One of the primary immunological organs of the adult lamprey is the supraneural body. This structure lies dorsal to spinal column and becomes heavily populated with lymphocytes following after immune challenge. [ ]

Synonyms: pro-vertebral arch dorsal fat body

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taxon notes

The supraneural body from hematopoietically stimulated lampreys appears to be histologically-similar to 'bone marrow' in higher vertebrates and contains all blood cell lineages and their precursors, including lymphocytes at all stages of maturity

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