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Figure 6 | BMC Developmental Biology

Figure 6

From: External and internal shell formation in the ramshorn snail Marisa cornuarietisare extremes in a continuum of gradual variation in development

Figure 6

Histological sections of M. cornuarietis embryos. Asterisks indicate corresponding structures; A: Sagittal section of a cephalopodium of a control snail, 12 days after oviposition, left lateral view; B: Sagittal section of a platinum-plus-heat-exposed snail, 12 days after oviposition, right lateral view; C: Sagittal section of a platinum-plus-heat-exposed snail, 17 days after oviposition, right lateral view; D: Horizontal section of a platinum-plus-heat-exposed snail, 17 days after oviposition; E: same individuum as in D, section more dorsal; F: Sagittal section of a platinum-plus-heat-exposed snail, 12 days after oviposition; CML: columellar muscle; CN: ctenidium; DG: digestive gland; E: eye; F: foot; H: head; MTC: mantle cavity; MTE: mantle edge; MTG: mantle gap; O: odontophor; SHG: shell gland.

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