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Figure 4 | BMC Developmental Biology

Figure 4

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

Figure 4

SEM-images of M. cornuarietis embryos from the same clutch (A-E) exposed to platinum and elevated temperature at different stages of development. A: seven-day-old embryo resembling a stage of development present also in “sluggish” individuals as described in Marschner et al. [3], right lateral view; B: eight-day-old embryo, right lateral view; C: nine-day-old embryo, right lateral view; D: ten-day-old embryo, left lateral view; E: eleven-day-old embryo, right lateral view; F: nine-day-old embryo from a different clutch, left lateral view; CN: ctenidium; F: foot; H: head; MTE: mantle edge; OP: operculum; SH: shell; TN: tentacles; VS: visceral sac.

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BMC Developmental Biology

ISSN: 1471-213X

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