Abstract Bioclast lined tubes of Schaubcylindrichnus coronus are not much reported around the world. As of now only two reports are available. Interestingly in both these reports and in the current find, tests of foraminifers are used as tube building material. Current report of Schaubcylindrichnus is from the subtidal deposits of the Naredi Formation (Ypresian) of Kachchh Basin, Western India. As the host rock here abounds in the tests of larger benthic foraminifera, concentration of same is noticed within the tubes. The natural selection of lighter and larger calcitic grains of tests over the heavier mineral grains is the main reason for presence of the tests in tube building; moreover, presence of inner smooth wall of tube also indicates organisms’ preference for comfort within their burrow.

中文翻译：

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有孔虫壁的 Schaubcylindrichnus coronus Frey 和 Howard，1981 年，来自印度西部 Kachchh 的中始新世

摘要 Schaubcylindrichnus coronus 的Bioclast 内衬管在世界范围内的报道并不多。截至目前，只有两份报告可用。有趣的是，在这些报告和目前的发现中，有孔虫的测试被用作管材。Schaubcylindrichnus 的当前报告来自印度西部 Kachchh 盆地 Naredi 组（Ypresian）的潮下沉积。由于这里的主岩在较大的底栖有孔虫的测试中比比皆是，因此在管内注意到相同的浓度。自然选择较轻和较大的方解石颗粒而不是较重的矿物颗粒是管道建造中存在测试的主要原因；此外，管内光滑壁的存在也表明生物体对洞穴内舒适的偏好。