Mesabolivar murici, Huber, 2018

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

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Mesabolivar murici

sp. n.

Mesabolivar murici sp. n.

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

Diagnosis. Distinguished from known congeners by distal elements of procursus ( Figs 327–328, 331 View FIGURES 327–333 ; subdistal heavily sclerotized elements and distal partly membranous process), by armature of male chelicerae ( Figs 329–330 View FIGURES 327–333 ; large proximal whitish processes and pointed apophyses distally near median line) and shape of epigynum ( Figs 332 View FIGURES 327–333 , 346 View 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, UFMG (21514–15), 9♂ 10♀ paratypes, 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♀, 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♀, 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♀, 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♀, 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, ZFMK (Br 15-218), same data GoogleMaps . 3♂ 2♀, 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. 319 View 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 329–330 View FIGURES 327–333 ).

PALPS. As in Figs 327–328 View 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 332 View FIGURES 327–333 , 346 View 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 333 View FIGURES 327–333 , 347–348 View 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. 734 View FIGURE 734 ).


Universidade Federal de Minas Gerais


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