Pancrustacea

Taxobox | name = Pancrustacea
regnum = Animalia
phylum = Arthropoda
unranked_classis = Pancrustacea
unranked_classis_authority = Zrzavý & Štys, 1997
subdivision_ranks = Subphyla
subdivision = Crustacea Hexapoda

Pancrustacea is a proposed taxon, comprising all crustaceans and hexapods [cite journal | quotes=no|author = J. Zrzavý & P. Štys |title=The basic body plan of arthropods: insights from evolutionary morphology and developmental biology |journal=Journal of Evolutionary Biology |year=1997 |volume=10 |pages=353–367 |doi=10.1007/s000360050029] . This grouping is contrary to the Atelocerata hypothesis, in which Myriapoda and Hexapoda are sister taxa, and Crustacea are only more distantly related.

A monophyletic Pancrustacea has been supported by several molecular studies [cite journal | quotes=no|author=Jeffrey W. Shultz & Jerome C. Regier |title=Phylogenetic analysis of arthropods using two nuclear protein-encoding genes supports a crustacean + hexapod clade |journal=Proc. R. Soc. Lond. B |volume=267 |pages=1011–1019 |url=http://www.life.umd.edu/entm/shultzlab/opiliomd/papers/ProcRSocLondB.pdf |doi=10.1098/rspb.2000.1104 |year=2000] [cite journal | quotes=no |title=A review of arthropod phylogeny: new data based on ribosomal DNA sequences and direct character optimization |author=Gonzalo Giribet & Carles Ribera |journal=Cladistics |volume=16 |pages=204–231 |year=2000 |url=http://www.mcz.harvard.edu/Departments/InvertZoo/pdf_files/Giribet%2520%26%2520Ribera%25202000.pdf |doi=10.1111/j.1096-0031.2000.tb00353.x] [cite journal | quotes=no|author=Francesco Nardi, Giacomo Spinsanti, Jeffrey L. Boore, Antonio Carapelli, Romano Dallai & Francesco Frati |title=Hexapod origins: monophyletic or paraphyletic? |journal=Science |volume=299 |pages=1887–1889 |year=2003 |url=http://www.owlnet.rice.edu/~amdave/Porfolio/Framesetup/CrseListPrtflCntnt/CrseCntnt/bios2012/ARTParaphyHexa.pdf |doi=10.1126/science.1078607 |format=dead link|date=June 2008 – ^{[http://scholar.google.co.uk/scholar?hl=en&lr=&q=author%3A+intitle%3AHexapod+origins%3A+monophyletic+or+paraphyletic%3F&as_publication=%5B%5BScience+%28journal%29%7CScience%5D%5D&as_ylo=2003&as_yhi=2003&btnG=Search Scholar search]} ] , in most of which the subphylum Crustacea is paraphyletic with regard to insects (that is, that insects are derived from crustacean ancestors)

References