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Figure 6 | EvoDevo

Figure 6

From: Cleavage pattern and fate map of the mesentoblast, 4d, in the gastropod Crepidula: a hallmark of spiralian development

Figure 6

Cell lineage diagram showing the fates of the first five progeny of 4d’s symmetrical ML and MR teloblasts. The progeny of the left and right teloblasts ML and MR are equivalent, so only the progeny of MR are illustrated here. A timeline of each set of divisions is also included at the bottom of the illustration. The green dashed line follows the teloblast signified by capital letters (M). Nomenclature follows the convention described in the text and shown in Figure 1 (see also [22]). Fates are color-coded according to their respective germ layers, as indicated in the key. A color-coded diagram is also included showing one representative stage reached when 16 cells are contained within the 4d lineage (stage depicted in Figure 1I). Also included on the fate map are colored lines showing the duration of expression of IoVasa mRNA and IoNanos protein as this is detected within specific progeny of 4d, as determined for the closely related caeneogastropod, Ilyanassa obsoleta (from [21, 51]). In addition, a timeline for expression of green fluorescent protein-tagged beta-catenin in C. fornicata is shown (from [22]). *demarks 3ML/R teloblasts, which Swartz et al. [51] previously suggested as the progenitors of the germ cells (see also Woods [52, 53] for Sphaerium).

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