Mauriès J.-P.1, Golovatch S.I.2, Geoffroy J.-J.3 2010. Un nouveau genre et une nouvelle espèce de l’ordre Stemmiulida du Viet-Nam (Diplopoda) // Arthropoda Selecta. Vol.19. No.2: 73–80 [in French, with English summary].
1 Muséum national d’Histoire naturelle, Département Systématique et Evolution, UMR7205, Case postale 53, 61, rue Buffon, F-75231 Paris, France.
2 Institute for Problems of Ecology and Evolution, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071 Russia.
3 Muséum national d’Histoire naturelle, Département Ecologie et Gestion de la Biodiversité, UMR 7179 du CNRS, Equipe EVOLTRAIT, 4, Avenue du Petit Château, F-91800 Brunoy, France.
KEY WORDS: Stemmiulida, taxonomy, new genus, new species, key, Vietnam.
ABSTRACT. A new, anophthalmous and unpigmented troglophile, Eostemmiulus caecus sp.n., is described from Vietnam. Despite lacking the usual ocelli and primary oblique striations, it clearly belongs to the Stemmiulida, as based on other somatic characters (presence of spinnerets on the telson, laterally compressed segments, and alternating sternal structures) and thus represents the first record of this order from Indochina. In its habitus, the new species resembles Stemmiulus deharvengi Mauriès et Golovatch, 2007, described from Halmahera, Indonesia, but it clearly differs from that species and all others (about 150 taxa worldwide) in the male sexual characters (gonopods, paragonopods, first pairs of legs), as well as by the structure of the gnathochilarium (identical to that of the Chordeumatida) and the surprising position and shape of the spinnerets on the telson. A new genus, Eostemmiulus gen.n., is therefore proposed to accommodate the new species. As its name suggests, the authors consider that this genus occupies a position close to the base of the phylogeny of Stemmiulida, based on male sexual characters, particularly the conformation of the gonopods and paragonopods.