Folcloredesmus, Bouzan & Iniesta & Brescovit, 2021

Bouzan, Rodrigo Salvador, Iniesta, Luiz Felipe M. & Brescovit, Antonio Domingos, 2021, Cladistic analysis and taxonomic review of the millipede tribe Arthrosolaenomeridini Hoffman, 1976 (Polydesmida: Chelodesmidae), Zootaxa 4970 (2), pp. 201-256 : 244-246

Folcloredesmus n. gen.

urn:lsid:zoobank.org:act:DF201399-575A-4A47-8A79-A51DAFBEC925

Type species. Folcloredesmus thomasi n. sp.

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.

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.

Figures

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.

FIGURE 28. Distribution map of Angelodesmus Schubart, 1962 and Folcloredesmus n. gen. species.

FIGURE 30. Sternites, ventral projections. A) Arthrosolaenomeris pantanalensis Schubart, 1943 (IBSP 530), 6th body ring; B) Dioplosternus salvatrix Hoffman, 2005 (IBSP 1084), 6th body ring; C) Arthrosolaenomeris saci n. sp. (IBSP 1148), 7th body ring; D) Folcloredesmus thomasi n. sp. (CZUFMT 833), 9th body ring; E) A. saci n. sp., 9th body ring; F) Abiliodesmus planaltensis (Schubart, 1960) comb. nov. (IBSP 3570), 9th body ring. Scale bars: A–C, 1 mm.; D, 0,5 mm.; E, 0,3 mm.; F, 0,3 mm.

FIGURE 31. Legs. A) Arthrosolaenomeris pantanalensis Schubart, 1943 (IBSP 530); B) Gangugia boto n. sp. (holotype, IBSP 7539); C–D) Abiliodesmus planaltensis (Schubart, 1960) comb. nov. (IBSP 3570); E–F) Gangugia tapirapensis Schubart, 1947 (MNRJ 12008). Scale bars: A) 2 mm.; B) 1 mm.; C) 1 mm.; D) 1 mm.; E) 500 µm.; F)1 mm. Abbreviations: co, coxae; f, femur; prf, prefemur; pst, postfemur; t, tarsus; tb, tibia; tc; tarsal claw.

FIGURE 32. Gonocoxae.A) Arthrosolaenomeris pantanalensis Schubart, 1943 (IBSP 530); B) Gangugia tapirapensis Schubart, 1947 (MNRJ 12008); C) Folcloredesmus thomasi n. sp. (CZUFMT 833); D) A. pantanalensis Schubart, 1943 (IBSP 530); E) F. thomasi n. sp. (CZUFMT 833); F) Abiliodesmus mapinguari n. sp. (CZUFMT 836). Scale bars: A–B, D–F) 1 mm.; C) 0,2 mm. Abbreviations: Cx, gonocoxae; RE, rounded extension; SP, spiniform process.

FIGURE 34. Gonopod. (A–C) Ectal view. A) Abiliodesmus mapinguari n. sp. (CZUFMT 836); B) Folcloredesmus thomasi n. sp. (CZUFMT 833); C) Arthrosolaenomeris saci n. sp. (IBSP 1148). (D–F) Ventral view. D) Arthrosolaenomeris saci n. sp. (IBSP 1148); E) Gangugia cuca n. sp. (holotype, IBSP 7600); F) Chondrodesmus sp. (IBSP 3823). Scale bars: A–D) 1 mm.; E) 0,5 mm.; F) 0,3 mm. Arrows refer to cingulum. Abbreviations: PfP, prefemoral process; S, solenomere.