Taxonomic review of the millipede genus Haematotropis Jeekel, 2000 (Diplopoda, Polydesmida, Aphelidesmidae, Aphelidesminae) with descriptions of thirteen new species Author De, Thaís M. 0000-0002-0282-1043 Instituto Nacional de Pesquisas da Amazônia – INPA, CPEN – Programa de Pós-Graduação em Entomologia, Campus II, CEP 69067 - 375, Manaus, Amazonas, Brasil. thais.melo20@gmail.com Author Bueno-Villegas, Almeida Julián 0000-0003-0477-8373 Laboratorio de Sistemática Animal, Área Académica de Biología, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, México. julian_bueno@uaeh.edu.mx Author Rafael, José A. 0000-0002-0170-0514 jarafael@inpa.gov.br text Zootaxa 2021 2021-11-08 5064 1 1 71 journal article 2821 10.11646/zootaxa.5064.1.1 21469968-9bc4-4c70-bbaa-f15af634584b 1175-5326 5653702 65B0A21A-8B8D-4B55-B6F0-8BE60EB8D3BC Haematotropis tysoni sp. nov. Figs 42 , 43 , 49F , 51 Diagnosis. Adult males of H . tysoni sp. nov. differ from other species of Haematotropis based on the following combination of characters: gonopod with long and spatulate LP1 ( Fig. 43A–D ), projected towards the solenomere; solenomere short with acuminated apex, projected towards the coxa ( Fig. 43A, C ). Material examined. Holotype ♂ , Brasil , Amazonas , Barreirinha , próximo a aldeia Porto Alegre , nas calhas do rio Andirá , 20.IV.2018 , Alexandre Tyson leg. ( INPA ). Paratype : 1 ♂ , Brasil , Amazonas , Barreirinha , próximo a aldeia Porto Alegre , nas calhas do rio Andirá , 20.IV.2018 , Alexandre Tyson leg. ( INPA ) . Description. Size and form ( holotype ♂ ). Body length = 38 and wide = 8 mm . TL/GW = 4.75. Coloration (long preserved in 70% ethanol). Head, prozonite, metazonite and telson dark brown, legs brown, antennomeres, sides of metazonite and paranota orange ( Fig. 42A–D ). Head. Dorsal surface smooth and shiny, without microgranulations. Trunk. Collum 3.0 mm long, 8.0 mm wide; dorsal surface of all rings smooth and shiny, without microgranulation; posterolateral margins strongly concave, sickle-shaped ( Fig. 42D ). Rings 2–19: prozonite and metazonite smooth and shiny, without microgranulation in dorsal region of all rings. Anterolateral teeth on paranota of rings 2–4 ( Fig. 2G ). Lateral margins of ring 2 projected posteriad, sickle-shaped ( Fig. 42A, B ). Gonopodal aperture elliptical, approximately 1 mm wide and 0.7 mm long at midpoints. Telson ( Fig. 42D ) smooth and shiny, without microgranulations. Legs. Smooth and shiny, without microgranulations. Gonopods. Left gonopod structure as follows: coxa with lateral swelling at midlength ( Fig. 43A, C ); acropodite elongated, about four times as long as prefemur; median region expanded, cup-shaped in ventral view, with a concavity and cavity ( Fig. 43D ); distal region of acropodite lightly sinuous, not bifurcate, curved ventrally at a 65° angle ( Fig. 43A–D ); VP1 emarginated on posterior region, not very evident, not exceeding the width of ventral region of acropodite, in lateral view ( Fig. 43A, C ); VP2 absent; LP1 long and spatulate, projected towards the solenomere ( Fig. 43A, C ), LP2, LP3 and DP absent. Opening of solenomere not located at distal end of acropodite. Solenomere short, acuminated apex and projected towards the coxa ( Fig. 43A, C ). Remarks. Similar to H . jurutiensis sp. nov. ( Fig. 30A–D ) and H . poranga sp. nov. ( Fig. 40A–D ) in the posterolateral margins being strongly concave and the tegument dark brown. The differences are mainly the LP1 hemispheric in H . poranga sp. nov. ( Fig. 41A–D ), while in H . jurutiensis sp. nov. , LP1 is short with acuminated apex, almost vestigial ( Fig. 31A–D ), and LP1 long and spatulate in H . tysoni sp. nov. ( Fig. 43A–D ). Distribution. Brazil : Amazonas ( Fig. 51 ). Etymology. This new species is dedicated to its collector and the first author’s friend Tyson Ferreira. FIGURE 42. Somatic features of Haematotropis tysoni sp. nov. , holotype ♂ (INPA). A. Head and body rings 1–4, dorsal view. B. Head and body rings 1–6, lateral view. C. Body rings 8–11, dorsal view. D. Body rings 18–20, dorsal view. Scale bars: 1.0 mm. FIGURE 43. Left gonopod of Haematotropis tysoni sp. nov. , holotype ♂ (INPA). A. Mesal view. B. Dorsal view. C. Lateral view. D. Ventral view. Yellow scale indicates when VP1 exceeds the width of ventral region of acropodite. Abbreviations: Ac = acropodite; Ca = cannula; Cx = coxa; LP1 = Lateral Process 1; Pf = Prefemur; S = Solenomere; Sg = spermatic groove; Ste = setae; VP1 = Ventral Process 1. Scale bars: 1.0 mm. New combination