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Composition and ultrastructure of holocephalan granulocytes

1988; Taylor & Francis; Volume: 22; Issue: 1 Linguagem: Inglês

10.1080/00288330.1988.9516279

1175-8805

P. M. Hine, J. M. Wain,

Neurobiology and Insect Physiology Research

Abstract Ultrastructural observations on the lymphomyeloid tissue of 4 Rhinochimaera paci‐fica, 2 Harriotta raleighana, 4 Hydrolagus sp., and 4 Callorhynchus milii were correlated with blood granulocytes under the light microscope. Rhinochimaera only had fine eosinophilic granulocytes (FG) in blood and orbital tissue, but in Harriotta orbital tissue also contained coarse eosinophilic granulocytes similar to the eosinophils of higher vertebrates. Whereas FG of Harriotta contained homogeneous electron‐dense granules, those of Rhinochimaera contained whorl, plate‐like, and multivesiculate inclusions. Hydrolagus sp. and Callorhynchus also had a third granulocyte type that showed some similarities to the coarse granulocytes. They differed, however, in having granules containing a lucent core, apparently bounded by an ovoid vesicle‐like inclusion that may pass from the granule into the cytoplasm. In Hydrolagus these granules also contained tubular structures projecting from, or connecting, granules. Granulocyte interrelationships are discussed.