Mesabolivar guapiara Huber, 2000

Paredes-Munguia, Williams & Teixeira, Renato Augusto, 2019, Description of the female of the cellar spider Mesabolivar guapiara (Araneae, Pholcidae) from Mata Atlântica, Brazil, Zootaxa 4657 (1), pp. 191-195 : 191-194

Mesabolivar guapiara Huber, 2000 ( Figs 1–19 )

Mesabolivar guapiara Huber, 2000: 189 (figs 864–868; male holotype from Fazenda Intervales, 15km E Guapiara, São Paulo, Brazil, Feb.1990, W.G. Eberhard leg., deposited in MCZ, not examined).

Material examined: BRAZIL, São Paulo: 1♀ 1♂, Ribeirão Grande (Gruta da Mãozinha, Parque Estadual Intervales—Bo- caina/ Lajeado , 24°16’23”S, 48°26’56”W), 26-30.III.2009, F. Pellegatti Franco et al. leg. ( IBSP 198438 ) ; 1♂, Iporanga (PE- TAR—Caboclos, Gruta Aranhas , 24°26’04”S, 48°35’20”W), 26-30.III.2009, F. Pellegatti Franco et al. leg. ( IBSP 198433 ) . Paraná: 1♀, Jaguariaíva ( Parque Estadual do Cerrado , 24°10’37”S, 49°39’40”W), 22.X.1995, L. Mestre leg. ( IBSP 11795 ) ; 1♂, Sengés (Gruta do Pinhalzinho, Ouro Verde , 24°24’14”S, 49°16’42”W), 23.IV.2015, B.G.S. Nogueira leg. ( MHNCI) ; 1♂, ( MHNCI) ; 1♀, 23.IV.2016, K. Mise leg. ( MHNCI) ; 1♀, 23.IV.2016 T. Kardush leg. ( MHNCI) ; 1♀ 1♂, 28.VII.2016 W. Paredes-Munguia leg. (MCTP-43005); 1♀ 1♂, 23.IV.2016, W. Paredes-Munguia leg. ( MHNCI) ; 1♀, 09.IX.2017, K. Mise leg. ( MHNCI) ; 1♂, ( MHNCI) ; 1♂, 09.IX.2017, D.C.S. Plazas leg. ( MHNCI) ; 1♀, ( MHNCI) ; 1♀, Dr. Ulysses ( Gruta da Volta , 24°27’13”S, 49°19’01”W), 13-14.X.2000, R. Pinto da Rocha leg. ( MZSP 14894 ) ; 1♂, 27.II.2017, T. Kardush leg. ( MHNCI) ; 1♀ 1♂, ( MHNCI) ; 1♂, ( MHNCI) ; 1♀, 08.IX.2017, G.S. Ghedin leg. ( MHNCI) ; 1♀, 08.IX.2017, K. Mise leg. ( MHNCI) ; 1♂, 08.IX.2017, W. Paredes-Munguia leg. ( MHNCI) ; 1♂, Castro ( Pinheiro Seco , 24°44’22”S, 49°32’54”W), 29.X.2016, K. Mise leg. ( MHNCI) ; 1♀ 2♂, Tunas do Paraná (Gruta dos Jesuítas , Parque Estadual Campinhos , 25°02’21”S, 49°05’30”W), 21.III.2017, T. Kardush leg. (MCTP-43004) ; 1♀ 1♂, 28.VII.2017, W. Paredes-Munguia leg. (MCTP-43003); 1♀, Colombo ( Gruta de Bacaetava , 25°13’54”S, 49°12’26”W), 21.VI.1999, R. Pinto da Rocha leg. ( MZSP 18961 ) . Rio Grande do Sul: 1♂, São Francisco de Paula (Potreiro Velho, Pró-Mata , 29°28’50”S, 50°10’28”W), 30.IV.2001, R. Bal- disera leg. (MCTP-15928) ; 1♂, 01.X.2001, L. A. Bertoncello leg. (MCTP-24873); 1♂, 01.V.2002, L.A. Bertoncello leg. (MCTP-24867); 1♂ (MCTP-24886); 1♂, 24-26.IV.2006, A. A. Lise leg. (MCTP-35724).

