title: Ribautia lewisi sp. nov., a new centipede from Argentina with unusual tentorial process (Chilopoda: Geophilomorpha, Geophilidae).
abstract: Ribautia lewisi sp. nov. (Chilopoda: Geophilomorpha, Geophilidae) is herein described and illustrated after the holotype (male), paratypes (males and females), and additional non type specimens from Northeastern Argentina (Mesopotamian region). The new species is characterized by having a cluster of coxal organs in each coxopleuron of the ultimate leg-bearing segment and a claw-like pretarsus in the ultimate legs, bearing a very unusual feature, in that the internal limbs of tentorium have a conspicuous tooth-shaped sclerotized process directed inward. R. lewisi sp. nov. is only the second confirmed record of the genus Ribautia from Argentina, the other being R. jakulicai Pereira, 2007 from Northwestern region of the country (Yungas biogeographical province).
authors.affiliation: CONICET and Universidad Nacional de La Plata, Facultad de Ciencias Naturales y Museo (División Zoología Invertebrados), Paseo del Bosque s/n, (1900) La Plata, Buenos Aires, Argentina. lpereira@fcnym.unlp.edu.ar
authors.forename: Luis Alberto
authors.initials: LA
authors.lastname: Pereira
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001118:Argentina; D001181:Arthropods / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D049628:Body Size; D017753:Ecosystem; D005260:Female; D008297:Male; D009929:Organ Size