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Figure 10 | Frontiers in Zoology

Figure 10

From: The role of ventral and preventral organs as attachment sites for segmental limb muscles in Onychophora

Figure 10

Sclerotized mouth structures in embryos of the neotropical Peripatidae. Light and scanning electron micrographs of flexed stage embryos of representatives of Peripatidae (posture stage according to Walker and Campiglia [33]). Anterior is up. (A) Head of an embryo of Principapillatus hitoyensis in ventral view. Note the scletotized plate posterior to the jaws, which corresponds in position with the preventral organ of the slime papilla segment that has migrated into the definitive mouth cavity. (B) Detailed view of the jaws and the sclerotized plate from the same embryo as in A. (C) Head of an embryo of Plicatoperipatus jamaicensis in ventral view. Arrowheads point to the posterior-most pair of developing lip papillae surrounding the mouth opening. Abbreviations: jw, presumptive jaws; pv, sclerotized plate (=preventral organ of the slime papilla segment); vo, ventral organ. Scale bars: 100 μm (A) and 50 μm (B, C).

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