Deep-water cirripedes colonizing dead shells of the cephalopod Nautilus macromphalus from New Caledonian waters  

作　　者：John BUCKERIDGE TomášKOČÍ Ján SCHLÖGL Adam TOMAŠOVÝCH Martina KOČOVÁVESELSKÁ 

机构地区：[1]Earth&Oceanic Systems Group,RMIT University,Melbourne,Victoria,Australia [2]Ivančická581,Prague,Czech Republic and Palaeontological Department,Natural History Museum,National Museum,Prague,Czech Republic [3]Department of Geology and Paleontology,Comenius University in Bratislava,Bratislava,Slovakia [4]Institute of Earth Sciences,Slovak Academy of Sciences,Bratislava,Slovakia [5]Department of Paleobiology and Paleoecology,Institute of Geology of the Czech Academy of Sciences,Prague,Czech Republic [6]Museums Victoria,Melbourne,Victoria,Australia [7]Faculty of Science,Charles University in Prague,Prague,Czech Republic

出　　处：《Integrative Zoology》2019年第6期561-575,共15页整合动物学（英文版）

基　　金：the Ministry of Cul­ture of the Czech Republic(IP DKRVO 2019/2.III.a,National Museum,00023272);MKVs research was supported by the Center for Geosphere Dynamics(UNCE/SCI/006);by the RVO 67985831 of the In­stitute of Geology of the Czech Academy of Sciences.JS and AT were funded by the Slovak Scientific Grant Agency(VEGA 2/0169/19);by the Slovak Agency for Research and Development(APVV 17-0555).

摘　　要：Fossil cephalopods are frequently encrusted by epibionts;however,determining whether encrustation occurred prior to or post-mortem to the host,and whether the final environment of deposition corresponds to the habitat of encrustation is complex.The present paper describes cirripede epibionts,their calcareous bases and their at­tachment scars on 6 post-mortem shells of Nautilus macromphalus,collected from deep water off New Cale­donia.The cirripedes have left both cemented calcareous bases of Hexelasma and scars associated with bio­erosion and discoloration produced by verrucomorph barnacles.Live cirripedes included a Metaverruca recta,with articulated opercular plates and organic tissue(on a shell that had been exposed on the sea floor for at least 150 years),and specimens of Hexelasma velutinum,one of which was partly attached to an internal surface of a shell.The disposition of verrucomorphs indicates that most Nautilus shells were colonized post-mortem rather than during a floating stage.However,as cirripedes are known to have colonized living Nautilus,some Hexelas­ma,preserved only as calcareous eroded bases,may represent specimens that settled on a living Nautilus.The degree of bioerosion and discoloration induced by verrucomorph barnacles varies according to the surface pres­ervation of Nautilus shells,with deeper and discolored traces preserved on old and degraded shells.Traces made by verrucomorphs described here are ellipsoidal and a new ichnotaxon,Anellusichnus ellipticus,is proposed to accommodate them.Importantly,verrucomorphs and other cirripede taxa with membranous bases that were at­tached to pristine shells may not leave any substantial scars,and,thus,will be difficult to detect in the fossil re­cord.

关 键 词：Anellusichnus ellipticus isp.nov cirripedes EPIBIONTS Hexelasma velutinum Metaverruca recta 

分 类 号：X70[环境科学与工程—环境工程]