Mesabolivar murici

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: 81-83

publication ID

https://doi.org/10.11646/zootaxa.4395.1.1

publication LSID

lsid:zoobank.org:pub:B43C234D-45C4-4A6D-9836-8A7524A5B291

persistent identifier

http://treatment.plazi.org/id/160AC713-C624-FFD7-2A9C-9E8E360F78E9

treatment provided by

Plazi

scientific name

Mesabolivar murici
status

sp. n.

Mesabolivar murici  sp. n.

Figs 319View FIGURES 315–326, 327–333View FIGURES 327–333, 346–348View FIGURES 340–351

Diagnosis. Distinguished from known congeners by distal elements of procursus ( Figs 327–328, 331View FIGURES 327–333; subdistal heavily sclerotized elements and distal partly membranous process), by armature of male chelicerae ( Figs 329–330View FIGURES 327–333; large proximal whitish processes and pointed apophyses distally near median line) and shape of epigynum ( Figs 332View FIGURES 327–333, 346View FIGURES 340–351; simple anterior plate with median pocket and lateral whitish areas, large posterior plate).

Etymology. The specific name is derived from the type locality; noun in apposition.

Type material. BRAZIL: Alagoas: ♂ holotype, 1♀ paratype, UFMGAbout UFMG (21514–15), 9♂ 10♀ paratypes, ZFMKAbout ZFMK (Ar 19162), 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).

Other material examined. BRAZIL: Alagoas: 2♂ 4♀, ZFMKAbout ZFMK ( Ar 19163), same locality as types but at 9°15.0’S, 35°51.2’W, 200 m a.s.l., 19.v.2015 (B.A. Huber, L.S. Carvalho)GoogleMaps  . 2♀, ZFMKAbout ZFMK (Ar 19164), 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)  . 2♂ 1♀, ZFMKAbout ZFMK (Ar 19165), 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 

Pernambuco: 4♂ 5♀, ZFMKAbout ZFMK (Ar 19166), 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  ; 1♀ in pure ethanol, ZFMKAbout ZFMK (Br 15-218), same dataGoogleMaps  . 3♂ 2♀, ZFMKAbout ZFMK (Ar 19167), near Bonito, Alto da Serra (8°30.7’S, 35°34.3’W), at buildings, 750–800 m a.s.l., 24–25.v.2015 (B.A. Huber, L.S. Carvalho).GoogleMaps 

Description. Male (holotype)

MEASUREMENTS. Total body length 5.2, carapace width 2.4. Distance PME-PME 190 µm, diameter PME 190 µm, distance PME-ALE 150 µm, distance AME-AME 50 µm, diameter AME 90 µm. Sternum width/length: 1.65/ 0.90. Leg 1: 72.2 (18.8 + 0.9 + 17.5 + 29.6 + 3.5), tibia 2: 12.7, tibia 3: 9.7, tibia 4: 11.5; tibia 1 L/d: 80. Femora 1– 4 width (at half length): 0.39, 0.39, 0.38, 0.35.

COLOR (in ethanol). Carapace ochre, with large dark median mark including ocular area; clypeus not darker; sternum ochre-yellow, slightly darker medially; legs dark brown, femora and tibiae distally lighter; abdomen greenish gray, dorsally and laterally with dark internal marks, ventrally with orange area in front of gonopore and ochre-yellow area in front of spinnerets.

BODY. Habitus as in Fig. 319View FIGURES 315–326; ocular area weakly raised; carapace with deep median furrow; clypeus unmodified; sternum unmodified.

CHELICERAE. With large proximal whitish processes and pointed apophyses distally near median line ( Figs 329–330View FIGURES 327–333).

PALPS. As in Figs 327–328View FIGURES 327–333; coxa with retrolateral apophysis; trochanter barely modified; femur with retrolateral process proximally, distally ventrally widening; tibia distally ventrally with rounded process; tarsus with retrolatero-dorsal processes carrying tarsal organ; procursus proximally simple, distally complex and distinctive, with apparently hinged prolateral element; genital bulb with large tapering process partly sclerotized.

LEGS. Densely covered with short hairs, with many short spines on femora and tibiae 1–3 on all sides (very few spines dorsally); without curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 2.5%; prolateral trichobothrium present on tibia 1; tarsus 1 with>40 pseudosegments, distally fairly distinct.

Male (variation). Tibia 1 in 18 other males: 13.2–18.3 (mean 15.7). Smallest males with very few spines on legs.

Female. In general similar to male, also with spines on legs, especially on femora and tibiae 1–2. Tibia 1 in 23 females: 11.3–15.9 (mean 13.8). Epigynum as in Figs 332View FIGURES 327–333, 346View FIGURES 340–351; anterior plate with small median process at anterior margin, with pocket and distinctive whitish lateral areas; posterior plate very large. Internal genitalia as in Figs 333View FIGURES 327–333, 347–348View FIGURES 340–351, with large roundish pore-plates and distinctive median structure.

Natural history. The spiders were found in cavities along road cuts and among tree roots close to the ground. On a large bamboo, the webs reached up to ~ 1 m above the ground.

Distribution. Known from several localities in Alagoas and Pernambuco states ( Brazil) ( Fig. 734View FIGURE 734).

UFMG

Universidade Federal de Minas Gerais

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig