Mesabolivar iguazu Huber, 2000: 215 M. chapeco The South American spider genera Mesabolivar and Carapoia (Araneae, Pholcidae): new species and a framework for redrawing generic limits Huber, Bernhard A. Zootaxa 2018 2018-03-19 4395 1 1 178 3ZXDY Huber, 2000 Huber 2000 [151,549,930,956] Arachnida Pholcidae Mesabolivar GBIF Animalia Araneae 95 96 Arthropoda species iguazu    Mesabolivar iguazuHuber, 2000: 215; figs 138, 830–839 ( ♂ ♀, Argentina, Brazil). Huber 2014: 139 (except specimens from Puerto Libertad and Arroyo Uruguaykm 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 408–410; distinctive distal sclerotized and membranous elements), and by shape of epigynum ( Figs 437–438and Huber 2000: figs 837– 838; anterior plate with pair of processes and pocket at posterior margin; similar  M. charruaand  M. yucuma).     Typematerial. ARGENTINA:  Misiones: ♂ holotype, AMNH, Parque Nacional Iguazú [ 25.66°S, 54.47°W],  206 ma.s.l., palm forest,  8.xii.1990– 6.i.1991(S. & J. Peck).    Newrecords. ARGENTINA:  Misiones: 5♂ 18♀, MACN( Ar19974), Parque Nacional Iguazú, Área Cataratas [ 25°40.7’S, 54°26.9’W],  4.ix.1963(collector not given);  7♂ 6♀, MACN( Ar4313), same locality,  xi.1954( Schiapelli, De Carlo);  1♂, MACN( Ar20052), same locality,  16.viii.1959( Nuñez);  1♂ 1♀, MACN( Ar20016), same locality,  13.i.1966( Galiano);  1♀, ZIMG(II-28332), same locality,  1.iii.2012( G. Rubio).  1♀, MACN( Ar20088), Parque Nacional Iguazú, Área Cataratas, Sendero Macuco,  15.vii.1993( M. di Vitteti);  1♂, MACN( Ar20086), same locality,  8–15.ii.1995( M.J. Ramirez);  1♂ 2♀, MACN( Ar22113–15), same locality,  18–21.i.2005( C. Grismado et al.).  1♂ 1♀, ZIMG(II-28333–34), same locality,  24.ii.2012( P. Michalik).  1♀2 juvs, MACN( Ar4017), Parque Nacional Iguazú,  x.1950( Schiapelli, De Carlo);  4♂ 2♀, MACN( Ar20077), same locality,  8– 15.ii.1995( M.J. Ramirez);  1♂, MACN( Ar20107), same locality,  vii.1983( P.A. Goloboff);  2♂ 2♀, MACN( Ar20079), same locality,  vii.1985( M. Ramirez).  1♀, MACN( Ar20096), Parque Nacional Iguazú, Palmital, 5 kmW Yacuí[ 25°40’S, 54°12’W],  8–15.ii.1995( M.J. Ramirez).  1♀, MACN(separated from Ar20049), Parque Nacional Iguazú, Ruta National 101 y Arroyo Yacuí[ 25°40.8’S, 54°10.1’W,  230 m],  i.1966( Galiano).  1♂, ZIMG(28335), Parque Nacional Iguazú, “ Apepu”,  29.ii.2012(collector not given).  1♂, MACN(separated from Ar19971), Parque Provincial Cruce Caballero, NE San Pedro[~ 26.5°S, 54°W,  500 m],  27–29.x.1995( M. Ramirez).  1♂, MACN( Ar20091), Parque Provincial Uruguaí[ 25°52’S, 54°34’W,  200 m], Refugio Caá-Porá, 3 kmW Deseado,  14– 15.ii.1995( M. Ramirez).  1♂, MACN( Ar4314), Departamento Frontera, San Antonio [ 26°03’S, 53°44’W,  530 m], Refugio Piñalitos,  ix.1954( Schiapelli, De Carlo).  1♂, MACN( Ar4046), Departamento Frontera, Tobuna [ 26°28’S, 53°53’W,  580 m],  ii.1952( M. Partridge).    BRAZIL:  Paraná: 29♂ 15♀, ZFMK( Ar19181), Foz do Iguaçu National Park(25.63– 25.69°S, 54.43– 54.44°W),  200–230 ma.s.l.,  31.x.2014( B.A. Huber, L.S. Carvalho);  1♂ 2♀ 1 juv.in pure ethanol, ZFMK( Br14- 205), same data.  17♂ 15♀3 juvs, ZFMK( Ar19182–83), Foz do Iguaçu National Park, near Céu Azul( 25.130°S, 53.823°Wto 25.149°S, 53.807°W),  620–690 ma.s.l.,  2.xi.2014( B.A. Huber, L.S. Carvalho);  2♀in pure ethanol, ZFMK( Br14-208), same data.   FIGURES 408–418.  