a1 Department of Earth Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
a2 Department of Biology, Hampden-Sydney College, Hampden-Sydney, Virginia 23943, U.S.A.
Microdecemplex rolfei, gen. and sp. nov., a new microarthropleuridean less than 5 mm long, is described from the Middle Devonian Panther Mountain Formation of New York State, U.S.A. The specimens consist of organically preserved cuticle, with some preserving the only cephalic structures known for arthropleurideans. A new order, Microdecemplicida, and a new family, Microdecemplicidae, are established. The probable phylogenetic position of the Microdecemplicida as one of the basal clades of Diplopoda is proposed.
(Received January 05 2000)
(Accepted June 02 2000)
p1 Current address: Department of Entomology, University of Maryland, College Park, Maryland 20742, U.S.A.