Ibotyporanga payaya Huber sp. nov.

urn:lsid:zoobank.org:act: 0E6F5ADF-E85F-4C0E-AC40-FD6788F3E1CE

Figs 96, 101–104; SEM Figs 2G, 3A–B, 4F, 5D, 6D, 8E–F, 12A–B, 13E, 14E, 16E, 18G

Diagnosis

Distinguished from similar congeners (with split procursus with long dorsal branch; long male palpal patella, i.e., dorsally>1.8 ×as long as medially wide; and sclerite in female internal genitalia) by combination of: procursus main branch and dorsal branch proximally overlapping, i.e., without space between them in lateral view (Fig. 102C); male palpal tarsus without dorsal hump or process; epigynum not particularly wide (width/length <1.9); and median sclerite in female internal genitalia with posterior narrowing (‘neck’) (Fig. 103C). Distinguished from very similar I. emekori by longer cheliceral apophysis (compare Figs 99B and 103B), thinner main branch of procursus proximally (compare Figs 98A and 102A), and wider prolateral sclerite on bulbous part of genital bulb (compare Figs 98D and 102D); females of these two species may be indistinguishable morphologically. Distinguished from the very similar I. atikum sp. nov. also by main procursus branch in dorsal view wider (compare Figs 102B and 110B) and epigynal pocket straighter and indistinct (compare Figs 103C and 111C).

Etymology

The species name honors the Payayá, an indigenous people of Brazil that lives in Bahia; noun in apposition.

Type material

Holotype

BRAZIL – Bahia • ♂; SE of Bom Jesus da Lapa, ‘site 1’; 13.4398° S, 43.1643° W; 520 m a.s.l.; 18 Nov. 2022; B.A. Huber and L.S. Carvalho leg.; CHNUFPI 5951.

Paratypes

BRAZIL – Bahia • 4 ♂♂; same collection data as for holotype; CHNUFPI 5952 • 1 ♂, 1 ♀; same collection data as for holotype; UFMG 31658 • 1 ♂, 1 ♀; same collection data as for holotype; CHNUFPI 9046 [deposited in ZFMK Ar 24377] • 1 ♂, 1 ♀; same collection data as for holotype; CHNUFPI 5953 .

Other material examined

BRAZIL – Bahia • 2 ♂♂, 3 ♀♀, in pure ethanol; same collection data as for holotype; CHNUFPI 5954 [deposited in ZFMK Br22-192; one female abdomen transferred to ZFMK Ar 24377; 1 ♂, 1 ♀ used for SEM] • 1 ♀, in pure ethanol; same collection data as for holotype but ‘site 2’, 13.4383° S, 43.1645° W; 480 m a.s.l.; CHNUFPI 5955 [deposited in ZFMK Br22-193] .

Description

Male (holotype)

MEASUREMENTS. Total body length 2.0, carapace width 0.75. Distance PME–PME 55 µm; diameter PME 70 µm; distance PME–ALE 20 µm; distance AME–AME 15 µm; diameter AME 45 µm. Leg 1: 4.25 (1.13+0.27 +1.10 +1.30 + 0.45), tibia 2: 0.90, tibia 3: 0.85, tibia 4: 1.28; tibia 1 L/d: 11; diameters of leg femora 0.17–0.18; of leg tibiae 0.10.

COLOUR (in ethanol). Prosoma and legs ochre-yellow, carapace medially with darker band; legs without darker rings; abdomen gray with many darker internal marks; ventrally with light ochre plates in front of gonopore and in front of spinnerets.

BODY. Habitus as in I. emekori (cf. Fig. 73D). Ocular area slightly raised. Carapace with distinct but shallow thoracic groove (Fig. 3A). Clypeus with sclerotized rim with median notch. Sternum wider than long (0.52/0.44), with very low and indistinct anterior processes near coxae 1 not different from those in female. Abdomen globular; gonopore with four epiandrous spigots in two groups (Fig. 4F); spinnerets as in congeners (Figs 6D, 8E).

CHELICERAE. As in Fig. 103A–B; width 0.30; with long median frontal apophysis; stridulatory files very fine and poorly visible in dissecting microscope.

PALPS. As in Fig. 101; coxa unmodified; trochanter with short ventral process; femur proximally with distinct retrolateral process slightly directed toward distal, with prolateral stridulatory pick, distally widened but unmodified; femur-patella joints not shifted toward one side; patella dorsally ~2.0 × as long as medially wide; tibia with two trichobothria in relatively proximal position; tibia-tarsus joints slightly shifted toward retrolateral side; tarsus with small capsulate tarsal organ (Fig. 13E), without dorsal process; procursus (Fig. 102A–C) with long dorsal branch distally curved towards prolateral, main branch with light prolateral band, with short subdistal side-branch (Fig. 12A–B), distally transparent and curved towards prolateral; genital bulb (Fig. 102D–F) with distinct prolateral sclerite on bulbous part, embolus very simple, with indistinct processes.

LEGS. Without spines but with longer hairs ventrally on femora; without curved hairs; with short vertical hairs on tibiae 1 and 2 (Fig. 16E); retrolateral trichobothrium of tibia 1 at 60%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~3–4 pseudosegments, only distally distinct.

Variation (male)

Tibia 1 in ten males (incl. holotype): 1.00–1.17 (mean 1.10).

Female

In general, similar to male but clypeus unmodified, leg tibiae with few vertical hairs. Tibia 1 in seven females: 1.03–1.20 (mean 1.07). Epigynum (Fig. 104A) anterior plate trapezoidal to semicircular, posterior margin straight to weakly indented, with indistinct and shallow anterior pocket (Fig. 5D); posterior plate large but simple. Internal genitalia (Figs 103C, 104B–D) with pair of elongated pore plates posteriorly, median sclerite with posterior constriction, and very thin-walled large anterior expandable membranous sac.

Distribution

Known from type locality only, in Brazil, Bahia (Fig. 96A).

Natural history

Most specimens were found under rocks and in dead pieces of wood in an arboreous caatinga neighboring a large granite outcrop. The granite outcrop itself was occupied by two other species of Ninetinae tentatively placed in Kambiwa . One single female was found at the neighboring roadside, in the leaf litter among low shrubs and grasses. This site was mainly occupied by a different species of Ibotyporanga, I. atikum sp. nov., and we cannot confidently dismiss the possibility that this single female got mislabeled and also originated from the first site.