Late Pleistocene Red Sea Mollusca: 1. Polyplacophora Author Dell’Angelo, Bruno Author Landau, Bernard M. Author Sosso, Maurizio Author Taviani, Marco text Zootaxa 2020 2020-05-11 4772 3 401 449 journal article 22261 10.11646/zootaxa.4772.3.1 d807f185-5391-4c8c-84c6-2550370b3cd3 1175-5326 3819654 F546A223-59A0-4DA1-9102-AD7BC482105F Genus Ischnochiton Gray, 1847 Type species. Chiton textilis Gray, 1828 , by subsequent designation ( Gray 1847: 168 ). For synonymy, see Kaas & Van Belle (1990) . Remarks. The diagnosis of subgenera within Ischnochiton is based mainly on girdle characters, not detectable in fossil species. Distribution. Ischnochiton is one of the most ancient extant genera, with a present-day circumglobal distribution, excluding the northern Atlantic and Arctic Oceans ( Kaas & Van Belle 1990 ). Beside a questionable record from the Jurassic of Germany ( Ischnochiton marloffsteinensis Fiedel & Keupp, 1988 ), the genus is present in the Eocene of Europe ( England and Ukraine ), the upper Eocene-lower Oligocene of Washington , U.S.A. ( Dell’Angelo et al . 2011a ), the Miocene to Pleistocene of Europe ( Dell’Angelo et al . 2004 , 2015 ; Garilli et al . 2005 ; Studencka & Dulai 2010 ), Africa ( Tanzania , Davis 1954 ), Australasia ( Ashby & Cotton 1939 ; Cotton & Godfrey 1940 ; Beu & Maxwell 1990 ), Indonesia ( Verbeek et al . 1882 ), Japan ( Itoigawa et al. 1976 ) and the U.S.A. ( Berry 1940 ). Ischnochiton sp. is the only chiton species reported from deep waters (> 400 m ) in the Red Sea ( Janssen & Taviani 2015 ).