Mecaster fourneli (Deshayes, 1847) (Echinodermata: Echinoidea) from the Turonian (Late Cretaceous) of the Gabonese Coastal Basin: systematics and palaeobiogeographical implications

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Annales de Paleontologie Pub Date : 2025-07-01 DOI:10.1016/j.annpal.2025.102888

Urlain Gaël Yakouya-Moubamba , Thomas Saucède , Wilma Linda-Belle Mougola , Benjamin Musavu Moussavou

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Abstract

This study presents a detailed systematic analysis of the irregular echinoid Mecaster fourneli (Deshayes, 1847) from Turonian (Late Cretaceous) deposits of the Gabonese coastal basin. The morphological and biometric study of 26 well-preserved specimens has allowed a precise characterisation of this species, previously mentioned but never described or illustrated in this region. The specimens studied come from three different localities (Gabon Store, Pétro Gabon and Maison Georges Rawiri). Comparative morpho-biometric analysis with populations from Algeria and Peru reveals a remarkable morphological homogeneity despite the geographical distance. The presence of M. fourneli in the Gabonese coastal basin confirms the geographical expansion of this species during the Upper Cretaceous and strengthens the hypothesis of a palaeobiogeographical link between the Mediterranean and West African provinces during the Turonian-Coniacian, probably via a trans-Saharan passage during the major transgressive event of this period.

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加蓬海岸盆地晚白垩世Turonian的Mecaster fourneli (Deshayes, 1847)（棘皮科：棘皮总科）：系统分类学和古生物地理学意义

本文对加蓬海岸盆地晚白垩世Turonian（晚白垩世）沉积中的不规则针孔类Mecaster fourneli （Deshayes, 1847）进行了详细的系统分析。对26个保存完好的标本进行形态学和生物计量学研究，可以对该物种进行精确的表征，该物种以前曾提到过，但从未在该地区描述或说明过。研究的标本来自三个不同的地方（加蓬商店、p加蓬和Maison Georges Rawiri）。阿尔及利亚和秘鲁种群的形态-生物统计学比较分析显示，尽管地理距离较远，但形态同质性显著。M. fourneli在加蓬海岸盆地的存在证实了该物种在上白垩纪的地理扩张，并加强了在Turonian-Coniacian期间地中海和西非省之间存在古生物地理联系的假设，可能是通过该时期主要海侵事件中的跨撒哈拉通道。

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来源期刊

Annales de Paleontologie 地学-古生物学

CiteScore

1.70

自引率

10.00%

发文量

审稿时长

>12 weeks

期刊介绍： Créées par Marcellin Boule en 1905, les Annales de Paléontologie publient 4 numéros par an traitant des fossiles animaux et végétaux, dans tous les domaines de la paléontologie incluant : -La Paléoanatomie- La Paléohistologie- La Morphologie fonctionnelle- La Systématique- L''Évolution- La Paléoécologie ... et toute les contributions susceptibles d''améliorer la compréhension des organismes et des environnements éteints.