Identification key to Haematotropis species based on adult males
1 Paranota of rings 2–4 with anterolateral teeth (Fig. 2G)....................................................... 2
- Paranota of rings 2–17 with anterolateral teeth (Fig. 24C)....................................... H. dentata sp. nov.
2 Collum with posterolateral margins straight or slightly concave (Figs 3A, B, 18B, 34B)...............................9
- Collum with posterolateral margins strongly concave, sickle-shaped (Figs 5A, 13A)................................ 3
3 Gonopod with LP2 (Fig. 29A, C)........................................................... H. goeldii sp. nov.
- Gonopod without LP2................................................................................. 4
4 Gonopod with solenomere approximately as long as length of LP1 (Fig. 14A, C)......... H. octocentra (Brölemann, 1905)
- Gonopod with solenomere approximately as short as length of LP1 (Fig. 6A, C)....................................5
5 Gonopod with VP1 exceeding the width of ventral region of acropodite, in lateral view (Fig. 6C).......................6
- Gonopod VP1 not exceeding the width of ventral region of acropodite, in lateral view (Fig. 31C)...................... 7
6 Gonopod with LP1 tapered (Figs 6B–D, 8A, B)........................................... H. bella (Attems, 1937)
- Gonopod with LP1 rounded, hemispheric (Fig. 41A–D)........................................ H. poranga sp. nov.
7 Gonopod with LP1 disctinctly shorter than width of ventral region of acropodite (Fig. 31B, D)....... H. jurutiensis sp. nov.
- Gonopod with LP1 approximately as long as width of ventral region of acropodite (Figs 43A–D, 21A–D)............... 8
8 Gonopod with LP1 projected towards the solenomere (Fig. 43A–D)................................ H. tysoni sp. nov.
- Gonopod with LP1 projected towards the coxa (Fig. 21A–D)................................. H. aripuanensis sp. nov.
9 Gonopod with VP2 (Fig. 35A, C)....................................................... H. melgacensis sp. nov.
- Gonopod without VP2................................................................................ 10
10 Gonopod with DP (Figs 10A–C, 27A–C)..................................................................11
- Gonopod without DP..................................................................................12
11 Gonopod with DP bifurcate (Fig. 27A, C)............................................... H. disjunctoides sp. nov.
- Gonopod with DP not bifurcate (Fig. 10A, C)......................... H. disjunta Golovatch, Hoffman & Spelda, 2004
12 Gonopod with LP3 (Fig. 45B, D)........................................ H. divergens (Chamberlin, 1918) n. comb.
- Gonopod without LP3................................................................................ 13
13 Gonopod with a process like a finger on the acropodite region....... H. roseicornis Jeekel, 2000 (see Jeekel, 2000: 79, fig. 8)
- Gonopod without a process like a finger on the acropodite region.............................................. 14
14 Gonopod with the distal margin of acropodite projected forward, in lateral view (Figs 12C, 19C, 33C, 37C, 39C)........ 16
- Gonopod with the distal margin of acropodite directed downward, projected towards the coxa (Fig. 4A, B)............. 15
15 Gonopod with VP1 exceeding the width of ventral region of acropodite, in lateral view (Fig. 4A)... H. callipa (Peters, 1864)
- Gonopod VP1 not exceeding the width of ventral region of acropodite, in mesal view.................................................................................................. H. aurorea (see Jeekel, 2000: 76, figs 4, 5)
16 Gonopod somewhat aligned, in lateral view (Fig. 33C)............................................ H. driki sp. nov.
- Gonopod distinctly curved distally, in lateral view (Fig. 12C)................................................. 17
17 Gonopod with a long solenomere.........................................................................18
- Gonopod with a short solenomere....................................................................... 19
18 Gonopod with solenomere laterally curved (Fig. 23A, B).......................................... H. callyi sp. nov.
- Gonopod with solenomere not laterally curved.............................................. .. H. mosaica sp. nov.
19 Gonopod with VP1 exceeding the width of ventral region of acropodite, in lateral view (Figs 12C, 39C)............... 20
- Gonopod VP1 not exceeding the width of ventral region of acropodite, in mesal view (Fig. 19A)..... H. amazonica sp. nov.
20 Gonopod with distal region of acropodite lightly sinuous, in lateral view (Fig. 39C)................. H. paraensis sp. nov.
- Gonopod with distal region of acropodite strongly sinuous, in lateral view (Fig. 12C)............................................................................................. H. macapa Golovatch, Hoffman & Spelda, 2004