Mesabolivar kaingang

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: 73-76

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-C63C-FFCE-2A9C-9ACF301B7FDC

treatment provided by

Plazi

scientific name

Mesabolivar kaingang
status

sp. n.

Mesabolivar kaingang  sp. n.

Figs 259–260View FIGURES 253–260, 284–291View FIGURES 284–291, 304–305View FIGURES 292–305

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.

UFMG

Universidade Federal de Minas Gerais

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

SMNK

Staatliches Museum fuer Naturkunde Karlsruhe (State Museum of Natural History)

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Mesabolivar