Light‐ and Electronmicroscopic Observations on the Blood Cells of the Atlantic Hagfish, Myxine glutinosa (L.)

Abstract

In the blood of Myxine glutinosa three cell lines may be distinguished: erythro-

Composition and ultrastructure of holocephalan granulocytes

“…Ultrastructurally the other holocephalan granulocytes show few similarities with agnathans, elasmobranchs, or teleosts. The simple, small, uniformly electron-dense granules in all three species are similar to those of agnathans (Linthicum 1975;Ostberg et al 1976;Mattisson & Fange 1977) and the granules of type II cells in Scyliorhinus canicula reported by Morrow & Pulsford (1980). However, such simple lysosome-like granules are common in animal cells and are therefore of no phylogenetic significance.…”

“…The coarse granulocytes (CG) of Harriotta, Hydrolagus, and Callorhynchus resemble the eosinophilic cells of lampreys (Rowley & Page 1985), Etmopterus spinax (Mattisson & Fange 1982), Scyliorhinus canicula type I granulocytes (Morrow & Pulsford 1980), coarse granulocytes in Etmopterus baxteri and Pavoraja spinifera (Hine & Wain 1987a, 1987b) five other elasmobranchs (Honma et al 1984), the Australian lungfish (Hine et al in press), and some (Bielek 1980) but not all (Weinreb 1963) teleosts, and are identified as eosinophils. Callorhynchus eosinophils differ from those of other fishes, except the lungfish (Hine et al in press) in the differentiation of an electron-dense core from a granular externum.…”

“…Agnathans have granulocytes with dense rod-like granules (Linthicum 1975;Ostberg et al 1976;Mattisson & Fange 1977) and granules with crystalline rods (Kelenyi & Larsen 1976;Page & Rowley 1983) or large dense granules (Rowley & Page 1985), whereas elasmobranchs appear to have many granule types (Morrow & Pulsford 1980;Fange & Mattisson 1981;Mattisson & Fange 1982;Hyder et al 1983;Honma et al 1984) but teleost granules more closely resemble the neutrophils and eosinophils of higher vertebrates (Bielek 1980).…”

Hemopoiesis in the pronephros of tench, Tinca tinca, Linnaeus 1758(Teleostei, Cyprinidae): cytochemical identification and cell morphology

“…Hemopoietic tissue in hagfish is located in the intestinal submucosa and pronephros, where the intestinal submucosa is mainly granulopoietic while the pronephros is mainly lymphopoietic or granulopoietic (2). Hemopoietic specification of the genus Chimaera shows partial hemopoiesis in the cranial and clavicular region.…”

“…Hemopoietic specification of the genus Chimaera shows partial hemopoiesis in the cranial and clavicular region. Granulopoietic tissue of sturgeon is located in the posterior part of the meninx; a depression or canal in the posterior part of the cranium shows where extinct Devonian fish were producing blood cells (2).…”