PREDATORS AND PREYS: A CASE HISTORY FOR SAURICHTHYS (COSTASAURICHTHYS) COSTASQUAMOSUS RIEPPEL, 1985 FROM THE LADINIAN OF LOMBARDY (ITALY)
PREDATORS AND PREYS: A CASE HISTORY FOR SAURICHTHYS (COSTASAURICHTHYS) COSTASQUAMOSUS RIEPPEL, 1985 FROM THE LADINIAN OF LOMBARDY (ITALY)
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DOI：
10.13130/2039-4942/11442
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发表时间：
2019
影响因子：
2.3
通讯作者：
A. Tintori
中科院分区：
文献类型：
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作者：
A. Tintori
本文描述了一个产于北方Grigna山拉丁阶下游的肋鳞蛇鱼（Saurichthys costasquamosus）大型标本。这是一个不完整的标本，缺乏尾部区域，并显示肠道内容物。后者包括完全分散的遗骸，至少有两个成年Ctenognathichys bellottii的标本，一种中等大小的鱼在这个化石组合中很常见。蜥鱼一直被认为是一种活跃的捕食小鱼的动物，但这件标本的情况并非如此，肠道中的遗骸完全脱节，均匀地分布在沿着腹部。清除浮动尸体的建议，该假设也支持共同保存的Ctenognathichys不完整的个人。虽然蜥鱼属的标本显示了一些“原位”的关节分离，但在产生鱼的前部的板上，尾部区域的元素完全缺失。至于同一地点的其他大型蜥鱼类标本，据推测这是一种更大的海洋生物（可能是鱼龙）捕食的结果。
A large specimen of Saurichthys (Costasaurichthys) costasquamosus from the lower Ladinian of the Northern Grigna mountain is described. It is an incomplete specimen, lacking the caudal region, and showing gut content. This latter consists of totally scattered remains of at least two specimens of adult Ctenognathichthys bellottii , a medium size fish quite common in this fossil assemblage. Saurichthys has been always considered an active predator on small fishes, but it cannot be the case for this specimen, with remains in the gut are totally disarticulated and evenly scattered all along the abdomen. Scavenging on floating carcasses is proposed, the hypothesis being also supported by the common preservation of Ctenognathichthys as incomplete individuals. Although the Saurichthys specimen shows some ‘in situ’ disarticulation, caudal region elements are totally missing on the slab yielding the anterior part of the fish. As for other large Saurichthys specimens from the same site, it is supposed that this is the result of a predation by a much larger marine organism, possibly an ichthyosaur.