Uniramia

Group of arthropods Arthropoda Uniramia Onychophora Hexapoda Myriapoda Crustacea Chelicerata S. M. Manton's (1973) polyphyletic arthropod hypothesis with Uniramia as one of three subphyla. As members of Myriapoda, centipedes like this Scolopendra polymorpha are part of subphylum Uniramia Uniramia (uni – one, ramus – branch, i.e. single-branches) is formerly recognised group within Arthropoda, now recognised as non-monophyletic, united by their strictly uniramous (single branched) appendages. Onychophora like this Peripatoides sp. are no longer counted as unirames. Uniramia was one of three subphyla in the Arthropoda classification suggested by Sidnie Manton. This classification divided arthropods into a three-phyla polyphyletic group, with phylum Uniramia including the Hexapoda (insects), Myriapoda (centipedes and millipedes) and the Onychophora (velvetworms). The discovery of fossil lobopods, determined to be intermediate between onychophorans and arthropods led to the splintering of the Lobopoda and Onychophora into separate groups. The name Uniramia was temporarily rejected as a polyphyletic group, but was later redefined to only include Myriapoda and Hexapoda. This subphylu