Mesabolivar similis Huber 2018, sp. n.
Creators: name: Huber, Bernhard A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Mesabolivar
Mesabolivar similis

description: Mesabolivar similis sp. n.
Figs 141–142, 165–171, 194
Diagnosis. Distinguished from most known congeners by armature of male chelicerae (Figs 165–166; two pairs of frontal apophyses, one oblique pair distally and one smaller conical pair proximally), by shape of procursus (Figs 167–169; in general as in M. togatus, cf. Huber 2000: fig. 856; widely curved, with distal prolateral process and membranous structures), and by shape of epigynum (Figs 170; in lateral view like M. togatus, cf. Huber 2000: fig. 862; oval anterior plate with posterior margin divided into three lobes by whitish membrane); from two most similar congeners (M. togatus, M. baianus) by much smaller proximal cheliceral apophyses (Figs 165–166); from M. baianus also by shapes of lobes on anterior epigynal plate (median lobe wider; lateral lobes narrower; Figs 170, 194).
Etymology. The specific name refers to the similarity of this species to M. togatus; adjective.
Type material. BRAZIL: Bahia: ♂ holotype, UFMG (21509), 1♂ 1♀ (♀ abdomen only, prosoma in pure ethanol) paratypes, ZFMK (Ar 19039), Fazenda Morro de Pedra (12°31.6’–31.8’S, 40°36.1–36.4’W), 490 m a.s.l., 14.v.2015 (B.A. Huber, L.S. Carvalho).
Other material examined. BRAZIL: Bahia: 2♀ (one ♀ abdomen with ♂ paratype) in pure ethanol, ZFMK (Br15-182), same data as types. 2♂ 1 ♀ in pure ethanol, UFPI (ARA 278), Maracás, near Sede da Ferbasa (13.471°S, 40.438°W), 955 m a.s.l., 11–13.iii.2012 (E. Araújo, A. Medeiros).
Description. Male (holotype)
MEASUREMENTS. Total body length 4.5, carapace width 1.7. Distance PME-PME 125 µm, diameter PME 170 µm, distance PME-ALE 130 µm, distance AME-AME 30 µm, diameter AME 65 µm. Sternum width/length: 1.0/ 0.67. Leg 1 missing, tibia 2: 11.1, tibia 3: 6.4, tibia 4: 10.0. Femora 1–4 width (at half length): –, 0.26, 0.26, 0.19.
COLOR (in ethanol). Carapace ochre-yellow, with wide dark brown median mark including posterior part of ocular area, no lateral marks; clypeus not darkened; sternum orange to light brown; legs brown, tips of femora and tibiae lighter, indistinct darker rings on femora (subdistally) and tibiae (proximally and subdistally); abdomen greenish gray, dorsally and laterally densely covered with dark bluish marks, ventrally with orange to light brown plate in front of gonopore, very indistinct plate in front of spinnerets.
BODY. Habitus as in Fig. 141; ocular area raised; carapace with distinct median furrow; clypeus unmodified; sternum unmodified.
CHELICERAE. With two pairs of frontal apophyses, proximal pair small and conical, distal pair oblique, angle between outer margins ~100° (Figs 165–166).
PALPS. In general like in M. togatus (cf. Huber 2000: figs 855–856); palps in these two species may be indistinguishable (the minimal differences between Figs 158–159 and Figs 167, 169 may partly be due to slightly different angles of view and may be in the same order of magnitude as intraspecific variation).
LEGS. Without spines, without curved hairs, few vertical hairs.
Male (variation). Other male lighter, slightly smaller; carapace width: 1.3; leg 1: 57.3 (13.5 + 0.7 + 12.9 + 27.1 + 3.1), tibia 2: 9.3, tibia 3: 6.3, tibia 4: 9.1.
Female. In general similar to male (Fig. 142). Tibia 1: 8.5 (missing in second female). Epigynum as in Figs 170, 194, very similar to M. togatus, especially to females from Bahia assigned tentatively to M. togatus (compare Figs 190 and 194). Internal genitalia as in Fig. 171, also very similar M. togatus (compare Figs 171 and 189).
Natural history. The spiders were found in large sheltered spaces among rocks and logs.
Distribution. Known from two localities in Bahia state (Brazil) (Fig. 727).
description: Published as part of Huber, Bernhard A., 2018, The South American spider genera Mesabolivar and Carapoia (Araneae, Pholcidae): new species and a framework for redrawing generic limits, pp. 1-178 in Zootaxa 4395 (1) on page 45, DOI: 10.11646/zootaxa.4395.1.1, http://zenodo.org/record/1202519