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Figure 13 | Frontiers in Zoology

Figure 13

From: Ultrastructure of book gill development in embryos and first instars of the horseshoe crab Limulus polyphemus L. (Chelicerata, Xiphosura)

Figure 13

Part of the cartilage-like endoskeleton in the thick proximal part of the genital operculum after the fourth embryonic molt (stage 21). Limulus polyphemus. TEM. Some cells (C) with nuclei have large vacuoles (Va), and cell debris (CD) is common. A thin, dense matrix (Ma) surounds each cell and the entire endoskeleton. Cu, external cuticle; H, hypodermal layer. Scale, 10 μm.

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Frontiers in Zoology

ISSN: 1742-9994