Mesabolivar iguazu Huber, 2000

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: 96-98

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-C62B-FFE4-2A9C-9CF036327B79

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Plazi

scientific name

Mesabolivar iguazu Huber, 2000
status

 

Mesabolivar iguazu Huber, 2000 

Figs 382–383View FIGURES378–389, 408–410View FIGURES408–418, 437–438View FIGURES 433–446

Mesabolivar iguazu Huber, 2000: 215  ; figs 138, 830–839 (♂ ♀, Argentina, Brazil). Huber 2014: 139 (except specimens from Puerto Libertad and Arroyo Uruguay km 30; see M. chapeco  ).

Diagnosis. (amendments; see Huber 2000). Distinguished from similar congeners ( M. uruguayensis  , M. chapeco  , M. yucuma  ) by long proximal processes on male chelicerae (Huber 2000: fig. 834; similar in M. chapeco  , where the distal apophyses are much less prominent in lateral view); also by male procursus ( Figs 408–410View FIGURES408–418; distinctive distal sclerotized and membranous elements), and by shape of epigynum ( Figs 437–438View FIGURES 433–446 and Huber 2000: figs 837– 838; anterior plate with pair of processes and pocket at posterior margin; similar M. charrua  and M. yucuma  ).

Type material. ARGENTINA: Misiones: ♂ holotype, AMNHAbout AMNH, Parque Nacional Iguazú [25.66°S, 54.47°W], 206 m a.s.l., palm forest, 8.xii.1990GoogleMaps  – 6.i.1991 (S. & J. Peck).

New records. ARGENTINA: Misiones: 5♂ 18♀, MACNAbout MACN ( Ar 19974), Parque Nacional Iguazú, Área Cataratas [25°40.7’S, 54°26.9’W], 4.ix.1963 (collector not given)GoogleMaps  ; 7♂ 6♀, MACNAbout MACN ( Ar 4313), same locality, xi.1954 (Schiapelli, De Carlo)GoogleMaps  ; 1♂, MACNAbout MACN ( Ar 20052), same locality, 16.viii.1959 (Nuñez)GoogleMaps  ; 1♂ 1♀, MACNAbout MACN ( Ar 20016), same locality, 13.i.1966 (Galiano)GoogleMaps  ; 1♀, ZIMGAbout ZIMG (II-28332), same locality, 1.iii.2012 (G. Rubio)GoogleMaps  . 1♀, MACNAbout MACN ( Ar 20088), Parque Nacional Iguazú, Área Cataratas, Sendero Macuco, 15.vii.1993 (M. di Vitteti)  ; 1♂, MACNAbout MACN ( Ar 20086), same locality, 8–15.ii.1995 (M.J. Ramirez)  ; 1♂ 2♀, MACNAbout MACN ( Ar 22113–15), same locality, 18–21.i.2005 (C. Grismado et al.)  . 1♂ 1♀, ZIMGAbout ZIMG (II-28333–34), same locality, 24.ii.2012 (P. Michalik)  . 1♀ 2 juvs, MACNAbout MACN (Ar 4017), Parque Nacional Iguazú , x.1950 (Schiapelli, De Carlo)  ; 4♂ 2♀, MACNAbout MACN ( Ar 20077), same locality, 8– 15.ii.1995 (M.J. Ramirez)  ; 1♂, MACNAbout MACN ( Ar 20107), same locality, vii.1983 (P.A. Goloboff)  ; 2♂ 2♀, MACNAbout MACN ( Ar 20079), same locality, vii.1985 (M. Ramirez)  . 1♀, MACNAbout MACN (Ar 20096), Parque Nacional Iguazú, Palmital, 5 km W Yacuí [25°40’S, 54°12’W], 8–15.ii.1995 (M.J. Ramirez)GoogleMaps  . 1♀, MACNAbout MACN (separated from Ar 20049), Parque Nacional Iguazú, Ruta National 101 y Arroyo Yacuí [25°40.8’S, 54°10.1’W, 230 m], i.1966 (Galiano)GoogleMaps  . 1♂, ZIMGAbout ZIMG (28335), Parque Nacional Iguazú, “ Apepu ”, 29.ii.2012 (collector not given)  . 1♂, MACNAbout MACN (separated from Ar 19971), Parque Provincial Cruce Caballero , NE San Pedro [~ 26.5°S, 54°W, 500 m], 27–29.x.1995 (M. Ramirez)  . 1♂, MACNAbout MACN (Ar 20091), Parque Provincial Uruguaí [25°52’S, 54°34’W, 200 m], Refugio Caá-Porá, 3 km W Deseado , 14– 15.ii.1995 (M. Ramirez)GoogleMaps  . 1♂, MACNAbout MACN (Ar 4314), Departamento Frontera, San Antonio [26°03’S, 53°44’W, 530 m], Refugio Piñalitos , ix.1954 (Schiapelli, De Carlo)GoogleMaps  . 1♂, MACNAbout MACN ( Ar 4046), Departamento Frontera, Tobuna [26°28’S, 53°53’W, 580 m], ii.1952 (M. Partridge).GoogleMaps 

BRAZIL: Paraná: 29♂ 15♀, ZFMKAbout ZFMK (Ar 19181), Foz do Iguaçu National Park (25.63– 25.69°S, 54.43– 54.44°W), 200–230 m a.s.l., 31.x.2014 (B.A. Huber, L.S. Carvalho)GoogleMaps  ; 1♂ 2♀ 1 juv. in pure ethanol, ZFMKAbout ZFMK (Br 14- 205), same dataGoogleMaps  . 17♂ 15♀ 3 juvs, ZFMKAbout ZFMK (Ar 19182–83), Foz do Iguaçu National Park, near Céu Azul (25.130°S, 53.823°W to 25.149°S, 53.807°W), 620–690 m a.s.l., 2.xi.2014 (B.A. Huber, L.S. Carvalho)GoogleMaps  ; 2♀ in pure ethanol, ZFMKAbout ZFMK (Br 14-208), same dataGoogleMaps  .

Description (amendments; see Huber 2000). Tibia 1 in 65 newly examined males: 7.6–12.1 (mean 10.5). Femora 2 and 3 in some males clearly wider than other femora, in others barely wider (e.g., diameters of femora in small male: 0.19, 0.21, 0.21, 0.19; in large male: 0.30, 0.37, 0.35, 0.31). Legs densely covered with short hair, tibiae dorsally with single row of long hairs. Prolateral trichobothrium present on tibia 1. Proximal cheliceral processes vary slightly in diameter (even among specimens from a single collecting event) but are consistently long.

Females in general similar to males but all femora same diameter; tibia 1 in 50 females: 5.6–9.3 (mean 7.6). Epigynum humps vary slightly in shape (in lateral view), even within samples from a single collecting event.

Natural history. The spiders were found in domed webs close to the ground. When disturbed, they started swinging with large amplitude and ran back into the protective shelter.

Distribution. Known from several localities in the Iguazu Falls area ( Argentina, Brazil) ( Fig. 737View FIGURES 736–737).

AMNH

American Museum of Natural History

MACN

Museo Argentino de Ciencias Naturales Bernardino Rivadavia

ZIMG

Zoologisches Institut und Museum Greifswald

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Mesabolivar

Loc

Mesabolivar iguazu Huber, 2000

Huber, Bernhard A. 2018

2018
Loc

M. chapeco

Huber 2018

2018
Loc

Mesabolivar iguazu

Huber 2000: 215

2000