Mesabolivar iguazuHuber, 2000(408–410, ZFMK Ar 19181) and  M. argentinensis(Mello-Leitão, 1938)(411–418, MACN Ar 32453). 408–414. Left procursi, prolateral, dorsal, and retrolateral views (412: prolateral, slightly dorsal view). 415–416. Male chelicerae, frontal and lateral views. 417–418. Epigynum, ventral and lateral views. Scale lines: 0.2 (408–414; all procursi at same scale), 0.3 (415–416), 0.5 (417–418).  Description(amendments; see Huber 2000). Tibia 1 in65 newly examined males: 7.6–12.1 (mean 10.5). Femora 2 and 3 insome 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. 737). 1835975636 1990-12-08 AMNH Argentina 206 -25.66 Misiones 747 -54.47 95 96 2 1 Misiones holotype 1835975544 1963-09-04 MACN Argentina -25.678333 Ar 124 -54.448334 New 95 96 23 18 5 Misiones 1835975640 1954-11 MACN Schiapelli & De Carlo Argentina -25.678333 Ar 124 -54.448334 New 95 96 13 6 7 Misiones 1835975647 [416,1104,1445,1470] 1959-08-16 MACN Nunez Argentina -25.678333 Ar 124 -54.448334 New 95 96 1 1 Misiones 1835975553 1966-01-13 MACN Galiano Argentina -25.678333 Ar 124 -54.448334 New 95 96 2 1 1 Misiones 1835975559 [559,1237,1481,1506] 2012-03-01 ZIMG G. Rubio Argentina -25.678333 Ar 124 -54.448334 New 95 96 1 1 Misiones 1835975560 1993-07-15 MACN M. di Vitteti Argentina Ar 95 96 1 1 Misiones 1835975552 1995-02-08 1995-02-15 1995-02-08 MACN M. J. Ramirez Argentina Ar 95 96 1 1 Misiones 1835975547 2005-01-18 2005-01-21 2005-01-18 MACN C. Grismado Argentina Ar 95 96 3 2 1 Misiones 1835975653 [392,1170,1589,1614] 2012-02-24 2005-01-21 2005-01-18 ZIMG P. Michalik Argentina Ar 95 96 2 1 1 Misiones 1835975649 1950-10 MACN Schiapelli & De Carlo Argentina Parque Nacional Iguazu Ar 95 96 1 1 Misiones 1835975558 1995-02-08 1995-02-15 1995-02-08 MACN M. J. Ramirez Argentina Ar Ar 95 96 6 2 4 Misiones 1835975646 [462,1197,1661,1686] 1983-07 1995-02-15 1995-02-08 MACN P. A. Goloboff Argentina Ar Ar 95 96 1 1 Misiones 1835975637 1985-07 1995-02-15 1995-02-08 MACN M. Ramirez Argentina Ar Ar 95 96 4 2 2 Misiones 1835975632 1995-02-08 1995-02-15 1995-02-08 MACN M. J. Ramirez Argentina -25.666666 Yacui 1245 -54.2 Ar 95 96 1 1 Misiones 1835975639 1966-01 MACN Galiano Argentina 230 -25.68 Arroyo Yacui 124 -54.168335 Ar 95 96 1 1 Misiones 1835975630 2012-02-29 ZIMG Argentina Apepu Parque Nacional Iguazu 95 96 1 1 Misiones 1835975564 1995-10-27 1995-10-29 1995-10-27 MACN M. Ramirez Saint Pierre and Miquelon 500 -26.5 Parque Provincial Cruce Caballero Ar 95 96 1 1 1835975573 1995-02-14 1995-02-15 1995-02-14 MACN M. Ramirez Uruguay Ar 200 -25.866667 Deseado 1244 -54.566666 Refugio Caa-Pora 95 96 1 1 1835975585 1954-09 MACN Schiapelli & De Carlo Uruguay 530 -26.05 Refugio Pinalitos 1243 -53.733334 Ar 95 96 1 1 1835975678 1952-02 MACN M. Partridge Uruguay 580 -26.466667 Ar 1241 -53.883335 95 96 1 1 1835975673 2014-10-31 ZFMK B. A. Huber & L. S. Carvalho Brazil 215 -25.69 Foz do Iguacu National Park 747 -54.44 Ar 96 97 44 15 29 Parana 1835975662 2014-10-31 ZFMK Br Brazil 215 -25.69 Foz do Iguacu National Park 747 -54.44 Ar 96 97 4 2 1 Parana 1835975567 2014-11-02 ZFMK B. A. Huber & L. S. Carvalho Brazil Ar 655 -25.149 Ceu Azul 74 -53.807 Foz do Iguacu National Park 96 97 32 15 17 Parana 1835975568 2014-11-02 ZFMK Br Brazil Ar 655 -25.149 Ceu Azul 74 -53.807 Foz do Iguacu National Park 96 97 2 2 Parana