Haematotropis melgacensis sp. nov.

Figs 1F, 2F, 34, 35, 49B, 51

Diagnosis. Adult males of H. melgacensis sp. nov. differ from other Haematotropis species based on the following combination of characters: gonopod with presence of VP2 (Fig. 35A, C); LP1 long, tapered, inclined, apex projected towards the mesal region of acropodite (Fig. 35A–D); solenomere long and taparared, projected towards the ventral region of the body (Fig. 35A, C).

Material examined. Holotype ♂, Brasil, Pará, Melgaço, Estação Científica Ferreira Penna, 29.XI-03.XII.2012, C.S. Costa leg. (IBSP 3640).

Paratypes: All from Brasil: 2 ♂♂, Pará, Melgaço, Estação Científica Ferreira Penna, 29.XI–03.XII.2012, C.S. Costa leg. (IBSP 3640); 1 ♂, Pará, Melgaço, Estação Científica Ferreira Penna, FLONA Caxiuanã (01º44’18.02”S, 51º27’48.01”W), 06.IV.2002, A.B. Bonaldo leg. (INPA); 1 ♂, Pará, Boca do Cuminá Mirim, 19–26.I.1968, E.P.A. leg. (INPA) .

Additional material: 1 ♂, Brasil, Pará, Melgaço, Estação Científica Ferreira Penna, 29.XI–03.XII.2012, C.S. Costa leg. (IBSP 3640) .

Description.

Size and form (holotype ♂). Body length = 60 and wide = 7 mm. TL/GW = 8.5.

Coloration (long preserved in 70% ethanol). Head, prozonite, metazonite and telson brown, sides of metazonite, paranota, legs and posterior region of epiproct yellow, antennomeres orange (Fig. 34A–D).

Head. Dorsal surface smooth and shiny, without microgranulations.

Trunk. Collum 2.7 mm long, 7.0 mm wide; dorsal surface of all rings smooth and shiny, without microgranulation; posterolateral margins slightly concave (Fig. 34A, B). 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 (Fig. 34A, B). Gonopodal aperture elliptical, approximately 2.1 mm wide and 1.3 mm long at midpoints. Telson (Fig. 34D) smooth and shiny, without microgranulations.

Legs. Smooth and shiny, without microgranulations.

Gonopods. Left gonopod structure as follows: coxa with lateral swelling at midlength absent (Fig. 35A, C); acropodite elongated, about four times as long as prefemur; median region expanded, cup-shaped in ventral view, with a concavity and cavity (Fig. 35D); distal region of acropodite strongly sinuous, not bifurcate, narrow, curved ventrally at a 75° angle (Fig. 35A–D); VP1 and VP2 emarginated on posterior region, evident, VP1 not exceeding the width of ventral region of acropodite, in lateral view; VP2 exceeding the width of ventral region of acropodite, in lateral view (Fig. 35A, C), VP2 greater than VP1 (Fig. 35A, C); LP1 long, tapered, inclined and with apex projected towards the mesal region (Fig. 35A–D), LP2, LP3 and DP absent. Opening of solenomere not located at distal end of acropodite. Solenomere long, tapered and projected towards the ventral region of the body (Fig. 35A, C).

Remarks. This is the only species of the genus with VP2 (Fig. 35A–C). Similar to H. octocentra with respect to the expanded distal region of the acropodite and size of solenomere (Figs 14A–D, 35A–D). However, it differs by the distal region being less ventrally curved and LP1 tapering (Fig. 35A, C). The distal region of acropodite in H. octocentra is strongly curved and LP1 is wide (Fig. 14A–D).

Variations. The metazonite and prozonite may be yellowish, with asymmetrical spots ranging from light brown to dark brown and paranota yellow in some specimens.

Distribution. Brazil: Pará (Fig. 51).

Etymology. The species name refers to the type locality: Melgaço, Pará State, Brazil.