Taxonomic review of the millipede genus Haematotropis Jeekel, 2000 (Diplopoda, Polydesmida, Aphelidesmidae, Aphelidesminae) with descriptions of thirteen new species De, Thaís M. Bueno-Villegas, Almeida Julián Rafael, José A. Zootaxa 2021 2021-11-08 5064 1 1 71 De & Bueno-Villegas & Rafael, 2021 De & Bueno-Villegas & Rafael 2021 [151,494,1411,1437] Diplopoda Aphelidesmidae Haematotropis Animalia Polydesmida 28 29 Arthropoda species aripuanensis sp. nov.   Figs 20, 21, 48A, 52   Diagnosis.Adult males of  H. aripuanensis  sp. nov.differ from other  Haematotropisspeciesbased on the following combination of characters: gonopod with long and spatulate LP1 with slightly pointed apex, projected towards the coxa ( Fig. 21A–D); solenomere short with slightly acuminated apex, projected towards the ventral region of the body ( Fig. 21A, C).   Material examined.   Holotype ♂, Brasil, Mato Grosso, Aripuanã,  22.VIII–2.IX.1997, G. Skukleg. ( MZUSP 969).   Description.  Size and form( holotype ♂). Body length = 59 and wide = 8 mm. TL/GW = 7.3.  Coloration(long preserved in 70% ethanol). Head, prozonite, metazonite and telson brown, yellowish hemispheric spot in posterior region of the metazonite and posterior region of epiproct, antennomeres, paranota and legs orange ( Fig. 20A–D).  Head.Dorsal surface smooth and shiny, without microgranulations.  Trunk.Collum 2.8 mmlong, 7.6 mmwide; dorsal surface of all rings smooth and shiny, without microgranulations; posterolateral margins strongly concave, sickle-shaped ( Fig. 20A, B). Rings 2–19: prozonite and metazonite smooth and shiny, without microgranulation in the dorsal region of all rings. Anterolateral teeth on paranota of rings 2–4 ( Fig. 2G). Lateral margins of ring 2 projected posteriad ( Fig. 20A, B). Gonopodal aperture elliptical, approximately 2.11 mmwide and 1.3 mmlong at midpoints. Telson ( Fig. 20D) smooth and shiny, without microgranulations.  Legs.Smooth and shiny, without microgranulations.  Gonopods.Right gonopod structure as follows: coxa with lateral swelling at midlength ( Fig. 21A, C); acropodite elongated, about four times as long as prefemur; median region expanded, cup-shaped in ventral view, with a concavity and cavity ( Fig. 21D); distal region of acropodite strongly sinuous, not bifurcate, curved ventrally at an 90° angle ( Fig. 21A–D); VP1 emarginated on posterior region, not very evident, not exceeding the width of ventral region of acropodite, in lateral view ( Fig. 21A, C); VP2 absent; LP1 long and spatulate, hemispheric apex, projected towards the coxa ( Fig. 21A–D), LP2, LP3 and DP absent. Opening of solenomere not located at the distal end of acropodite. Solenomere short, slightly acuminated apex, projected towards the ventral region of millipede body ( Fig. 21A, C).   Remarks.Similar to  H. goeldii  sp. nov.( Fig. 28A–D) with respect to the colour pattern with hemispherical spots in the posterior region of the metazonites. Distal region of the acropodite more sinuous than  H. goeldii  sp. nov.( Fig. 29A, C). Only LP1 is observed ( Fig. 21A–D), whereas in  H. goeldii  sp. nov., LP1 and LP2 are present ( Fig. 29A,C).   Distribution. Brazil, Mato Grosso( Fig. 52).   Etymology.It refers to the typelocality: Aripuanã, located in the state of Mato Grosso, Brazil. 3424712305 1997-08-22 1997-09-02 1997-08-22 MZUSP G. Skuk Brazil Aripuana 28 29 MZUSP 969 1 1 Mato Grosso holotype