ディメトロドンbyoldworldGeneralSynapsid0Synapsid (単弓類) is a group of tetrapods. Terrestrial champions of the Permian. 0EditEdit History1,412070Last updated: 872 days agoReport a problem日本語Contents1 Overview2 External Links3 Article in Other LanguagesOverviewSynapsid (単弓類) is called this because there is one hole on each side of the skull. The "bow" represents this hole called the temporal window.External LinksSynapsid - WikipediaArticle in Other Languages単弓類Related ArticlesParent ArticleAmnioteChild ArticleTherapsidSibling ArticleSauropsidaCommentsComment field is emptyIllustrations on pixivShow allCtenospondylus - eurhinodelphisUkrDrawings1999Sphenacodon and rhomaleosaurusUkrDrawings1999