Abiliodesmus cataractae ( Hoffman, 1976 ) 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 : 238

Abiliodesmus cataractae ( Hoffman, 1976) new combination

Figures 21 , 24G–H , 25

Angelodesmus cataractae Hoffman, 1976: 174 , figs 1−6. Male holotype and female paratype from Fazenda Cachoeirinha , Jataí (17°52’54”S, 51°42’51”W), Goiás, Brazil, XI.1962, Departamento de Zoologia Expedition coll., deposited in MZSP 1065 and 1066, respectively, examined.

Diagnosis. Adult males differ from all other species of the genus by the combination of the following characters: sternite of seventh body ring without ventral projections, presence of a large lateral expansion in the solenomere ( Figs 21D–E ) and the prefemoral process not involving the solenomere, in ectal view ( Fig. 21E ).

Description. Male (Holotype, MZSP 1065). Coloration (long-preserved in 70% ethanol): Head and antennae ochre with the seventh antennomere having three well-demarcated invaginations and one slight invagination between the sensory cones. Body ocher with the edges of the paranota whitish ( Figs 21A–C ). Legs ocher yellowish. Telson ocher. Total length: 37.14. Total width: 5.88. Collum, length 1.83, width 5.52. Antennomere lengths (1>7): 0.52; 1.40; 1.25; 1.09; 1.03; 1.17; 0.30. Podomeres lengths (1>7): 0.69; 0.88; 1.98; 0.83; 1.03; 1.39; 0.45. Gonopod aperture, length 1.14, width 1.93. Telson, length 0.95. Gonopods: lost.

Female (Paratype, MZSP 1066). Body as in male. Total length: 35.90. Total width: 5.64. Antennomere lengths (1>7): 0.51; 0.91; 1.06; 1.06; 0.83; 1.16; 0.22. Podomeres lengths (1>7): 0.50; 0.74; 1.64; 0.55; 0.70; 1.13; 0.38. Telson, length 0.81. Epigyne rounded with regular edges. Vulvae ( Figs 24G–H ): length 0.95, width 0.50. External valve: length 0.63, width 0.22. Internal valve: length 0.64, width 0.22. Operculum: length 0.32, width 0.39.

Distribution. Known only from the type locality ( Fig. 25 ).

Figures

FIGURE 21. Abiliodesmus cataractae (Hoffman, 1976) comb. nov. (holotype, MZSP 1065), dorsal views of anterior (A), midbody (B) and posterior (C) body rings. Scale bars: 2 mm. Left gonopod (Modified by Hoffman, 1976). (D), mesal view; (E), ectal view. Scale bars: 0,5 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.