Diagnosis. Males of M. guapiara can be distinguished from those of M. brasiliensis (Moenkhaus, 1898) by the procursus strongly curved basaly ( Figs 12, 14 ) and highly sclerotized distaly ( Figs 14–16, 18 ), whereas M. brasiliensis present a distally widened and sclerotized procursus ( Huber 2000: figs 844–845). Females of M. guapiara can be distinguished by the epigynum and pocket conspicuous ( Figs 1–5 ), and by the pore plates longer than wide ( Figs 6–8 ), whereas M. brasiliensis (Moenkhaus, 1898) present inconspicuous epigynum and pocket ( Huber 2000: fig. 850), and a round pore plate ( Huber 2000: fig. 840).

Description. Male described by Huber (2000: 222).

Female ( MCTP 43003). Total length (N=18) 4.3, carapace width (N=18) 19.1; leg I: 55.29 (13.8+0.7+13.7+24.3+2.9), tibia II: 9.4, tibia III: 7.2, tibia IV: 9.5; tibia I l/d: 113.9. Prosoma shape as iguazu species group (Huber 2018: figs 378– 389); distance PME-ALE about 6% of PME diameter. Carapace yellow, with brown median mark, ocular area brown, clypeus yellow, sternum orange. Chelicerae light brown with a pair of black distal apophysis. Palps ochre yellow to light brown, femur narrow ( Figs 9–10 ). Legs ochre, femora and tibiae with light tips; legs without spines, without curved and vertical hairs, trichobothrium on the tibia and basal portion of the metatarsi, in both located on the dorsal view, tarsus I with more than 30 pseudosegments. Ophistosoma greenish gray, with dorsal and lateral surface covered with dark patchy marks, and with a ventral light brown area ( Fig. 9, 11 ). Epigynum with an anterior plate dome-shaped without any bulge ( Fig. 1 ); posterior plate smooth with width similar to the anterior plate ( Figs 2–3 ). Borders of the anterior and posterior plates straight and quite membranous ( Figs 2–3 ). Internal genitalia with a pair of large porous plate (Po) converging anteriorly ( Figs 6–8 ).

Variation. Males (n=10) have tibia I with 14.3 on average, ranging from 11.3 to 16.9; females (n=12) with 12.7 on average, ranging from 9.6 to 14.1.

Comments. Only specimens from São Paulo and Paraná were reported from caves ( Fig. 19 ). Although Mesabolivar Gonzales-Sponga, 1998 belongs to a monophyletic subfamily ( Modisiminae ) characterized by a high degree of species adapted to various environments including cavern-rich geographical areas ( Huber 2018b), no evidence of morphological adaptation to caves occur in this species. Specimens from Rio Grande do Sul and Paraná were relatively smaller and pallid than those from São Paulo.

Distribution. Brazil (São Paulo, Paraná and Rio Grande do Sul)

Figures

FIGURES 1–11. Mesabolivar guapiara (Huber 2000), female. 1–5. Epigynum (3, 4 SEM). 1–4. Ventral (2, cleared; 4, epigynal pocket detail).5. Lateral. 6–8. Vulva dorsal (6, 7 SEM) (7, pore plate detail; 8, cleared). 9–11. Habitus (9, lateral; 10, frontal; 11, ventral). Scale bars: 1–3, 5, 6, 8, 10, 500 μm; 4, 100μm; 7, 200μm; 9, 11, 1mm. Ap, Anterior plate, Pp, Posterior plate, Ep, Epigynal pocket, Po, Pore plate, white arrow, ventral cheliceral apophyses.

FIGURES 12–19. Mesabolivar guapiara (Huber 2000), male, and records of the species. 12–13. Habitus (12, lateral; 13, frontal). 14–18. Left palp (16–18 SEM) (14, 16–18, prolateral, white arrow sclerotized procursus; 15, retrolateral; 17 bulbal process membranous tip; 18, procursus tip). 19. Record on Southeast and Southern Brazil.