Ibotyporanga camarai Huber sp. nov.

urn:lsid:zoobank.org:act: 7B8BAD09-C01C-4F8E-95E2-9C9B089E22F6

Figs 42, 55A–B, 56–59

Diagnosis

Males are easily distinguished from all known congeners by shape of procursus (Fig. 57A–C; short, proximally strongly curved, distally with slender semitransparent tip curved towards dorsal); also by distinctive prolateral apophysis on embolus (arrows in Fig. 57D–E). Females differ from known congeners by internal genitalia with distinctive transversal membranous structure and large, apparently non-expandable membranous sac (Figs 58C, 59B–C).

Etymology

The species name honors Hélder Câmara (1909–1999), informally called the “bishop of the slums”, who served as a Brazilian archbishop from 1964 to 1985, opposing the military dictatorship.

Type material

Holotype

BRAZIL – Pernambuco • ♂; NE of Petrolina; 9.1957° S, 40.3832° W; 440 m a.s.l.; 30 Nov. 2022; B.A. Huber and A.S. Michelotto leg.; CHNUFPI 5891.

Paratype

BRAZIL – Pernambuco • 1 ♂; same collection data as for holotype; CHNUFPI 5892 [deposited in ZFMK Ar 24356] .

Other material examined

BRAZIL – Pernambuco • 1 ♂, 1♀, in pure ethanol; same collection data as for holotype; CHNUFPI 5893 [deposited in ZFMK Br22-243; female abdomen cleared and transferred to ZFMK Ar 24256] .

Description

Male (holotype)

MEASUREMENTS. Total body length 2.0, carapace width 0.80. Distance PME–PME 70 µm; diameter PME 85 µm; distance PME–ALE 25 µm; distance AME–AME 15 µm; diameter AME 65 µm. Leg 1: 4.60 (1.27+0.30 +1.13 +1.43 + 0.47), tibia 2: 0.92, tibia 3: 0.83, tibia 4: 1.20; tibia 1 L/d: 10; diameters of leg femora 0.17–0.18, of leg tibiae 0.11.

COLOUR (in ethanol). Prosoma and legs mostly ochre-yellow, carapace medially with brown mark including ocular area, legs with indistinct dark rings on femora (subdistally) and tibiae (proximally and subdistally); abdomen pale gray with dark internal marks dorsally and laterally; ventrally with light ochre plates in front of gonopore and in front of spinnerets.

BODY. Habitus as in Fig. 55A. Ocular area slightly raised. Carapace with distinct but shallow thoracic groove. Clypeus with sclerotized rim with median notch. Sternum wider than long (0.54/0.44), with pair of very low and indistinct anterior processes near coxae 1. Abdomen globular.

CHELICERAE. As in Fig. 58A–B; width 0.31; with strong median frontal apophysis; stridulatory files fine but clearly visible in dissecting microscope.

PALPS. As in Fig. 56; coxa unmodified; trochanter with rounded prolateral-ventral protrusion; femur proximally with prominent retrolateral process not directed toward distal, with prolateral stridulatory pick, distally widened but unmodified; femur-patella joints not shifted toward one side; patella dorsally slightly longer than medially wide; tibia-tarsus joints not shifted toward one side; tarsus with low and indistinct dorsal process; procursus (Fig. 57A–C) with light prolateral band, distally with membranous element curved towards dorsal and small subdistal process; genital bulb (Fig. 57D–F) with distinct prolateral sclerite on bulbous part, with distinctive apophysis and membranous structures on embolus.

LEGS. Without spines but with longer and slightly stronger hairs ventrally on femora; without curved hairs; with several rows of short vertical hairs on tibia 1; retrolateral trichobothrium of tibia 1 at 58%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~3–4 pseudosegments, distally distinct.

Variation (male)

Dark rings on legs distinct in other males. Tibia 1 in two other males: 1.03, 1.13.

Female

In general, similar to male (Fig. 55B) but slightly darker; clypeus unmodified; tibia 1 with few vertical hairs; tibia 1 length: 1.15. Epigynum (Fig. 59A) anterior plate oval to trapezoidal, posterior margin almost straight, with weakly curved, shallow anterior pocket; posterior plate short and simple. Internal genitalia (Figs 58C, 59B–C) with pair of pore plates, with distinctive transversal membranous structure and large, apparently non-expandable membranous sac.

Distribution

Known from type locality only, in Brazil, Pernambuco (Fig. 42).

Natural history

The spiders were found on the border between a bare rock outcrop and the neighboring thorny woodland. The three males were found under dead bark on the ground; the female was found under a stone.