Platydesmida
Guides
Andrognathus
Andrognathus is a genus of small, thin-bodied millipedes in the order Platydesmida, family Andrognathidae. The genus contains three extant species—A. corticarius, A. grubbsi, and A. hoffmani—distributed in deciduous forests of eastern North America, New Mexico, and Mexico respectively. A fossil species, A. burmiticus, is known from 99-million-year-old Burmese amber, indicating a formerly broader distribution. These millipedes are euanamorphic, adding segments throughout their lifespan, and exhibit paternal care behaviors.
Brachycybe petasata
Brachycybe petasata is a small millipede in the order Platydesmida, endemic to the southern Appalachian Mountains of the southeastern United States. It inhabits moist forest floor habitats, particularly leaf litter and decaying wood in beech, birch, maple, and hemlock forests. The species is distinguished by its production of four unique monoterpene alkaloids as chemical defenses: gosodesmine, hydrogosodesmine, homogosodesmine, and hydrohomogosodesmine. As a member of the subterclass Colobognatha, it represents one of the few millipede lineages known to synthesize terpenoid alkaloids.
Ischnocybe plicata
Ischnocybe plicata is a species of millipede in the family Andrognathidae, order Platydesmida. It was described by Cook & Loomis in 1928. The species belongs to the suborder Colobognatha, a group characterized by reduced mouthparts and simplified body structures. Like other platydesmidans, it likely inhabits moist forest environments and feeds on decaying organic matter.