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

description: Mesabolivar buraquinho sp. n.
Figs 143–144, 178–185, 197
Diagnosis. Distinguished from most known congeners by shape of procursus (Figs 179–181; widely curved, slender tip with prolateral apophysis), by armature of male chelicerae (Fig. 182; pair of large frontal apophyses near median line and pair of small apophyses more proximally), and by shape of epigynum (Fig. 184; trapezoidal anterior plate with dark central depression); from most similar known species (M. caipora) only by cheliceral armature (compare Fig. 182 and Huber 2015: fig. 54); epigyna of M. buraquinho and M. caipora almost identical, but median depression apparently consistently slightly smaller in M. buraquinho; compare Figs 184 and 186).
Etymology. The specific name is derived from the type locality; noun in apposition.
Type material. BRAZIL: Paraíba: ♂ holotype, 1♀ paratype, UFMG (21510–11), 11♂ 13♀ paratypes, ZFMK (Ar 19041–42), Jardim Botânico Benjamin Maranhão, "Mata do Buraquinho" (7°08.31’S, 34°51.46’W), 30 m a.s.l., 2.vi.2015 (B.A. Huber, L.S. Carvalho).
Other material examined. BRAZIL: Paraíba: 2 juvs, together with paratypes; 1♀ 2 juvs in pure ethanol, ZFMK (Br 15-246), same data as types. 1♂ 3♀, ZFMK (Ar 19043), Mata do Cafundó, ‘site 1’ (7°08.8’S, 35°00.6’W), 80 m a.s.l., 1.vi.2015 (B.A. Huber, L.S. Carvalho); 1♀ 1 juv. in pure ethanol, ZFMK (Br 15-243), same data. 10♂ 7♀, ZFMK (Ar 19044), Floresta Nacional da Restinga de Cabedelo, " Mata do Amém " (7°03.9’S, 34°51.2’W), 30 m a.s.l., 2.vi.2015 (B.A. Huber, L.S. Carvalho); 2 juvs in pure ethanol, ZFMK (Br 15-251), same data. 13♂ 8♀, ZFMK (Ar 19045), near Rio Tinto, Reserva Biológica de Guaribas, ‘site 1’ (6°48.55’S, 35°05.21’W), 30 m a.s.l., 3.vi.2015 (B.A. Huber, L.S. Carvalho); 2 juvs in pure ethanol, ZFMK (Br 15-253), same data. 1♂ 3♀ 1 juv., ZFMK (Ar 19046), Reserva Biológica de Guaribas, ‘site 2’ (6°44.4’S, 35°09.6’W), 170 m a.s.l., 3.vi.2015 (B.A. Huber, L.S. Carvalho); 1♀ 2 juvs in pure ethanol, ZFMK (Br 15-256), same data.
Pernambuco: 4♂ 2♀, ZFMK (Ar 19047), near Bonito, forest near Cachoeira da Gruta (8°32.8’S, 35°42.7’W), 380 m a.s.l., 24–25.v.2015 (B.A. Huber, L.S. Carvalho). 2♂ 3♀, ZFMK (Ar 19048), near Bonito, Alto da Serra (8°30.7’S, 35°34.3’W), 750–800 m a.s.l., 24–25.v.2015 (B.A. Huber, L.S. Carvalho); 1♀ in pure ethanol, ZFMK (Br 15-224), same data. 5♂ 5♀, ZFMK (Ar 19049), Reserva Biológica de Saltinho (8°43.6’S, 35°10.7’W), 50 m a.s.l., 26.v.2015 (B.A. Huber, L.S. Carvalho); 1♀ in pure ethanol, ZFMK (Br 15-226), same data. 1♂ 8♀, ZFMK (Ar 19050), near São Vicente Ferrer, ‘site 1’, forest near road (7°37.3’S, 35°27.8’–28.0’W), 400–450 m a.s.l., 28.v.2015 (B.A. Huber, L.S. Carvalho); 1 juv. in pure ethanol, ZFMK (Br 15-232), same data.
