To identify the taxonomic classification of an organism (fossil), its physical and chemical characteristics must be known.
Taxonomy is a science that is responsible for classifying or organizing knowledge based on different variables. In the case of the natural sciences, there are different taxonomies to classify organisms based on their physical and genetic characteristics.
To classify an organism (fossil) in a taxonomic category we must identify its main characteristics and select the taxonomic categories that correspond to those characteristics.
Note: This question is incomplete because some information is missing. However I can answer it based on my prior knowledge.
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