Gangugia mula,

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: 231-234

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Gangugia mula

n. sp.

Gangugia mula  n. sp.

Figures 17–18View FIGURE 17View FIGURE 18, 24C– DView FIGURE 24

Type material. Male holotype from UHE Tucuruí, Tucuruí (03°42’01”S, 49°42’00”W), Pará, Brazil, 1984, Instituto Butantan Expedition coll., deposited in IBSP 277View MaterialsGoogleMaps  . Paratype: three females with the same data of the holotype, deposited in IBSP 274View Materials,GoogleMaps  IBSP 276View MaterialsGoogleMaps  , and IBSP 278View Materials  .

Diagnosis. Adult males differ from all other species of the genus by the combination of the following characters: legs from the fifth to the eighth segment with ventral projections in the coxae ( Fig. 31BView FIGURE 31); presence of triangular lateral expansion near the apex of the solenomere ( Fig. 17FView FIGURE 17) and presence of a short secondary process in the prefemoral process ( Fig. 17DView FIGURE 17).

Description. Male (Holotype, IBSP 277). Coloration (long-preserved in 70% ethanol): Head light brown. Antennae ocher yellowish. Body brown, with the edge of the paranota lighter ( Fig. 17A–CView FIGURE 17). Legs ocher yellowish. Legs from the fifth to the eighth segment with ventral projections in the coxae being the posterior pair of the sixth segment extremely elongated. Telson ocher. Total length: 65.51. Total width: 11.50. Collum, length 3.44, width 10.82. Antennomere lengths (1>7): 0.95; 2.38; 2.14; 1.88; 1.79; 1.70; 0.35. Podomeres lengths (1>7): 1.19; 1.69; 2.99; 1.42; 1.86; 1.90; 0.45. Gonopod aperture, length 2.46, width 4.87. Telson, length 1.41. Gonopod: length 3.42, width 3.07. Gonocoxae: length 1.51, width 1.36. Gonocoxae globose, about 1/2 the size of the telopodite. Telopodite: length 3.33, width 1.62. Prefemoral region short ( Fig. 17DView FIGURE 17). Prefemoral process ( Fig. 17D–FView FIGURE 17) long and curve, presenting a dorso-basal lobe, starting from an angle of 225°, involving the solenomere in its initial portion and subsequently ascending parallel to the solenomere and partially covering it in ectal view ( Fig. 17FView FIGURE 17); in its anterior portion presents an elongated, thin and acuminate secondary process ( Fig. 17DView FIGURE 17). Solenomere long, curved and with a lateral expansion ( Fig. 17FView FIGURE 17), but not reaching the apex of the prefemoral process. Cingulum in basal position, covered by the prefemoral process. Apex of the solenomere abruptly descending ( Figs 17D–EView FIGURE 17).

Female (IBSP 276). Body as in male, except for the legs; without modifications. Total length: 75.74. Total width: 11.46. Antennomere lengths (1>7): 0.74; 2.07; 1.98; 1.70; 1.66; 1.75; 0.35. Podomeres lengths (1>7): 1.10; 1.29; 3.048; 1.040; 1.28; 1.62; 0.32. Telson, length 1.35. Epigyne rounded with irregular edges. Vulvae ( Figs 24C–DView FIGURE 24): length 2.20, width 0.88. External valve: length 1.17, width 0.39. Internal valve: length 1.17, width 0.43. Operculum: length 0.32, width 0.62.

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

Etymology. The species epithet is a reference of the Brazilian folkloric character “Mula-sem-cabeça”.According to the legend, of uncertain origin, it’s a mule of brown color with a torch of fire in the place of the head. Noun in apposition.