Oryctocephalus salteri biozone (Wuliuan, Miaolingian) in the Sumna Valley, Spiti, Himalaya

IF 0.7 4区地球科学 Q4 PALEONTOLOGY Annales de Paleontologie Pub Date : 2025-01-01 Epub Date: 2024-12-07 DOI:10.1016/j.annpal.2024.102749

Garry Singla , Birendra P. Singh , Om Narain Bhargava , Ramanpreet Kaur , Vishal Verma

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Abstract

We precisely demarcate the Oryctocephalus salteri biozone in the Cambrian Parahio Member (Kunzam La Formation) well exposed on the southwest-facing slope above the right bank of the Sumna River, Spiti. The FAD and LAD of O. salteri are located at 46.5 m and 60.8 m respectively, indicating a 14.3 m local stratigraphic range of the taxon along the section in Sumna Valley, Spiti. The O. salteri biozone is demarcated with a precise stratigraphic range of the eponymous species. This biozone contains trilobites O. salteri, Kunmingaspis stracheyi, Poriagraulos sp., Ziboaspis hostilis, Hundwarella memor, and Xingrenaspis hoboi. Based on the presence of the key taxon Hundwarella, the O. salteri biozone of the Kunzam La Formation (Spiti) is correlated with the Tonkinella-Hundwarella bearing level in the Nutunus Formation, Kashmir region.

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喜马拉雅斯皮提苏姆纳山谷的萨尔氏稻头菌生物带（苗岭五流）

在斯皮提苏姆纳河右岸西南向斜坡上，对寒武系Parahio段（Kunzam La组）的orytocephalus salteri生物带进行了精确的划分。salteri的FAD和LAD分别位于46.5 m和60.8 m，表明该分类群在Spiti Sumna Valley剖面上的局部地层范围为14.3 m。用同名物种的精确地层范围划分了O. salteri生物带。该生物带主要有三叶虫O. salteri、Kunmingaspis stracheyi、Poriagraulos sp.、Ziboaspis hostiis、hundwarela memoror和Xingrenaspis hoboi。基于关键分类群hundwarela的存在，将Kunzam La组（Spiti） O. salteri生物带与Nutunus组tonkinella - hundwarela的含盐水平进行了对比。

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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.