A New Cerithioidean Genus Megistocerithium (Gastropoda; Mollusca) from the Miocene of Southeast Asia: A Possible Relict of Mesozoic “Eustomatidae”
A New Cerithioidean Genus Megistocerithium (Gastropoda; Mollusca) from the Miocene of Southeast Asia: A Possible Relict of Mesozoic “Eustomatidae”
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DOI：
10.2517/2015pr013
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发表时间：
2015-10
期刊：
影响因子：
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通讯作者：
T. Kase;Y. Kurihara;Y. M. Aguilar;H. Pandita;A. Fernando;H. Hayashi
中科院分区：
文献类型：
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作者：
T. Kase;Y. Kurihara;Y. M. Aguilar;H. Pandita;A. Fernando;H. Hayashi
摘要。本文根据爪哇、印度尼西亚和菲律宾中新世中期地层中发现的大型锥状腹足类标本，描述了一个新属和新种——magoi Megistocerithium。菲律宾中新世下部和上部地层的10个碎片标本暂定为本种。M. magoi Kase sp. 11 .是最大的化石cerithiidea腹足类动物之一（除了Turritellidae）。它是潮间带沙质泥滩的居民，可能靠近红树林。在新生代未发现与该种同源的种。另一方面，M. magoi Kase gen. et sp. 11 .与中侏罗世的Eustoma tuberlosa（一属的模式种，属于尚未被充分认识的Eustomatidae科）具有相同的孔径特征。M. magoi Kase gen.et sp. 11 .可能是中生代造口虫科的遗存。据推测，它是一种以红树凋落物为食的动物，就像现代红树沼泽中的红树属和望远镜属一样。
Abstract. Based upon large cerithiform gastropod specimens from the middle Miocene beds of Java, Indonesia and the Philippines, a new genus and new species, Megistocerithium magoi, is described herein. Ten fragmentary specimens from the lower and upper Miocene beds of the Philippines are tentatively referred to this species. M. magoi Kase sp. nov. is amongst the largest fossil cerithioidean gastropods (except for Turritellidae). It was a dweller in intertidal sandy mudflats, probably in close proximity to mangrove forests. No species considered to be congeneric with this species have been found in the Cenozoic. On the other hand, M. magoi Kase gen. et sp. nov. shares apertural characters with the Middle Jurassic species Eustoma tuberculosa, the type species of a genus belonging to the yet to be well-recognized family Eustomatidae. M. magoi Kase gen.et sp. nov. is possibly a relict of the Mesozoic Eustomatidae. It is assumed to have been a grazer on mangrove litter like the potamidid genera Terebralia and Telescopium in modern mangrove swamps.