What is the catalog designation for the holotype specimen of Xiaotingia zhengi used by scientists?
Answer
IVPP V11339
The primary evidence and foundation upon which most scientific understanding of Xiaotingia is built stems from its holotype specimen, which carries the specific catalog designation IVPP V11339. This designation is essential for referencing the exact fossil material used in anatomical assessments, measurements, and phylogenetic interpretations of the genus. The integrity of the scientific discussion surrounding Xiaotingia rests heavily on the detailed study of this particular, nearly complete individual specimen.

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