Cladistic analysis and taxonomic review of the millipede tribe Arthrosolaenomeridini Hoffman, 1976 (Polydesmida: Chelodesmidae) Author Bouzan, Rodrigo Salvador Pós-graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brasil. Author Iniesta, Luiz Felipe M. 0000-0002-0529-4162 Pós-graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brasil. & luiz-moretti @ hotmail. com; https: // orcid. org / 0000 - 0002 - 0529 - 4162 luiz-moretti@hotmail.com Author Brescovit, Antonio Domingos 0000-0002-1511-5324 antonio. brescovit @ butantan. gov. br; https: // orcid. org / 0000 - 0002 - 1511 - 5324 antonio.brescovit@butantan.gov.br text Zootaxa 2021 2021-05-14 4970 2 201 256 journal article 6318 10.11646/zootaxa.4970.2.1 89d3c795-198b-4162-8903-9c6cf3f1e665 1175-5326 4761544 6DBA0C02-9E52-4FD0-8B48-8C7B405713A8 Folcloredesmus n. gen. urn:lsid:zoobank.org:act: DF201399-575A-4A47-8A79-A51DAFBEC925 Type species. Folcloredesmus thomasi n. sp. FIGURE 26. Folcloredesmus thomasi n. sp. (holotype, IBSP 5452), dorsal views of anterior (A), midbody (B) and posterior (C) body rings. Scale bars: 2 mm. Left gonopod. (D), mesal view; (E), ventral view; (F), ectal view. Scale bars: 1 mm. Abbreviations: C, cingulum; PfP, prefemoral process; S, solenomere. Diagnosis. Males of Folcloredesmus n. gen. differ from those of other Arthrosolaenomeridini genera by the combination of the following characters: paranota sub-triangular ( Fig. 26B ); slight dorsal lobe on leg prefemur; presence of a spiniform process in gonocoxae ( Figs 26D , 32C ). Description. General characters : Coloration (specimen long preserved in 70% ethanol) ocher with the paranota tip slightly whitish. Gnathochilarium: lingual plate covered by several setae; mentum only centrally covered by setae, with smooth edges and stipes completely covered by sparse setae. Body rings: cuticle slightly rough; alignment of paranota in posterior view straight. Sternite of the fourth segment with a pair of projections, sternite of the fifth segment with two pairs of projections covered with setae and sternite of sixth body ring with two pairs of ventral projections; seventh body ring with a pair of projections and post-gonopodal sternites with two pairs of rounded ventral projections ( Fig. 30D ). Paranota form: sub-triangular ( Fig. 26B ). Legs: slight dorsal lobe, a ventroapical projection in the prefemur of the anterior legs ( Fig. 31E ), and presence of granules in the tibia and tarsus; thin setae on the ventral part of the podomeres in the anterior legs ( Fig. 31F ). Male characters : Gonopod aperture on seventh body ring with the posterior margin excavated, concave and transverse sulci; without projections. Gonopods: gonocoxae equivalent to about half the length of the telopodite, cylindrical, with a spiniform process ( Fig. 26D ). Prefemoral process: elongate and thin ( Fig. 26D ) and with indentations in the apical portion, in ectal view ( Fig. 34B ). Cingulum in medial position ( Fig. 26F ). Solenomere also long and thin with apex slightly curved ( Figs 26D–F ). Female characters : Vulvae: oval-shaped, sub-triangular in lateral view. FIGURE 27. Left vulva. Abiliodesmus mapinguari n. sp. (paratype, CZUFMT 834): (A), ventral view; (B), lateral view. Folcloredesmus thomasi n. sp. (paratype, IBSP 5453): (C), ventral view; (D), lateral view. Scale bars: 0,5 mm. Abbreviations: EV, external valve; IV, internal valve; Op, operculum. Distribution. State of Mato Grosso ( Fig. 28 ). Etymology. The genus name comes from the Portuguese word for “Folclore” (culture shared by a particular group of people, as the tales characters used as species epithet in this paper) with the combining stem “-desmus”, commonly used in generic names in Polydesmida . Composition. One species: Folcloredesmus thomasi n. sp.