Gangugia tapirapensis Schubart, 1947

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 : 224-226

Gangugia tapirapensis Schubart, 1947

Figures 12 , 18 , 24A–B

Gangugia tapirapensis Schubart, 1947: 8 , figs 4−8. Syntypes: 5 males, 5 females and 15 juveniles from Barra do Tapirapé (now known as Santa Terezinha) (-10.471803°; -50.515290°), Mato Grosso, Brazil, 23.XI.1939 − 15.III.1940, A. L. de Carvalho coll., deposited in MZSP 1069, 1070, 1071, 1076 and MNRJ 11822, examined (male lectotype [MZSP 1076] and all remaining material as paralectotypes here designated). Schubart, 1958: 238; Hoffman, 1976: 179; Golovatch, Hoffman, Adis, Marques, Raizer, Silva, Ribeiro, Silva and Pinheiro, 2005: 277.

Additional material. BRAZIL: Mato Grosso: Barra do Tapirapé (Now known as Santa Terezinha); (-10.471803°; -50.515290°) ; 3♂, 2♀ and one juvenile, XI–XII.1939, A. L. de Carvalho coll. ( MNRJ 12008 ) ; 1♂, I–II.1940, A. L. de Carvalho coll. ( MNRJ 11821 ) ; four juveniles, xii.1839 – ii.1940, A. L. de Carvalho coll. ( MNRJ 11820 , destroyed after the Museu Nacional fire in 2018) ; 84 juveniles ( MNRJ 11677 , destroyed after the Museu Nacional fire in 2018); 94 individuals , xi–xii.1839, A. L. de Carvalho coll. ( MNRJ 11679 , destroyed after the Museu Nacional fire in 2018); 42 individuals, ( MNRJ 11680 , destroyed after the Museu Nacional fire in 2018) ; 1♂ and 1♀, I.1940, A. L. de Carvalho coll. ( MZSP 1072 ) ; 1♀, I–II.1940, A. L. de Carvalho coll. ( MZSP 1073 ) .

Diagnosis. Adult males differ from all other species of the genus by the combination of the following characters: presence of indentations in the prefemoral process ( Fig. 12D ) and presence of a sigmoid curvature in the apex of the solenomere ( Fig. 12F ).

Description. Male (Lectotype, MZSP 1076). Coloration (long-preserved in 70% ethanol): Head and antennae ochre. Body ocher and with the lateral border of the paranota and the posterior edge of the metaterga more whitish ( Figs 12A–C ). Legs ochre. Telson ocher. Total length: 62.08. Total width: 9.78. Collum, length 2.82, width 9.11. Antennomere lengths (1>7): 0.81; 2.19; 1.57; 1.45; 1.37; 1.43; 0.37. Podomeres lengths (1>7): 1.03; 1.30; 2.83; 1.25; 1.58; 1.69; 0.47. Gonopod aperture, length 2.00, width 4.32. Telson, length 1.22. Gonopod: length 2.97, width 2.79. Gonocoxae: length 1.37, width 0.98. Telopodite: length 2.25, width 1.85. Prefemoral process long (larger than the solenomere), narrow and curved, terminal portion presenting numerous indentations ( Figs 12D–E ). Solenomere long, narrow and curved ( Fig. 12D ). Cingulum in basal position ( Fig. 12F ). Apex of the solenomere with descending sigmoid curvature ( Fig. 12F ).

Female (Paralectotype, MZSP 1070). Body as in male, except for the legs; without modifications, with only the presence of a slight dorsal lobe in the prefemur of the anterior legs. Total length: 56.19. Total width: 9.00. Antennomere lengths (1>7): 0.65; 1.67; 1.29; 1.22; 1.23; 1.16; 0.36. Podomeres lengths (1>7): 0.69; 1.08; 2.61; 0.92; 1.03; 1.47; 0.43. Telson, length 1.06. Epigyne triangular with irregular edges. Vulvae ( Figs 24A–B ): length 1.57, width 0.83. External valve: length 1.12, width 0.37. Internal valve: length 1.11, width 0.42. Operculum: length 0.45, width 0.63.

Distribution. Known only from the type locality ( Fig. 18 ).

Figures

FIGURE 12. Gangugia tapirapensis Schubart, 1947 (lectotype, MZSP 1076), 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 18. Distribution map of Gangugia Schubart, 1947 species.

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.