Diverse Lophoctenium burrows from the Upper Devonian (Famennian V and VI) of Algeria

IF 1.2 4区地球科学 Q2 Earth and Planetary Sciences Proceedings of the Geologists Association Pub Date : 2024-02-01 DOI:10.1016/j.pgeola.2023.12.001

Olev Vinn , Mohamed Bendella , Mansour Zaagane , Abdelmalik Draoui , Radouane Sadji , Ommar Mouzti

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Abstract

Three ichnospecies of Lophoctenium (L. comosum, L. richteri and L. cf. haudimmineri) are reported from the Upper Devonian Argiles de Marhouma Formation (southwestern Algeria) for the first time. This formation contains a diverse assemblage of trace fossils belonging to the Nereites ichnofacies. We describe three ichnospecies of Lophoctenium that correspond to three different feeding strategies among the diverse ichnofauna of the Argiles de Marhouma Formation. The strategy of L. comosum evidences food-rich sediments as it maximises the amount of collected food per foraged distance. The strategy of L. richteri is probably most efficient for feeding in slightly less nutrient rich sediment, but gives the opportunity to discover more prolific feeding sites by moving on longer distances. The strategy with a straight central burrow and probes on both sides of the main burrow with long interspaces (L. cf. haudimmineri) was presumably used in the least food rich sediment. It seems that the Lophoctenium was widespread in the Devonian, but restricted to seas surrounding Gondwana.

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阿尔及利亚上泥盆纪（法门五世和六世）的多种 Lophoctenium 洞穴

首次报道了上泥盆世阿尔吉尔斯-德-马尔胡马地层（阿尔及利亚西南部）中的三种 Lophoctenium（L. comosum、L. richteri 和 L. cf. haudimmineri）。该地层包含属于 Nereites ichnofacies 的多种痕量化石。我们描述了与 Argiles de Marhouma Formation 多样化的蛭石动物群的三种不同取食策略相对应的三种 Lophoctenium ichnospecies。L. comosum的捕食策略证明了食物丰富的沉积物，因为它能在每段觅食距离上最大限度地收集食物。L. richteri的觅食策略可能是在营养稍差的沉积物中最有效的觅食策略，但它可以通过更长距离的移动来发现更多的觅食地点。中央洞穴笔直、主洞穴两侧有探头且间距较长的策略（L. cf. haudimmineri）可能用于食物最不丰富的沉积物。看来，Lophoctenium 在泥盆纪分布广泛，但仅限于冈瓦纳周围的海域。

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来源期刊

Proceedings of the Geologists Association 地学-地质学

CiteScore

2.70

自引率

8.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The Proceedings of the Geologists'' Association is an international geoscience journal that was founded in 1859 and publishes research and review papers on all aspects of Earth Science. In particular, papers will focus on the geology of northwestern Europe and the Mediterranean, including both the onshore and offshore record. Following a long tradition, the PGA will focus on: i) a range of article types (see below) on topics of wide relevance to Earth Sciences ii) papers on aspects of Earth Science that have societal relevance including geoconservation and Earth management, iii) papers on palaeoenvironments and palaeontology of the Mesozoic and Cenozoic, iv) papers on aspects of Quaternary geology and climate change, and v) papers on the history of geology with particular reference to individuals that have shaped the subject. These topics will also steer the content of the themes of the Special Issues that are published in the PGA.