Coarazuphium spinifemur,

Pellegrini, Thais Giovannini & Ferreira, Rodrigo Lopes, 2017, Two new troglobitic Coarazuphium Gnaspini, Godoy & Vanin 1998 species of ground beetles from iron ore Brazilian caves (Coleoptera: Carabidae: Zuphiini), Zootaxa 4306 (4), pp. 551-566: 552-555

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Coarazuphium spinifemur

sp. n.

Coarazuphium spinifemur  sp. n.

Description. Holotype male ( Fig. 1View FIGURE 1). Overall body length, from the apex of the clypeus to the apex of the elytra: 3.54 mm, width, at widest region of the elytra: 1.16 mm. Body coloration is pale yellowish, although this is probably a specimen in teneral state, in which the tegument has not hardened and it may be pale in color ( Fig. 8View FIGURE 8 G). Dorsal integument of the elytra and pronotum entirely covered with very short recumbent setae, the head also has recumbent setae but the top is glabrous.

Head. Subtrapezoidal ( Fig. 1View FIGURE 1) with similar width and length, width/length ratio: 0.90. Maximum width of head at its base, 0.85 mm. Head as wide as pronotum. Dorsal surface with one pair of setae laterally to eyes (supraorbital setae), and one pair located immediately behind ocular area (occipital setae). Ventral surface with one pair of anterior setae, located outside from gular area ( Fig. 2View FIGURE 2 A). Eyes reduced and depigmented, ommatidia not evident, situated laterally at the end of antennal impression of the head ( Fig. 2View FIGURE 2 A).

Antennae. Antennae filiform and flagellar, ( Fig. 1View FIGURE 1) 2.39 mm, 3.58 times longer than pronotum; first antennomere (scape) elongate, shorter than 2–4 together. First antennomere with a long bristle close to the middle; 2nd very short. Segments 3–10 subequal, almost round in cross-section, except for the tip of the terminal antennomere (11th), which is laterally flattened ( Fig. 1View FIGURE 1).

Pronotum. Shape trapezoidal, 1.27 times wider than long ( Figs. 1–2View FIGURE 1View FIGURE 2). Maximum width near anterior angle, as wide as head. Posterior angle is acute. Dorsal surface ( Fig. 1View FIGURE 1) with two pairs of erect setae: one close to the anterior angle of the pronotum and the other, shorter, close to the posterior angle. Ventral surface with one pair of anterior setae medially located ( Fig. 2View FIGURE 2 B).

Elytra hind wings and abdomen. Elytra are free ( Fig. 1View FIGURE 1), together 1.64 times longer than wide. Maximum width nearly middle and 1.37 times wider than pronotum. Apex of elytra is truncate, not sinuate. Seven long umbilicate setae on each elytron: 3 close to the anterior angle, 2 marginal in posterior half, and 2 on posterior margin. Hind wings reduced ( Fig. 1View FIGURE 1 B), 0.363 mm long. Abdominal tergites 1–5, glabrous, sixth sternum with a short pair of ventral setae at its posterior margin.

Legs. Procoxa glabrous; mesocoxa with three, and metacoxa with two pairs of setae. Pro-, meso- and metatrochanter each with one medial setae. Profemur with long and short setae. Profemur 1.13 times longer than the mesofemur and 0.76 times the length of metafemur. Metafemur bearing a spine at the middle ventral view ( Fig 1View FIGURE 1 A, 1C). Protibia 1.1 times longer than the mesotibia and 0.78 times the length of metatibia. Protibia 1.19 times longer than protarsus. Mesotibia 0.92 times the length of mesotarsus; metatibia 0.96 times the length of metatarsus. First tarsomere of mesotarsus and metatarsus almost equal to tarsomeres 2–4 together. Length of protibia and tarsus 2.03 times the length of the pronotum. Length of mesotibia and tarsus length 2.08 times, and length of metatibia and tarsus 2.88 times the length of pronotum.

Aedeagus. Phallus slightly curved ventrally and elongate, narrowed apically, apical margin rounded ( Figs. 3View FIGURE 3 A – C), 0.66 mm long. Left paramere subtriangular, conchoid, about two times longer than wide, 0.23 mm long; right paramere styliform, about 2.5 times longer than wide, distinctly shorter, 0.14 mm long. Male genital segment triangular shaped.

Etymology. The specific epithet “ spinifemur  ” refers to the unusual spine at the middle ventral side of each metafemur.

Differential diagnosis. All characteristics of C. spinifemur  are consistent with the description of the genus Coarazuphium  . This species differs from all others of the genus by the following combination of characters: reduced and depigmented eyes; maximum width of elytra near middle with almost parallel sides; elytra with apical margin truncate, not sinuate; head dorsally with only one pair of supraorbital setae (posterior pair absent); metafemur bearing a spine at the middle ventral side; antennae short, about 0.68 times body length.

Type material. Holotype: BRAZIL: Pará, Serra dos Carajás, Cave SL-0074 Curionópolis, PA, 5o57`58.04”S 49o37`55.95”W, 575m asl., ♂, 24.VI.2010, Zampaulo R.A., et al. leg., ISLA 2289.GoogleMaps