Abiliodesmus mapinguari, 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 : 240-244

Abiliodesmus mapinguari n. sp.

Figures 23 , 25 , 27A–B

urn:lsid:zoobank.org:act:12BBB981-7D78-40C3-A78B-3314E5268F0D

Type material. Male holotype from Palmas (10°12’47”S, 48°21’37”W), Tocantins, Brazil, X.2001, I. Knysak and

R. Martins coll., deposited in IBSP 1699 . Paratypes: two females with same data of the holotype , IBSP 7787 ; one male and one female from Fazenda Giovam , Porto Nacional (10°42’30”S, 48°25’01”W), Tocantins, Brazil, 01.XII.2013, Chagas-Jr, A. and Giupponi, A. coll., deposited in CZUFMT 834 .

Additional material. BRAZIL: Tocantins: Porto Nacional (10°42’30”S, 48°25’01”W), Fazenda Giovam , 1♂, 02.XII.2013, A. Chagas-Jr and A. Giupponi coll. ( CZUFMT 839 ) ; woods near the to the Tocantins River , 1♂, 29.XI.2013, A. Chagas-Jr and A. Giupponi coll. ( CZUFMT 837 ) ; Taquaruçu (10°18’21”S, 48°10’17”W), Vai Quem Quer , 1♂, 30.XI.2013, A. Chagas-Jr and A. Giupponi coll. ( CZUFMT 836 ) .

Diagnosis. Adult males differ from all other species of the genus by the combination of the following characters: presence of a secondary process at the apex of the prefemoral process ( Figs 23D ); absence of a lateral expansion in the solenomere ( Figs 23D–E ) and the prefemoral process involving the solenomere, in ectal view ( Fig. 23F ).

Description. Male (Holotype, IBSP 1699). Coloration (long-preserved in 70% ethanol): Head reddish brown with the labrum yellowish. Antennae reddish brown. Body reddish brown with the edges of the paranota whitish ( Figs 23A–C ). Legs ocher whitish. Telson reddish brown. Total length: 59.44. Total width: 9.64. Collum 3.04 length, 8.85 width. Antennomere lengths (1>7): 0.72; 1.68; 1.52; 1.78; 1.73; 1.44; 0.29. Podomeres lengths (1>7): 0.92; 1.25; 2.30; 0.95; 1.21; 1.56; 0.55. Gonopod aperture 1.70 length, 3.03 width. Telson 1.82 length. Gonopod: 3.15 length, 2.25 width. gonocoxae: 1.00 length, 1.27 width. Telopodite: 3.09 length, 0.95 width. Prefemoral region short, 1/4 the size of telopodite. Prefemoral process ( Figs 23D–F ) long and narrow, presenting a dorso-basal lobe, starting from an angle of 180°, involving the solenomere in its initial portion, subsequently ascending parallel to the solenomere and partially covering it in ectal view, apex dividing into two acute projections ( Fig. 23D ). Solenomere long, but not reaching the apex of the prefemoral process ( Fig. 23D ). Cingulum in basal position ( Fig. 23F ). Apex of the solenomere sickle-shaped with sigmoid curvature ( Fig. 23D ).

Female (Paratype, IBSP 1699). Body as in male. Total length: 69.15. Total width: 9.62. Collum 3.43 length, 9.60 width. Antennomere lengths (1>7): 0.72; 2.00; 1.77; 1.51; 1.61; 1.44; 0.42. Podomeres lengths (1>7): 0.92; 1.12; 2.22; 1.00; 1.13; 1.60; 0.49. Telson 1.47 length. Epigyne rounded with regular edges. Vulvae ( Figs 27A–B ): 1.50 length, 0.70 width. External valve: 1.16 length, 0.29 width. Internal valve: 1.04 length, 0.34 width. Operculum: 0.37 length, 0.54 width.

Distribution. Tocantins, Brazil ( Fig. 25 ).

Etymology. The species epithet is a reference of the Brazilian folkloric character “Mapinguari”. According to the indigenous legend, the “Mapinguari” is a hairy giant with one eye on the forehead and the mouth at the navel, living in the Amazon rainforest of Brazil. Noun in apposition.

Figures

FIGURE 23. Abiliodesmus mapinguari n. sp. (holotype, IBSP 1699), 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 25. Distribution map of Abiliodesmus n. gen. species.

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.