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A new stratigraphic occurrence of the taxon Pagetia (Trilobita) from the Spiti region and its biostratigraphic significance in correlation of the Wuliuan Stage (Miaolingian Series) in the Kashmir and the Spiti regions (Tethyan Himalaya), India
Abundant, though moderately well-preserved, specimens of Pagetia sp. are recorded along with the ptychopariid Xingrenaspisdardapurensis from a new stratigraphic level which lies above the Oryctocephalus salteri biozone in the Spiti region (Himalaya). This occurrence of Pagetia in a higher stratigrap...
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Published in: | Annales de paléontologie (1982) 2021-07, Vol.107 (3), p.102506, Article 102506 |
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Main Authors: | , , , , , , , , , |
Format: | Article |
Language: | English |
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Online Access: | Get full text |
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Summary: | Abundant, though moderately well-preserved, specimens of Pagetia sp. are recorded along with the ptychopariid Xingrenaspisdardapurensis from a new stratigraphic level which lies above the Oryctocephalus salteri biozone in the Spiti region (Himalaya). This occurrence of Pagetia in a higher stratigraphic level (higher than the Oryctocephalus salteri biozone) from the Spiti region helps in understanding the distribution of this taxon in the Cambrian of the Kashmir and Spiti regions of the Himalaya. A Pagetia-Xingrenaspis association from the Kashmir region is already known, the present discovery of a similar association in the Spiti region enables the Wuliuan (Miaolingian) biostratigraphic correlation between the Kashmir and the Spiti regions. The record of the taxon Pagetia from a higher stratigraphic level in the Spiti region contradicts the previous assumption that the Pagetia bearing level in Kashmir is equivalent to the Pagetia-Oryctocephalusindicus (O. indicus biozone, Hayden horizon 2) in the lowest part of the Wuliuan in the Spiti region.
Des spécimens abondants, bien que modérément bien conservés, de Pagetia sp. sont signalés avec le ptychopariide Xingrenaspisdardapurensis dans un nouveau niveau stratigraphique situé au-dessus de la biozone Oryctocephalussalteri dans la région de Spiti (Himalaya). Cette occurrence de Pagetia à un niveau stratigraphique supérieur de la région de Spiti aide à comprendre la distribution de ce taxon dans les régions du Cambrien du Cachemire et du Spiti de l’Himalaya. L’association Pagetia-Xingrenaspis de la région du Cachemire est déjà connue, la découverte actuelle d’association similaire dans le Spiti permet la corrélation biostratigraphique Wuliuan (Miaolingienne) entre les régions du Cachemire et de Spiti. L’enregistrement du taxon Pagetia dans un niveau stratigraphique plus élevé dans la région de Spiti contredit l’hypothèse précédente que le niveau à Pagetia au Cachemire est équivalent au Pagetia-Oryctocephalusindicus (O. indicus biozone, Hayden horizon 2) dans la partie la plus basse de la Wuliuan dans la région de Spiti. |
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ISSN: | 0753-3969 |
DOI: | 10.1016/j.annpal.2021.102506 |