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Are Hox Genes Ancestrally Involved in Axial Patterning? Evidence from the Hydrozoan Clytia hemisphaerica (Cnidaria)
TLDR
The phylogenetic analyses do not support an origin of ParaHox and Hox genes by duplication of an ancestral ProtoHox cluster, and reveal a diversification of the cnidarian HOX9-14 genes into three groups called A, B, C.
Phylogenetic Analysis of Invertebrate Lysozymes and the Evolution of Lysozyme Function
TLDR
The genomic structure of the gene encoding the lysozyme of Mytilus edulis, the common mussel is determined and it is proposed that the origin of this domain can be traced back in evolution to theorigin of bilaterian animals.
Phylogenetic relationships of conifers inferred from partial 28S rRNA gene sequences.
TLDR
Cl cladistic analyses using a new data set obtained from 28S rRNA gene sequences strongly support the monophyly of conifers including Taxaceae and suggest that the common ancestor of these families, both having the greatest diversity in the Southern Hemisphere, inhabited Gondwanaland.
MADS-box genes in Ginkgo biloba and the evolution of the AGAMOUS family.
TLDR
A study of MADS-box genes in Ginkgo biloba, the unique extant representative of a whole branch of the phylogenetic tree of the seed plants, revealed that one of these genes, GBM5, is an orthologue of the AGAMOUS gene of A. thaliana.
New insights on ctenophore neural anatomy: immunofluorescence study in Pleurobrachia pileus (Müller, 1776).
TLDR
In this study, the neuro-anatomy of the ctenophore Pleurobrachia pileus was explored by whole-mount fluorescent antibody staining using antibodies against tyrosylated -tubulin, FMRFamide, and vasopressin, and the organization of the aboral neuro-sensory complex comprising the apical organ and polar fields is described.
Homology of arthropod anterior appendages revealed by Hox gene expression in a sea spider
TLDR
It is concluded that the protocerebral appendages have been lost in all extant arthropod groups, including the Euchelicerata and the Mandibulata.
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