Prashant P. Sharma
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  • Research
    • Phylogenomics >
      • Chelicerate phylogenomics
      • Scorpion phylogenomics
      • Sea spider phylogenomics
    • Evo-devo >
      • Harvestman Hox genes
      • Scorpion Hox genes
      • Evolution of the chelicera
      • RNAi in Phalangium opilio
      • Deutocerebral appendages
    • Genomics
    • Biodiversity discovery
    • Older (archived) projects >
      • Systematics >
        • Arthropod systematics >
          • Cyphophthalmi
          • Zalmoxidae
          • Basal Opiliones phylogeny
        • Laniatores
        • Bivalve systematics >
          • Basal bivalve phylogeny
          • Protobranch phylogeny
      • Biogeography >
        • Sandokanidae
        • Zalmoxoidea
        • Simulations and theory
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    • Emily V.W. Setton
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    • Australia 2014
    • Philippines 2014
    • Laos 2014
    • Australia 2015
    • Colorado 2018
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Hox genes of Opiliones
We used gene expression protocols to profile expression domains of the ten Hox genes in the harvestman, in order to compare their development with that of mites and spiders. The complete suite of expression domains in the harvestman is as shown.
Picture
Sharma et al. (2012) Evol. Dev. 14: 450-463.
These data suggest that morphological diversity of the opisthosoma (the posterior tagma of chelicerates) is patterned by the posterior-most pair of Hox genes, abd-A and Abd-B. Known expression domains of these genes (principally for the spider) are shown. Note the greater differentiation of the anterior opisthosoma in the spider compared to that of the harvestman.
Picture
Sharma et al. (2012) Evol. Dev. 14: 450-463.
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