Abiliodesmus planaltensis ( Schubart, 1960 ) 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 : 236-238

Abiliodesmus planaltensis ( Schubart, 1960) new combination

Figures 20 , 24E–F , 25

Arthrosolaenomeris planaltensis Schubart, 1960: 453 , figs 1−2. Male holotype from Jaci (20°52’56”S, 49°34’11”W), Mirassol, São Paulo, Brazil, 11.I.1950, O. Schubart coll., deposited in MZSP 1086 , examined.

Angelodesmus planaltensis :-- Hoffman, 1976: 176.

Additional material. BRAZIL: São Paulo: Monte Aprazível (20°46’21”S, 49°42’51”W), Fazenda São José do Varjão , 3♀ and one juvenile, 09.I.1950, O. Schubart coll. ( MZSP 1084 ) ; Ribeirão Preto (21°10’39”S, 47°48’37”W), Mata Santa Tereza , 3♂ and 1♀, 06–11.I.2006, I. Cizauskas coll. ( IBSP 3569 ) ; 4♂ and 1♀, 06–11.I.2006, I. Cizauskas coll. ( IBSP 3570 ) .

Diagnosis. Adult males differ from all other species of the genus by the presence of a narrow lateral expansion in the solenomere ( Figs 20D–F ).

Description. Male (Holotype, MZSP 1086). Coloration (long-preserved in 70% ethanol): Head and antennae ochre. Body ocher with the edges of the paranota whitish ( Figs 20A–C ). Legs ochre. Telson ocher. Total length: 50.84. Total width: 7.48. Collum, length 1.87, width 6.68. Antennomere lengths (1>7): 0.61; 1.67; 1.30; 1.12; 1.37; 1.30; 0.38. Podomeres lengths (1>7): 0.70; 0.94; 2.20; 0.97; 1.12; 1.55; 0.43. Gonopod aperture, length 1.29, width 2.34. Telson, length 0.81. Gonopod: length 2.71, width 2.11. Gonocoxae: length 0.84, width 0.98. Telopodite: length 2.56, width 1.12. Prefemoral process long (slightly larger than the solenomere) and narrow ( Fig. 20D ). Solenomere long ( Fig. 20F ), presence of a lateral membranous expansion ( Figs 20E–F ). Cingulum situated basally ( Fig. 20F ). Apex of the solenomere acuminate and ascending ( Fig. 20D ).

Female (IBSP 3569). Body as in male. Total length: 54.76. Total width: 8.18. Antennomere lengths (1>7): 0.49; 1.69; 1.38; 1.46; 1.34; 1.11; 0.30. Podomeres lengths (1>7): 0.82; 0.99; 2.18; 0.78; 1.02; 1.43; 0.59. Telson, length 1.72. Epigyne rounded with regular edges. Vulvae ( Fig. 24E–F ): length 1.20, width 0.57. External valve: length 0.81, width 0.26. Internal valve: length 0.78, width 0.27. Operculum: length 0.37, width 0.45.

Distribution. São Paulo, Brazil ( Fig. 25 ).

Figures

FIGURE 20. Abiliodesmus planaltensis (Schubart, 1960) comb. nov. (holotype, MZSP 1086), 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 24. Left vulva. Gangugia tapirapensis Schubart, 1947 (paralectotype, MZSP 1070): (A), ventral view; (B), lateral view. Gangugia mula n. sp. (paratype, IBSP 276): (C), ventral view; (D), lateral view. Abiliodesmus planaltensis (Schubart, 1960) comb. nov. (IBSP 3569): (E), ventral view; (F), lateral view. Abiliodesmus cataractae (Hoffman, 1976) comb. nov. (paratype, MZSP 1066). (G), ventral view; (H), lateral view. Scale bars: 0,5 mm.Abbreviations: EV, external valve; IV, internal valve; Op, operculum.

FIGURE 25. Distribution map of Abiliodesmus n. gen. species.