Exceptionally preserved remains of Platyhelminthes (flatworms) and Nematoda (roundworms) are closely associated with ammonoids, nautiloids and asteroids in Middle Triassic carbonates of the Upper Muschelkalk Group in Germany. Although soft-bodied organisms occur in different parts of the succession, the reported examples indicate foraging and a possible scavenging relationship of these worms and their benefit from decaying soft parts. This is a rare record of Platyhelminthes and Nematodes, partly preserved at the termination of their traces, which adds to our patchy knowledge of Fossillagerstätten after the end-Permian mass extinction. It reveals foraging and scavenging worms on decaying soft parts of macrofauna and associated bacteria on a Middle Triassic carbonate mud flat. The composition of the Middle Triassic benthic communities might be remarkably similar to modern mud flats.

中文翻译：

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觅食行为中捕获的扁虫和蛔虫：来自德国中三叠纪泥滩的例子

保存完好的扁形虫（扁虫）和线虫（蛔虫）的残骸与德国上 Muschelkalk 群的中三叠纪碳酸盐中的菊石类、鹦鹉螺类和小行星密切相关。尽管软体生物出现在演替的不同部分，但报告的例子表明这些蠕虫的觅食和可能的清除关系以及它们从腐烂的软部分中受益。这是关于扁形动物和线虫的罕见记录，部分保存在它们的踪迹末端，这增加了我们在二叠纪末大规模灭绝后对 Fossillagerstätten 的零碎知识。它揭示了在中三叠纪碳酸盐泥滩上大型动物腐烂的柔软部分和相关细菌的觅食和清除蠕虫。