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Ityphilus betschi sp. nov. from French Guiana, (Chilopoda: Geophilomorpha: Ballophilidae) is here described and illustrated on the basis of the male holotype and a non-type female specimen. The new species is characterized by having the internal edge of the forcipular tarsungulum partially serrate; ventral pore-fields present along the entire body length; and all pore-fields undivided. It is compared in detail with the other Neotropical members of the genus sharing these three combined traits, and having a roughly similar range of leg-bearing segments, i.e., I. crabilli Pereira, Minelli & Barbieri, 1994 (from Brazil); I. demoraisi Pereira, Minelli & Barbieri, 1995 (from Brazil); I. guianensis Chamberlin, 1921 (from Guyana, Brazil, Trinidad); I. perrieri (Brölemann, 1909) (from Brazil); and I. saucius Pereira, Foddai & Minelli, 2000 (from Brazil). Complementary notes for these latter species are also given. Undiluted 2-Phenoxyethanol (CAS No. 122-99-6) has been used as an effective clearing agent/mounting medium for the preparation of temporary mounts of all body parts of the examined specimens. The discovery of the new species here described represents the first record of the family Ballophilidae from French Guiana. Ityphilus betschi sp. nov. de Guayana Francesa, (Chilopoda: Geophilomorpha: Ballophilidae) se describe e ilustra sobre la base del holotipo macho y un ejemplar no tipo hembra. La nueva especie se caracteriza por tener el borde interno de la tarsungula forcipular parcialmente serrado; campos de poros ventrales presentes a lo largo de todo el cuerpo; y todos los campos de poros no divididos. Se compara en detalle con los demás miembros neotropicales del género que comparten estos tres caracteres combinados y que tienen un rango aproximadamente similar de segmentos pedales, i.e., I. crabilli Pereira, Minelli & Barbieri, 1994 (de Brasil); I. demoraisi Pereira, Minelli & Barbieri, 1995 (de Brasil); I. guianensis Chamberlin, 1921 (de Guyana, Brasil, Trinidad); I. perrieri (Brölemann, 1909) (de Brasil); e I. saucius Pereira, Foddai & Minelli, 2000 (de Brasil). Notas complementarias para estas últimas especies también son brindadas. Se ha utilizado 2-Phenoxyethanol (CAS No. 122-99-6) no diluido, como un efectivo diafanizante (y a la vez medio de montaje) para la realización de preparaciones microscópicas trasitorias de todas las partes del cuerpo de los especimenes examinados. El hallazgo de la nueva especie aquí descripta representa el primer registro de la familia Ballophilidae para Guayana Francesa

First record of a ballophilid centipede from French Guiana with a description of Ityphilus betschi sp. nov. (Myriapoda: Chilopoda: Geophilomorpha)