Arthrosolaenomeridini Hoffman, 1976

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 : 211

Tribe Arthrosolaenomeridini Hoffman, 1976

Arthrosolaenomeridini Hoffman, 1976: 171–183 ; Hoffman, 1980: 151.

Diagnosis. Arthrosolaenomeridini males differ from others Chelodesminae males by the combination of the following characteristics: presence of a row of setae 2 + 2 at the apex of the head ( Fig. 29A ); presence of two pairs of ventral projections in the fifth sternite; presence of lateral macrosetae, in mesal aspect, on gonocoxae ( Figs 32E–F ); laminated telopodite with a cingulum on the lateral margin ( Figs 34A–C ); prefemoral process of the gonopod long and thin ( Figs 33B–E ).

Descriptive notes. Body length between 39−76 mm. Gonopod: composed of a basal portion (gonocoxae), containing lateral macrosetae; and a distal portion (telopod) divided into two well-developed narrow branches: the external branch (solenomere) presented as a single branch containing a variable-position cingulum and an evident spermatic groove, and the internal branch (prefemoral process) varying in size and format according to genera.

Distribution. The tribe is distributed in Brazil in the northern region (states of Pará and Tocantins), central-west region (states of Goiás, Mato Grosso and Mato Grosso do Sul) and southeast (state of São Paulo).

Composition. Arthrosolaenomeris Schubart, 1943 ; Gangugia Schubart, 1947 ; Angelodesmus Schubart, 1962 ; Abiliodesmus n. gen.; Folcloredesmus n. gen.

Figures

FIGURE 29. A) Arthrosolaenomeris pantanalensis Schubart, 1943, head (IBSP 530); B) Folcloredesmus thomasi n. sp., gnathochilarium (CZUFMT 833); C) Abiliodesmus planaltensis (Schubart, 1960) comb. nov. (IBSP 3570), gnathochilarium; D) Angelodesmus costalimai Schubart, 1962 (holotype, MZSP), detail of gnathochilarium. Scale bars: A, 1 mm.; B, 2 mm.; C, 1 mm.; D, 0,5 mm. Abbreviations: lp, lingual plate; m, mentum; st, stipes.

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 33. Gonopod. A) Eucampesmella lartiguei lartiguei (Silvestri, 1897) (MNRJ 11609); B) Angelodesmus costalimai Schubart, 1962(holotype, MZSP); C)Arthrosolaenomeris sacin. sp. (IBSP 1148); D) Abiliodesmusmapinguari n. sp.(CZUFMT 836); E) Gangugia simplex Schubart, 1958 (holotype, MZSP 1077); F) A. saci n. sp. (IBSP 1148). Scale bars: B–E) 1 mm.; A, F) 0,5 mm. Black bars refer to the degree of angulation of the prefemoral process. Abbreviations: Cx, gonocoxae; dl, dorso-basal lobe of the prefemoral process; Pf, prefemoral region; PfP, prefemoral process; S, solenomere.

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.