Cladistic analysis and taxonomic review of the millipede tribe Arthrosolaenomeridini Hoffman, 1976 (Polydesmida: Chelodesmidae) Bouzan, Rodrigo Salvador Iniesta, Luiz Felipe M. Brescovit, Antonio Domingos Zootaxa 2021 2021-05-14 4970 2 201 256 8H7SL Bouzan & Iniesta & Brescovit, 2021 Bouzan & Iniesta & Brescovit 2021 [151,449,1014,1041] Diplopoda Chelodesmidae Arthrosolaenomeris Animalia Polydesmida 19 220 Arthropoda species iara sp. nov.   Figures 9, 10G–H, 11  urn:lsid:zoobank.org:act: AEBF860A-7309-4E68-BE80-F2A27710CDD0   Type material.  Male holotypefrom Usina Hidrelétrica Guaporé, Vale São Domingosand Pontes de Lacerda( 15°11’60”S, 59°22’00”W), Mato Grosso, Brazil,  03.X.2002, G. Marçalcoll., deposited in IBSP 1577.  Paratypes: one maleand one femalefrom Chapada dos Parecis, Diamantino( 14°09’43”S, 57°08’01”W), Mato Grosso, Brazil,  XI.1993, D. Novaisand R.  Pardinicoll., deposited in IBSP 7537.  Additional material.  BRAZIL:  Mato Grosso: Vila Bela da Santíssima Trindade( 15°00’00”S, 59°57’00”W), Fazenda Barranco Alto, 4♂, 2♀and one juvenile,  14.XI.2015, A. Chagas-Jr and A.B. Kurycoll. ( CZUFMT 841); Porto Esperidião ( 15°51’11”S, 58°27’36”W), 1♂,  18–22.XII.1976, P.E. Vanzolinicoll. ( MZSP 1081).   Diagnosis.Adult males differ from all other species of the genus by the absence of the secondary process in the prefemoral process ( Fig. 9D).   Description.Male ( Holotype, IBSP 1577). Coloration (long-preserved in 70% ethanol): Head and antennae ochre with the seventh antennomere darker. Body ocher and paranota tip with the same color as the body ( Figs 9A– C). Legs ocher whitish. Telson ocher. Total length: 68.40. Total width: 10.13mm. Collum 2.93 length, 9.89 width. Antennomere lengths (1>7): 0.77; 2.12; 1.93; 1.62; 1.70; 1.49; 0.44. Podomeres lengths (1>7): 1.24; 1.70; 2.64; 1.51; 1.96; 2.00; 0.56. Gonopod aperture 2.13 length, 3.83 width. Telson 1.43 length. Gonopod: 2.92 length, 2.90 width. Gonocoxae: 1.18 length, 1.50 width. Telopodite: 2.92 length, 1.48 width. Prefemoral region 1/3 the size of telopodite. Prefemoral process long and acute, starting from an angle of 180°, ascending parallel to the solenomere and partially covering it in mesal view ( Fig. 9D). Solenomere long, wide in the middle zone due to the presence of the cingulum and narrowing at the apex ( Fig. 9F). Cingulum in medial position ( Fig. 9F). Apex of the solenomere abruptly descending ( Fig. 9D). Female ( paratype, IBSP 7537). Body as in male, except for sternites with triangular projections, legs showing dorsal projections not conspicuous and without granules. Total length: 69.42. Total width: 9.49. Collum 3.15 length, 8.82 width. Antennomere lengths (1>7): 0.73; 1.95; 1,45; 1.30; 1.35; 1.22; 0.35. Podomeres lengths (1>7): 0.83; 1.06; 2.06; 1.04; 1.44; 1.50; 0.46. Telson 1.46 length. Epigyne rounded with irregular edges. Vulvae ( Figs 10G–H): 1.42 length, 0.67 width. External valve: 1.01 length, 0.30 width. Internal valve: 0.99 length, 0.28 width. Operculum: 0.44 length, 0.54 width.   Distribution. Mato Grosso, Brazil( Fig. 11).   Etymology.The species epithet is a reference of the Brazilian folkloric character “Iara”. According to the indigenous legend, Iara is a beautiful mermaid that inhabits the rivers of the north of the country. Noun in apposition. 3125622362 2002-10-03 IBSP de Lacerda & G. Marcal Brazil Pontes de Lacerda -15.2 Male 21 -59.366665 Vale Sao Domingos 19 220 IBSP 1577 1 Mato Grosso holotype 3125622363 1993-11 R Chapada dos Parecis & D. Novais Brazil -14.161944 Diamantino 21 -57.133614 19 220 2 1 1 Mato Grosso paratype 3125622329 [458,877,1260,1287] IBSP Pardini Brazil 19 220 IBSP 7537 1 Mato Grosso paratype 3125622341 1976-12-18 2015-11-14 1976-12-18 CZUFMT, MZSP A. B. Kury & P. E. Vanzolini Brazil -15.853056 Fazenda Barranco Alto 21 -58.46 Vila Bela da Santissima Trindade 19 220 CZUFMT 841, MZSP 1081 8 2 1 5 Mato Grosso 3125622320 [151,1287,1368,1395] 1976-12-18 2015-11-14 1976-12-18 CZUFMT, MZSP A. B. Kury & P. E. Vanzolini Brazil -15.853056 Fazenda Barranco Alto 21 -58.46 Vila Bela da Santissima Trindade 19 220 CZUFMT 841, MZSP 1081 8 2 1 5 Mato Grosso