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Fig. 16 | EvoDevo

Fig. 16

From: Expression of NK cluster genes in the onychophoran Euperipatoides rowelli: implications for the evolution of NK family genes in nephrozoans

Fig. 16

Comparison of the expression of mediolateral patterning genes in onychophorans, arthropods, annelids and vertebrates. A Schematic drawing of the ventral ectoderm and nerve cords of a late stage embryo of E. rowelli showing expression of Msxpax3/7, pax6, NK6 and NK2.2. Bars below show the mediolateral extent of each domain in the ventral ectoderm and nerve cords in early and late developmental stages. Note that the ectodermal expression is interrupted by the ventral extra-embryonic tissue. Empty bars with red crosses indicate the presumed absence of expression in the nerve cord and ventral ectoderm. Asterisks indicate expression data described in Refs [11, 68, 107]. B Expression of Msx, pax3/7pax6, NK6 and NK2.2 in the neuroectoderm of the fruit fly Drosophila melanogaster, the annelid Platynereis dumerilii and the vertebrate Xenopus laevis. Abbreviations: ec, ventral ectoderm; nc, nerve cord; ve, ventral extra-embryonic tissue. Diagrams in B modified from Ref. [106]. See also Additional file 4 for a comparison of Msx, pax6, NK6 and NK2.2 domains in E. rowelli

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