Pachycormid fish fed on octobrachian cephalopods: new evidence from the ‘Schistes bitumineux’ (early Toarcian) of southern Luxembourg

IF 3 2区地球科学 Q1 PALEONTOLOGY

Swiss Journal of Palaeontology Pub Date : 2024-02-09 DOI:10.1186/s13358-023-00295-1

Robert Weis, Dominique Delsate, Christian Klug, Thodoris Argyriou, Dirk Fuchs

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Abstract

A re-examination of the early Toarcian fish fossils preserved in public paleontological collections in Luxembourg revealed 70 specimens of large Toarcian pachycormid fish with an excellent three-dimensional preservation within calcareous nodules. Six of them are associated with octobrachian coleoid gladii in their oesophagus or stomach, an association not previously described from Luxembourg. The pachycormids are ascribed to Pachycormus macropterus (Blainville, 1818) and Saurostomus esocinus Agassiz, 1843 while the octobrachian gladii are ascribed to Teudopsis bollensis Voltz, 1836, Teudopsis sp. indet. and Loligosepiidae indet. The position and orientation of the gladii provide direct evidence of these fishes feeding on coleoids and thus a teuthophagous diet, rather than an accidental joint burial. Together with evidence from coeval deposits in Germany, these findings suggest that teuthophagy was a widespread feeding strategy at the base of the clade that contains the suspension-feeding pachycormid giants of the Jurassic–Cretaceous.

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以八腕头足类为食的棘尾鱼：来自卢森堡南部 "Schistes bitumineux"（早期托尔克世）的新证据

对保存在卢森堡公共古生物藏品中的早期托阿克鱼化石进行的重新研究发现，有70件大型托阿克鱼类标本在钙质结核中三维保存完好。其中六件标本的食道或胃部与八腕类的鞘状角鲨有关联，这种关联以前从未在卢森堡描述过。棘皮动物被归类为 Pachycormus macropterus（Blainville，1818 年）和 Saurostomus esocinus Agassiz，1843 年，而八瓣膜角闪虫被归类为 Teudopsis bollensis Voltz，1836 年、Teudopsis sp.indet.和 Loligosepiidae indet.。角闪石的位置和方向提供了直接证据，证明这些鱼类以褐藻为食，因此是以褐藻为食，而不是偶然的合葬。这些发现与来自德国同时期沉积物的证据一起表明，在包含侏罗纪-白垩纪悬浮取食的棘皮动物巨类的支系底部，teuthophagy是一种普遍的取食策略。

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来源期刊

Swiss Journal of Palaeontology Earth and Planetary Sciences-Paleontology

CiteScore

4.30

自引率

16.70%

发文量

审稿时长

4 weeks

期刊介绍： The Swiss Journal of Palaeontology publishes original research and review articles of interest to the international community in the fields of palaeontology, taxonomy and systematics, while recognising at the same time the importance of documenting high-quality palaeontological data in a regional context. Palaeobiology in combination with alpha taxonomy is a core topic of the journal. Submitted papers should have an appeal as wide as possible, directed towards an international readership. Contributions should not have been simultaneously submitted elsewhere, and the overlap of content between related articles should be minimal. Duplications of text and the use of previously published illustrations without adequate citation are unacceptable. If a manuscript has two or more authors, both or all have to sign to confirm they all were involved in the work and have agreed to its submission. The preferred manuscript language is UK English, but consistently used US English is also acceptable. We encourage the publication of proceedings of international meetings as well as special thematic issues. Short contributions and book reviews are also accepted. An international editorial team as well as guest editors guarantee that the thematic issues as well as all articles in regular issues are peer-reviewed and meet the highest standards.