Rhizocorallites Müller, 1955 from the Triassic and Jurassic of Germany: burrow, coprolite, or cololite?
Rhizocorallites Müller, 1955 from the Triassic and Jurassic of Germany: burrow, coprolite, or cololite?
复制标题
根珊瑚 Müller，1955 年，来自德国三叠纪和侏罗纪：洞穴、粪化石还是粪化石？
作者：
D. Knaust
Rhizocorallites articularis m<e:1> ller， 1955是日耳曼盆地中三叠世（安尼西期）边缘海相沉积中已知的具有均匀充填和横向分割的弦状沉积集合体。它们最好以缠绕和弯曲的弦出现在薄的风暴层（暴风雨）的底部。最初被解释为管状环节动物的住所或类似于带的回填洞穴，对类型和补充材料的重新调查显示，其特征更符合一种解释，即粪便串（即粪石）或肠道内容物（即粪石）由一个底栖生物留下。与现代类似物的比较表明，holothurians可能是骨齿龙的潜在生产者。这一点得到了一个准原型标本的证实，除了分段的弦状聚集体外，还保存了其他连接器官，这些器官被解释为腐烂的全息图龙的胃、肠、直肠和泄殖腔。腐烂海参的不同埋藏路径导致了不同的保存方式，从与沉积物一起埋葬的保存（腐烂）到通过水流和事件沉积物的重新加工。德国南部上侏罗统（铁桑统）石刻石灰岩的同类标本归属于Rhizocorallites inaequalis isp。11月和11月，由于它们的特殊保存部分在holothurian的尸体中，证实了cololites的起源。世界各地对根珊瑚石的记录表明，根珊瑚石在上奥陶统至上白垩统分布广泛。
Rhizocorallites articularis Müller, 1955 are string-shaped sediment aggregates with a homogeneous fill and transverse segmentation, known from marginal-marine deposits of the Middle Triassic (Anisian) of the Germanic Basin. They preferably occur as winding and bent strings at the base of thin storm layers (tempestites). Originally interpreted as the dwellings of a tubiculous annelid or a backfilled burrow similar to Taenidium, a reinvestigation of the type and supplementary material reveals characteristics more conformable with an interpretation as the faecal string (i.e., coprolite) or intestine content (i.e., cololite) left by an epibenthic organism. Comparison with modern analogues suggests holothurians as potential producers of R. articularis. This is confirmed by one of the paratype specimens that, in addition to the segmented string-shaped aggregate, preserved other connecting organs interpreted as stomach, intestine, rectum, and cloaca of a decaying holothurian. Different taphonomic pathways of decaying sea cucumbers result in varying styles of preservation, reaching from conservation (obrution) by burial with sediment to reworking by currents and incorporation into event deposits. Comparable specimens from the Upper Jurassic (Tithonian) lithographic limestone of southern Germany are assigned to Rhizocorallites inaequalis isp. nov. and, due to their exceptional preservation partly within the carcasses of holothurians, confirm an origin as cololites. Several records of Rhizocorallites from different parts of the world indicate its wide distribution from the Upper Ordovician to the Upper Cretaceous.
DOI：
10.1201/b13769-5
发表时间：
2013
期刊：
影响因子：
--
作者：
通讯作者：
--