.... * Author for correspondence (e-mail: hoda@brh.co.jp ) 27 3 2007 © 2007. 2007 Chelicerate Arthropod Delta Notch Growth zone Caudal lobe Mesoderm Caudal ectoderm Segmentation Segments consisting of ectoderm and mesoderm are characteristic of arthropod embryos...

... formation of the spider embryo. ‡ Author for correspondence (e-mail: yasuko@brh.co.jp ) 16 1 2003 © 2003. 2003 Spider Chelicerate Embryogenesis Cumulus dpp /BMP2/BMP4 fork head /HNF3 otd/otx cad/cdx Mad/Smad Body axis formation Establishment of dorsoventral...

...: angelika.stollewerk@uni-koeln.de 30 8 2002 ©2002. 2002 Delta/Notch signalling Neurogenesis Lateral inhibition Chelicerate Cupiennius salei A decision between neural and epidermal fate takes place in the ventral neuroectoderm of Drosophila . At the beginning of neurogenesis, groups...

..., but the evolutionary origin of the mechanism, the pair-rule system, is unclear. We have examined the expression of the homologues of two Drosophila pair-rule genes, runt and paired (Pax Group III), in segmenting embryos of the two-spotted spider mite ( Tetranychus urticae Koch). Spider mites are chelicerates, a group...

... © 2001. 2001 Neurogenesis Proneural genes Invagination Mitosis Chelicerate Cupiennius salei The phylum arthropoda comprises four classes: myriapoda, crustacea, insecta and chelicerata. The monophyly or polyphyly of the arthropoda has been questioned, as has the relationship...