treatment provided by
Mesabolivar kaingang sp. n.
Diagnosis. Easily distinguished from known congeners by male procursus ( Figs 285, 287–288View FIGURES 284–291; small dorsal process, retrolateral ridge, prolateral pointed process); also by armature of male chelicerae ( Fig. 286View FIGURES 284–291; distal apophyses close to lamellae, small proximal processes) and shape of epigynum ( Figs 289–290View FIGURES 284–291, 304View FIGURES 292–305; oval, with posterior pocket on slightly projecting ‘scape’).
Etymology. The specific name honors the Kaingang, a Native American ethnic group spread out over the states of Paraná, Santa Catarina and Rio Grande do Sul and the southeastern state of São Paulo; noun in apposition.
Type material. BRAZIL: Paraná: ♂ holotype, 1♀ paratype, UFMG (21512–13), 10♂ 4♀ paratypes, ZFMK (Ar 19142), Saint-Hilaire/Lange National Park, forest above Hotel Mata Atlântica (25.670°S, 48.600°W), ~ 200– 300 m a.s.l., night collecting, 12.x.2014 (B.A. Huber, L.S. Carvalho).
Other material examined. BRAZIL: Paraná: 5♀ in pure ethanol, ZFMK (Br 14-140), same data as types . 3♂ 2♀, ZFMK (Ar 19143), Saint-Hilaire / Lange National Park , forest along river above Fazenda Niteroi (25.657°S, 48.601°W), ~ 100 m a.s.l., 11.x.2014 (B.A. Huber, L.S. Carvalho)GoogleMaps ; 1♂ 1♀ in pure ethanol, ZFMK (Br 14-133), same dataGoogleMaps . 4♂, SMNK ( ECS 756View Materials, 759View Materials), Reserva Natural do Rio Cachoeira [~ 23.38°S, 48.70°W], 19.xi./ 15.xii.2007 (F. Raub, L. Scheuermann).GoogleMaps
Santa Catarina: 2♀, ZFMK (Ar 19144), Itapoá, Reserva Volta Velha (26°05.8’S, 48°39.1’W), 20 m a.s.l., 27– 28.ix.2010 (B.A. Huber, J. Ricetti); 4 juvs in pure ethanolGoogleMaps , ZFMK (Br 10-68), same dataGoogleMaps .
Assigned tentatively. BRAZIL: Paraná: 3♂ 2♀, ZFMK (Ar 19145), São José dos Pinhais, Serro e Gemido (25°41.5’S, 49°03.4’W), ~ 1000 m a.s.l., in hollow trees, 25.ix.2010 (B.A. Huber, J. Ricetti)GoogleMaps ; 1♂ 1♀ in pure ethanol, ZFMK (Br 10-60), same dataGoogleMaps . 1♀ (and one ♂ palp and ♂ chelicerae transferred from ZFMK Br 10-58), ZFMK (Ar 19146), Rio Grande , Fazenda Experimental Gralha Azul (25°40.0’S, 49°16.2’W), 910 m a.s.l., 26.ix.2010 (B.A. Huber, J. Ricetti)GoogleMaps ; 1♂ 1♀ in pure ethanol, ZFMK (Br 10-58), same dataGoogleMaps .
Description. Male (holotype)
MEASUREMENTS. Total body length 4.7, carapace width 1.7. Distance PME-PME 160 µm, diameter PME 160 µm, distance PME-ALE 150 µm, distance AME-AME 30 µm, diameter AME 60 µm. Sternum width/length: 1.2/ 0.7. Leg 1: 61.2 (14.7 + 0.8 + 14.4 + 27.3 + 4.0), tibia 2: 10.8, tibia 3: 8.9, tibia 4: 9.3; tibia 1 L/d: 90. Femora 1–4 width (at half length): 0.23, 0.25, 0.25, 0.23.
COLOR (in ethanol). Carapace ochre-yellow, with large dark median mark including ocular area, clypeus not darker; sternum orange; 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 marks, ventrally pale greenish gray with small ochre-yellow area in front of gonopore and indistinct ochre-yellow area in front of spinnerets.
BODY. Habitus as in Fig. 259View FIGURES 253–260; ocular area raised; carapace with distinct median furrow; clypeus unmodified; sternum unmodified.
CHELICERAE. With distal apophyses close to lamellae, weakly projecting (not visible in lateral view), proximal processes very small ( Fig. 286View FIGURES 284–291).
PALPS. As in Figs 284–285View FIGURES 284–291; coxa with distinct retrolateral apophysis; trochanter barely modified; femur with hooked retrolateral apophysis proximally, distally widening; procursus with small dorsal process, distinctive retrolateral ridge and small prolateral pointed process ( Figs 285, 287–288View FIGURES 284–291); genital bulb with large tapering process mostly membranous.
LEGS. Densely covered with short hairs, without spines and curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 1.5%; prolateral trichobothrium present on tibia 1; tarsus 1 with>30 pseudosegments, distally fairly distinct.
Male (variation). Tibia 1 in 12 other males from Saint-Hilaire/Lange National Park: 13.1–16.4 (mean 14.4). Proximal cheliceral processes barely visible in some males. In males from near Curitiba (Serro e Gemido and Fazenda Experimental Gralha Azul) the proximal cheliceral processes are larger, and the procursus differs slightly (prolateral apophysis stronger, proximal part relatively more slender); specimens from these localities are therefore assigned tentatively; tibia 1 in males from Serro e Gemido: 12.9, 14.0, 15.3.
Female. In general similar to male ( Fig. 260View FIGURES 253–260). Tibia 1 in nine females from Saint-Hilaire/Lange National Park and Volta Velha: 10.6–14.1 (mean 12.4). Epigynum as in Figs 289–290View FIGURES 284–291, 304View FIGURES 292–305; simple oval anterior plate weakly projecting, without processes, with pocket at posterior margin; posterior plate short and wide. Internal genitalia as in Figs 291View FIGURES 284–291, 305View FIGURES 292–305, with pair of bean-shaped pore-plates converging anteriorly. In females from near Curitiba (Serro e Gemido and Fazenda Experimental Gralha Azul), the posterior margin of the epigynal plate is slightly straighter; they are assigned tentatively (tibia 1 in three females: 9.6, 11.7, 13.5).
Natural history. The spiders were found in large sheltered spaces among rocks and logs, and in hollow logs. At Saint-Hilaire/Lange National Park they shared the microhabitat with M. bicuspis . When disturbed they started swinging with large amplitude and high frequency but did not run away.
Distribution. Known from several sites in Paraná and Santa Catarina states ( Brazil) ( Fig. 733View FIGURES 732–733); western specimens (from near Curitiba) are assigned tentatively.
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