The first well-preserved soft-body imprint of a fossil squid was discovered from the Lower Oligocene of the Krasnodar region, Russia. The squid is perfectly preserved, with many details of its body available for study, such as imprints of eyes and head, a pair of statoliths, jaws, and stomach contents. Statoliths of this squid are the first finds of in situ statoliths in fossil non-belemnoid coleoids, and their shape is characteristic of the genus Loligo (family Loliginidae). Although some Mesozoic coleoids were previously classified as teuthids, these finds remain controversial and the squid described herein is the first unquestionable representative of fossil Teuthida known to date. It should be noted that the squid is preserved not due to phosphatization, which is typical for fossil coleoids, but by pyritization and carbonization. Numerous fish remains in the stomach contents of the squid indicate its piscivorous diet. A small cutlassfish Anenchelum angustum, which was buried together with the squid and whose bones are located near the squid's jaws, sheds light on the circumstances of the death of this animal. Most likely, the squid suffocated in the anoxic bottom waters, where it drowned along with its last prey (distraction sinking).

中文翻译：

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首次发现渐新世鱿鱼化石的软体印记表明其以鱼为食

在俄罗斯克拉斯诺达尔地区的下渐新世发现了第一个保存完好的乌贼化石软体印记。鱿鱼保存完好，其身体的许多细节可供研究，例如眼睛和头部的印记、一对石碑、下巴和胃内容物。这种鱿鱼的静石是在化石非贝伦类胶体中首次发现的原位静石，它们的形状是洛利戈属的特征（罗氏科）。尽管一些中生代的胶体以前被归类为 teuthids，但这些发现仍然存在争议，本文描述的鱿鱼是迄今为止已知的第一个无可置疑的 Teuthida 化石代表。应该注意的是，鱿鱼的保存不是由于化石胶体典型的磷化作用，而是由于黄铁矿化和碳化。乌贼的胃内容物中残留的大量鱼表明其以鱼为食。一条与鱿鱼一起埋葬的小弯刀Anenchelum angustum，它的骨头位于鱿鱼的下颚附近，它揭示了这种动物死亡的情况。最有可能的是，鱿鱼在缺氧的底水中窒息而死，并与最后的猎物一起淹死（分心沉没）。