Alagoas: 6♂ 1♀, ZFMK (Ar 19051), near Murici, degraded forest near road (9°19.64’S, 35°54.58’W), 140 m a.s.l., 17.v.2015 (B.A. Huber, L.S. Carvalho); 3♀ 1 juv. in pure ethanol, ZFMK (Br 15-193), same data. 2♂ 5♀, ZFMK (Ar 19052), near Murici, Estação Ecológica de Murici (9°14.8’S, 35°50.3’W), 350–400 m a.s.l., 18.v.2015 (B.A. Huber, L.S. Carvalho); 2♀ in pure ethanol, ZFMK (Br 15-200), same data. 8♂ 4♀, ZFMK (Ar 19053–54), Reserva Biológica de Pedra Talhada (9°14.5’–14.0’S, 36°26.5’–27.2’W), 650–700 m a.s.l., 20–21.v.2015 (B.A. Huber, L.S. Carvalho); 1♀ 1 juv. in pure ethanol, ZFMK (Br 15-212), same data. 1♂ 1♀, ZFMK (Ar 19055), Usina Serra Grande, forest above sugarcane plantations (8°58.3’S, 36°05.7’W), 450–550 m a.s.l., 22–23.v.2015 (B.A. Huber, L.S. Carvalho); 2♀ in pure ethanol, ZFMK (Br 15-216), same data.
Bahia: 2♂, ZFMK (Ar 19056), near Santa Teresinha, Serra da Jibóia, along small brook (12°50.68’S, 39°29.31’W), 500 m a.s.l., 13.v.2015 (B.A. Huber, L.S. Carvalho); 1♀ in pure ethanol, ZFMK (Br 15-175), same data. 1♂, ZFMK (Ar 19057), near Santa Teresinha, Serra da Jibóia, near hilltop (12°51.33’S, 39°28.59’W), 800 m a.s.l., 13.v.2015 (B.A. Huber, L.S. Carvalho). 2♂, ZFMK (Ar 19058), near Santa Teresinha, Reserva Jequitibá (12°52.19’S, 39°28.65’W), 530 m a.s.l., 13.v.2015 (B.A. Huber, L.S. Carvalho); 1♀ in pure ethanol, ZFMK (Br 15- 177), same data. 2♂ 3♀, ZFMK (Ar 19059), Reserva Ecológica da Michelin, ‘site 1’ (13°49.3’S, 39°11.9’W), ~ 140 m a.s.l., 5.x.2011 (B.A. Huber, A. Pérez-González, M. Alves Dias).
Description. Male (holotype)
MEASUREMENTS. Total body length 4.0, carapace width 1.6. Distance PME-PME 120 µm, diameter PME 140 µm, distance PME-ALE 120 µm, distance AME-AME 25 µm, diameter AME 60 µm. Sternum width/length: 1.05/0.65. Leg 1: 56.9 (14.0 + 0.7 + 13.9 + 25.2 + 3.1), tibia 2: 9.6, tibia 3: 5.6, tibia 4: 9.2; tibia 1 L/d: 107. Femora 1–4 width (at half length): 0.17, 0.23, 0.29, 0.18.
COLOR (in ethanol). Carapace ochre-yellow with large dark median mark including ocular area; sternum orange to light brown; legs dark brown, tips of femora and tibiae lighter (whitish to yellowish); abdomen greenish gray, dorsally and laterally densely covered with dark marks, ventrally with light orange-brown area in front of gonopore.
BODY. Habitus as in Fig. 143; ocular area raised; carapace with distinct median furrow; clypeus unmodified; sternum unmodified.
CHELICERAE. With two pairs of frontal apophyses (Figs 182–183), one pair large, rounded, near median line, other pair small, pointed, more proximally.
PALPS. As in Figs 178–179; apparently indistinguishable from M. caipora, but tip of procursus slightly wider (Figs 180, 181). Coxa with retrolateral apophysis; trochanter barely modified; femur with retrolateral apophysis proximally, widened distally; tarsus with small dorsal process; procursus widely curved, with narrow retrolateral flap, small prolateral apophysis, and membranous distal structures; bulb large, with long slightly tapering process, without side branch.
LEGS. Without spines, without curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 2%; prolateral trichobothrium present on tibia 1; tarsus 1 with>40 pseudosegments, distally fairly distinct.
Male (variation). Tibia 1 in 68 other males: 9.4–14.7 (mean 12.4).
Female. In general similar to male (Fig. 144) but all femora approximately same width. Tibia 1 in 59 females: 6.3–11.1 (mean 9.2). Epigynum as in Fig. 184; anterior plate simple, trapezoidal, slightly protruding but without processes, with dark, round to oval central depression; posterior plate large. Internal genitalia as in Figs 185, 197, with pair of large pore-plates in tent-shaped lateral position, converging anteriorly; arc-shaped ‘valve’ projects beyond anterior margin of epigynal plate (Fig. 185), in some females visible in ventral view through cuticle.
Natural history. The spiders were found in domed webs sheltered among rocks, in hollow trees, under logs, and in large cavities of the ground. At Mata do Amém, they seemed to share the microhabitat with M. spinulosus. Distribution. Widespread from Bahia state to Paraíba 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 pages 48-52, DOI: 10.11646/zootaxa.4395.1.1, http://zenodo.org/record/1202519