Carapoia bispina Huber 2018, sp. n.

Carapoia bispina sp. n.

Figs 675–676, 704–710, 717, 720

Diagnosis. Distinguished from known congeners by details of male pedipalp (Figs 704–706; tarsus with unique pair of heavy spines; bulbal apophysis with two pointed tips), by armature of male chelicerae (Figs 707–708; pair of large proximal apophyses, slightly diverging), and by simple epigynum without pocket, with dark internal ‘valve’ visible through cuticle (Figs 709, 717).

Etymology. The specific name refers to the unique pair of spines on the procursus (Latin spina = spine, thorn); noun in apposition.

Type material. BRAZIL: Pernambuco: ♂ holotype, 1♀ paratype, UFMG (21564–65), and 2♂ 5♀ paratypes, ZFMK (Ar 19300), near Bonito, forest near Cachoeira da Gruta (8.547°S, 35.712°W), 380 m a.s.l., 24–25.v.2015 (B.A. Huber, L.S. Carvalho).

Other material examined. BRAZIL: Pernambuco: 1♀ 2 juvs in pure ethanol, ZFMK (Br15-221), same data as type material.

Description. Male (holotype)

MEASUREMENTS. Total body length 1.7, carapace width 0.65. Distance PME-PME 80 µm, diameter PME 70 µm, distance PME-ALE 35 µm, distance AME-AME 10 µm, diameter AME 20 µm. Sternum width/length: 0.50/ 0.40. Leg 1: 6.8 (1.6 + 0.3 + 1.8 + 2.3 + 0.8), leg 2 missing, tibia 3: 0.7, tibia 4: 1.0; tibia 1 L/d: 30. Femora 1–4 width (at half length): 0.15, —, 0.17, 0.17.

COLOR (in ethanol). Prosoma and legs ochre, legs without dark or light rings; abdomen dorsally and laterally densely covered with dark marks, ventrally with light brown areas in front of gonopore and in front of spinnerets.

BODY. Habitus as in Fig. 675; ocular area only weakly raised; carapace with high pair of humps separated by distinct median furrow; clypeus strongly protruding but otherwise unmodified; sternum unmodified.

CHELICERAE. As in Figs 707–708; with pair of large, slightly diverging apophyses proximally.

PALPS. As in Figs 704–705; coxa with large retrolateral apophysis; trochanter with small ventral process; femur slender, with retrolateral process proximally; tarsus with large process provided with two distinctive spines; procursus with membranous and sclerotized elements distally (Fig. 706); genital bulb with distinctive apophysis with two tips, with whitish dorsal protrusion.

LEGS. Densely covered with regular short hairs, without spines and curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 21%; prolateral trichobothrium present on tibia 1; tarsus 1 with ~15 pseudosegments, distally fairly distinct.

Male (variation). Tibia 1 in other male: 1.7 (missing in third male seen); tibia 2/tibia 4 length in other male: 1.0/1.0.

Female. In general similar to male but clypeus less protruding. Tibia 1 in six females: 1.5–1.7 (mean 1.6). Epigynum as in Figs 709, 717; anterior epigynal plate simple, weakly curved, dark internal ‘valve’ visible through cuticle (greenish in ethanol); without posterior plate. Internal genitalia as in Figs 710, 720, with pair of roughly triangular pore-plates converging anteriorly.

Natural history. This species was found deep in the leaf litter, in small cavities of the ground rather than on the underside of dead leaves like the syntopic C. agilis. When disturbed, the spiders tried to hide even deeper rather than to run away.

Distribution. Known from type locality in Pernambuco state (Brazil) only (Fig. 743).