A new genus, Tupadesmus (Polydesmida, Chelodesmidae), and a new species, T.
muyrakyta (type species for the genus) are herein described from the Amazon rainforest
of northern Brazil. Tupadesmus pugiunculus (Schubart, 1946), new combination,
is placed in the new genus. We compared the new genus with other Chelodesminae
taxa, in particular with Eucampesmella, Brachyurodesmus and Arthrosolaenomeridini.
Males of the genus Tupadesmus differ from those of other Chelodesmidae genera
by the presence of well-defined striations surrounding incisura lateralis and by the
gonopodal prefemoral process divided into two thin, elongate, subequal and acuminate
branches. An updated checklist of the Chelodesmidae of Pará State, Brazil, is also
provided.
