","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Cave-dwelling, cryptic species, ITS-rDNA, Ryukyu Archipelago, zoantharian","OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2017-08-07","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000349368100001","VABBcode":null,"OpenAcc":1,"DOI":"10.3897/zookeys.478.8512"},"refs":null,"anarec":{"AnaID":287679,"PubliDate":2015,"Pagination":"1-26","XtraPublOfAnaID":null,"ISBN":null,"Volume":"478","Issue":"478","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":188760,"SerRR":"ZooKeys. 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