... a macroevolutionary perspective, our data support the serial homology of lepidopteran scales with dipteran sensory bristles. However, it is unclear whether these would represent a case of orthology, because scales may have instead evolved from a non-sensory serial homologue that pre-existed in a common ancestor, akin...

... arches, where cartilaginous appendages called branchial rays, which support the respiratory lamellae of the gills, are patterned by a shh -expressing gill arch epithelial ridge. Together with similar discoveries in zebrafish, our findings support serial homology of the pseudobranch and gills...

... performed additional genetic experiments to identify Ubx-regulated genes that would be most amenable to molecular analysis. *Author for correspondence (e-mail: [email protected] ) 11 4 2002 © 2002. 2002 Serial homology Ultrabithorax Hox protein Appendages evolution...

... models, which underscore the roles of gene duplication and regulatory ‘tinkering’, provide a conceptual framework for elucidating the evolution of serially homologous structures in general, and thus contribute to the burgeoning field seeking to uncover the genetic and developmental bases of evolution...

... of sensory neurons differentiate in a stereotyped spatiotemporal pattern in dorsal, lateral and ventral clusters in each segment and project their axons onto these nerves. Although segmentspecific differences exist, serial homologs of the developing nerves and sensory neurons can be identified. A comparison...