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Figure 11 | Frontiers in Zoology

Figure 11

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

Figure 11

Pillar-type trabecula in the thin distal part of the genital operculum after the fourth embryonic molt (stage 21). Limulus polyphemus. TEM. Hypodermal cells (C) from the opposed walls of the appendage extend processes that join in forming a complex connection (*). The lumen (L) has fine particulate material that is probably hemocyanin [30, 31]. Cu, cuticle. Scale, 2 μm.

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Frontiers in Zoology

ISSN: 1742-9994