Archidesmida

The Archidesmida is an extinct order of millipedes known from fossils from the Devonian period of Europe and North America. Archidesmidans have broad flat keels (paranota) extending from their body segments, and a modified pair of legs on the 8th segment that may have been involved in mating, similar to the gonopods of living millipedes which insert sperm into females. Alternately, the modified legs may have been used to grasp onto partners during mating.^[1][2]

Archidesmida Temporal range: Devonian PreꞒ Ꞓ O S D C P T J K Pg N
Archidesmus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Myriapoda
Class:	Diplopoda
Superorder:	†Archipolypoda
Order:	†Archidesmida Wilson & Anderson 2004
Families
Archidesmidae Zanclodesmidae