Pancrustacea
Also known as Pancrustaceans
thumb| Pancrustacea is the clade that comprises all crustaceans and all hexapods (insects and relatives). This grouping is contrary to the Atelocerata hypothesis, in which Hexapoda and Myriapoda are sister taxa, and Crustacea are only more distantly related. As of 2010, the Pancrustacea taxon was considered well accepted, with most studies recovering Hexapoda within Crustacea. The clade has also been called Tetraconata, referring to having a four-part cone in the ommatidium. The term "Tetraconata" is preferred by some scientists in order to avoid confusion with the use of "pan-" to indicate a
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13 sectionsContents
- Molecular studies
- Regier ''et al.'' (2005)
- Regier ''et al.'' (2010)
- von Reumont ''et al.'' (2012)
- Jondeung ''et al.'' (2012)
- Oakley ''et al.'' (2013)
- Rota-Stabelli ''et al.'' (2013)
- Schwentner ''et al.'' (2017)
- Lozano-Fernandez ''et al.'' (2019)
- Bernot ''et al.'' (2023)
- Position of Tantulocarida
- See also
- References
thumb| Pancrustacea is the clade that comprises all crustaceans and all hexapods (insects and relatives). This grouping is contrary to the Atelocerata hypothesis, in which Hexapoda and Myriapoda are sister taxa, and Crustacea are only more distantly related. As of 2010, the Pancrustacea taxon was considered well accepted, with most studies recovering Hexapoda within Crustacea. The clade has also been called Tetraconata, referring to having a four-part cone in the ommatidium. The term "Tetraconata" is preferred by some scientists in order to avoid confusion with the use of "pan-" to indicate a clade that includes a crown group and all of its stem group representatives.
==Molecular studies== A monophyletic Pancrustacea has been supported by several molecular studies, in most of which the subphylum Crustacea is paraphyletic with regard to hexapods (that is, that hexapods, including insects, are derived from crustacean ancestors). This means that within Pancrustacea, only some members are actually crustaceans, hexapods being the main exception.