Site Selectivity of the Pit Oichnus excavatus Donovan and Jagt Infesting Hemipneustes striatoradiatus (Leske) (Echinoidea) in the Type Maastrichtian (Upper Cretaceous, The Netherlands)
Site Selectivity of the Pit Oichnus excavatus Donovan and Jagt Infesting Hemipneustes striatoradiatus (Leske) (Echinoidea) in the Type Maastrichtian (Upper Cretaceous, The Netherlands)
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马斯特里赫特阶（荷兰上白垩统）中感染 Hemipneustes striatorradiatus (Leske) (Echinoidea) 的 Pit Oichnus excavatus Donovan 和 Jagt 的地点选择性
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Jagt
中科院分区：
文献类型：
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作者：
S. Donovan;J. Jagt
来自马斯特里赫特阶（上白垩纪）模式区的全小行星海胆类Hemipneustes striatoradiatus（Leske）的两个测试，具有各种各样的episkeletozoans（牡蛎，苔藓虫群和serpulids），钻孔（可能是Caulostrepsis isp.，单棘齿象（Oichnus simplex Bromley）、表面磨损（颚象？isp.），和凹坑（O.漏斗形菌Donovan和Jagt）。只有O.漏斗虫是死前感染在一个标本中，这个遗迹种的四个单独的坑每个都与不同的步带和孔对，在生活中，孔呼吸管脚;前步带，不同的总形态，没有被感染。在第二次测试中，四个相同的步带中有三个被感染，尽管也有O。间枝带有漏斗状突起。O.棘突的漏斗形和步带，因此它的管足，是开放的几个合理的解释，但最有可能提供某种形式的喂养或保护优势，以坑形成的有机体。
Two tests of the holasteroid echinoid Hemipneustes striatoradiatus (Leske) from the type area of the Maastrichtian Stage (Upper Cretaceous) bear a varied infestation of episkeletozoans (oysters, bryozoan colony, and serpulids), borings (probable Caulostrepsis isp., Oichnus simplex Bromley), surface abrasion (Gnathichnus? isp.), and pits (O. excavatus Donovan and Jagt). Only O. excavatus represents a premortem infestation. In one specimen, the four individual pits of this ichnospecies are each associated with a different ambulacrum and pore pairs that, in life, bore respiratory tube feet; the anterior ambulacrum, of different gross morphology, is not infested. In the second test, three out of four of the same ambulacra are infested, although there are also O. excavatus in the interambulacra. The association between O. excavatus and the ambulacra of the echinoid, and thus its tube feet, is open to several plausible explanations, but most likely provided some form of feeding or protective advantage to the pit-forming organism.