Mesabolivar buraquinho,

Huber, Bernhard A., 2018, The South American spider genera Mesabolivar and Carapoia (Araneae, Pholcidae): new species and a framework for redrawing generic limits, Zootaxa 4395 (1), pp. 1-178: 48-52

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Mesabolivar buraquinho

sp. n.

Mesabolivar buraquinho  sp. n.

Figs 143–144View FIGURES 138–149, 178–185View FIGURES 178–183View FIGURES 184–187, 197View FIGURES188–199

Diagnosis. Distinguished from most known congeners by shape of procursus ( Figs 179–181View FIGURES 178–183; widely curved, slender tip with prolateral apophysis), by armature of male chelicerae ( Fig. 182View FIGURES 178–183; pair of large frontal apophyses near median line and pair of small apophyses more proximally), and by shape of epigynum ( Fig. 184View FIGURES 184–187; trapezoidal anterior plate with dark central depression); from most similar known species ( M. caipora  ) only by cheliceral armature (compare Fig. 182View FIGURES 178–183 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 186View FIGURES 184–187).

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., (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., (B.A. Huber, L.S. Carvalho)GoogleMaps  ; 1♀ 1 juv. in pure ethanol, ZFMK (Br 15-243), same dataGoogleMaps  . 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., (B.A. Huber, L.S. Carvalho); 2 juvs in pure ethanol, ZFMK (Br 15-251), same dataGoogleMaps  . 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., (B.A. Huber, L.S. Carvalho); 2 juvs in pure ethanol, ZFMK (Br 15-253), same dataGoogleMaps  . 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., (B.A. Huber, L.S. Carvalho)GoogleMaps  ; 1♀ 2 juvs in pure ethanol, ZFMK (Br 15-256), same dataGoogleMaps  .

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)GoogleMaps  . 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)GoogleMaps  ; 1♀ in pure ethanol, ZFMK (Br 15-224), same dataGoogleMaps  . 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)GoogleMaps  ; 1♀ in pure ethanol, ZFMK (Br 15-226), same dataGoogleMaps  . 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)GoogleMaps  ; 3♀ 1 juv. in pure ethanol, ZFMK (Br 15-193), same dataGoogleMaps  . 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)GoogleMaps  ; 2♀ in pure ethanol, ZFMK (Br 15-200), same dataGoogleMaps  . 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)GoogleMaps  ; 2♀ in pure ethanol, ZFMK (Br 15-216), same dataGoogleMaps  .

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)GoogleMaps  ; 1♀ in pure ethanol, ZFMK (Br 15-175), same dataGoogleMaps  . 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)GoogleMaps  . 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)GoogleMaps  ; 1♀ in pure ethanol, ZFMK (Br 15- 177), same dataGoogleMaps  . 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).GoogleMaps 

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. 143View FIGURES 138–149; ocular area raised; carapace with distinct median furrow; clypeus unmodified; sternum unmodified.

CHELICERAE. With two pairs of frontal apophyses ( Figs 182–183View FIGURES 178–183), one pair large, rounded, near median line, other pair small, pointed, more proximally.

PALPS. As in Figs 178–179View FIGURES 178–183; apparently indistinguishable from M. caipora  , but tip of procursus slightly wider ( Figs 180, 181View FIGURES 178–183). 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. 144View FIGURES 138–149) but all femora approximately same width. Tibia 1 in 59 females: 6.3–11.1 (mean 9.2). Epigynum as in Fig. 184View FIGURES 184–187; anterior plate simple, trapezoidal, slightly protruding but without processes, with dark, round to oval central depression; posterior plate large. Internal genitalia as in Figs 185View FIGURES 184–187, 197View FIGURES188–199, with pair of large pore-plates in tent-shaped lateral position, converging anteriorly; arc-shaped ‘valve’ projects beyond anterior margin of epigynal plate ( Fig. 185View FIGURES 184–187), 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. 727View FIGURES726–729).


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