Ibotyporanga itatim Huber & Meng & Král & Ávila Herrera & Carvalho 2024, sp. nov.
Creators: name: Huber, Bernhard A.
name: Meng, Guanliang
name: Král, Jiří
name: Ávila Herrera, Ivalú M.
name: Carvalho, Leonardo S.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Ibotyporanga
Ibotyporanga itatim

description: Ibotyporanga itatim Huber sp. nov.
urn:lsid:zoobank.org:act: 849EB775-ABC9-47FB-87B7-C77FFB5B4E1E
Figs 22C, 25F–G, 32E–F, 42–46; SEM Figs 2C, 4C, 7F, 10C, 11B, 13B, 14B, 15E, 16B–C, 17D–E, 18B–C, 19F–G, 21B, D–E
Diagnosis
Males are easily distinguished from most known congeners by shape of procursus (Fig. 44A–C; short and simple, distally widened and membranous); from superficially similar species (I. bariro, I. walekeru sp. nov.) by strong dorsal process on palpal tarsus (arrow in Fig. 44C) and by longer legs (tibia 1>1.5, versus <1.1). Females are distinguished from known congeners by trapezoidal epigynum with triangular pocket (Fig. 45C; similar in I. xique sp. nov. and I. xakriaba sp. nov.) and by unique pair of distinct lateral sacs in internal genitalia (Fig. 46C–H).
Etymology
The species name is derived from the type locality; noun in apposition.
Type material
Holotype
BRAZIL – Bahia • ♂; W of Itatim; 12.7162° S, 39.7626° W; 300 m a.s.l.; 10 Nov. 2022; B.A. Huber and L.S. Carvalho leg.; CHNUFPI 5884.
Paratypes
BRAZIL – Bahia • 1 ♂, 4 ♀♀, 3 juvs; same collection data as for holotype; CHNUFPI 5885 • 1 ♂, 1 ♀; same collection data as for holotype; UFMG 31653 • 2 ♂♂, 2 ♀♀; same collection data as for holotype; CHNUFPI 9028 [deposited in ZFMK Ar 24354] • 1 ♂, 1♀; same collection data as for holotype; CHNUFPI 5886.
Other material examined
BRAZIL – Bahia • 1 ♂, 7 ♀♀, 1 juv., in pure ethanol; same collection data as for holotype; CHNUFPI 5887 [deposited in ZFMK Br22-148; 1 ♂, 1 ♀ used for SEM].
Description
Male (holotype)
MEASUREMENTS. Total body length 2.0, carapace width 0.83. Distance PME–PME 70 µm; diameter PME 85 µm; distance PME–ALE 25 µm; distance AME–AME 15 µm; diameter AME 60 µm. Leg 1: 5.93 (1.63+0.33 +1.60 +1.87 + 0.50), tibia 2: 1.33, tibia 3: 1.13, tibia 4: 1.57; tibia 1 L/d: 16; diameters of leg femora 0.19–0.20, of leg tibiae 0.10.
COLOUR (in ethanol). Prosoma and legs ochre-yellow, carapace medially with narrow brown mark including ocular area and clypeus; legs with brown rings on femora (subdistally) and tibiae (proximally and subdistally); abdomen gray with many dark internal marks dorsally and laterally; ventrally with ochre plates in front of gonopore and in front of spinnerets.
BODY. Habitus as in Fig. 25F. Ocular area slightly raised (Fig. 2C). Carapace with distinct but shallow thoracic groove. Clypeus with sclerotized rim with median notch. Sternum slightly wider than long (0.58/0.48), with very low and indistinct anterior processes near coxae 1 (not higher than in female). Abdomen globular; gonopore with four epiandrous spigots (Fig. 4C); spinnerets as in congeners (Fig. 7F).
CHELICERAE. As in Fig. 45A–B; width 0.33; with strong median frontal apophysis; stridulatory files (Fig. 10C) very fine and poorly visible in dissecting microscope.
PALPS. As in Fig. 43; coxa unmodified; trochanter with short rounded ventral protrusion; femur proximally with short retrolateral process not directed toward distal, with prolateral stridulatory pick, distally widened but unmodified; femur-patella joints not shifted toward one side; patella dorsally only slightly longer than medially wide; tibia-tarsus joints shifted toward retrolateral side; tarsus with small capsulate tarsal organ (Fig. 13B) and strong dorsal process; procursus (Fig. 44A–C) evenly curved, with light prolateral band, distally widened and semitransparent, with dorsal brush of pseudotrichia (Figs 11B, 32E–F; barely visible in dissecting microscope); genital bulb (Fig. 44D–F) with short but distinct prolateral sclerite on bulbous part, with simple embolus ending in two semitransparent tips.
LEGS. Without spines but with longer hairs ventrally on femora; without curved hairs; with many short vertical hairs on tibia 1 (Fig. 16B–C); retrolateral trichobothrium of tibia 1 at 54%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~3–4 pseudosegments, distally fairly distinct.
Variation (male)
Tibia 1 in seven males (incl. holotype): 1.60–1.83 (mean 1.69).
Female
In general, similar to male (Fig. 25G) but clypeus unmodified and tibiae with few short vertical hairs. Tibia 1 in 13 females: 1.30–1.50 (mean 1.42). Epigynum (Fig. 46A–B) anterior plate trapezoidal, posterior margin straight, with deep triangular anterior pocket; posterior plate wide and short. Internal genitalia (Fig. 46C–H) with pair of elongate pore plates and pair of distinct lateral membranous sacs; median membranes very thin and indistinct.
Distribution
Known from type locality only, in Brazil, Bahia (Fig. 42).
Natural history
The type locality is a granite outcrop with secondary shrubby caatinga (Fig. 22C). Most specimens were found by turning small rocks; a few specimens were collected from roof tiles piled up near a house. Two egg sacs had diameters of 1.8–2.0, were round and slightly flattened, and contained ~12– 15 eggs each, with an egg diameter of 0.58–0.60.
description: Published as part of Huber, Bernhard A., Meng, Guanliang, Král, Jiří, Ávila Herrera, Ivalú M. & Carvalho, Leonardo S., 2024, Diamonds in the rough: Ibotyporanga (Araneae, Pholcidae) spiders in semi-arid Neotropical environments, pp. 1-169 in European Journal of Taxonomy 963 on pages 50-54, DOI: 10.5852/ejt.2024.963.2687, http://zenodo.org/record/13963130