Meriola foraminosa Keyserling

González, María E., Grismado, Cristian J. & Ramírez, Martín J., 2021, A Taxonomic Revision Of The Spider Genus Meriola Banks (Araneae: Trachelidae), Zootaxa 4936 (1), pp. 1-113 : 43-45

Meriola foraminosa Keyserling

Figs 31–33 , 89

Trachelas foraminosus Keyserling, 1891: 60 , fig. 32 (female holotype from Rio Grande , Rio Grande do Sul, Brazil, in BMNH, examined by Platnick & Ewing, 1995).

Meriola foraminosa Platnick & Ewing, 1995: 29 , fig. 72–76.

Diagnosis. Both sexes present depressed setal bases associated with tubercles covering the carapace surface. Males ( Figs 32–33 ) can by distinguished by the short, twisted embolus, RTA nearly triangular with acute tip, and the presence of a distal spine on the prolateral side of femora II and III. Females ( Fig. 31 ) can be also distinguished by the narrow anterior epigynal hood and the well separated copulatory openings and the very wide median field.

Description. See Platnick & Ewing (1995) for male and female descriptions.

Natural history and habitat. Several specimens were collected in pitfall traps in forests and shrub steppes, between rocks.

Distribution. Known from a few localities in Venezuela, Ecuador, Perú, Brazil, Chile, and from La Rioja, Buenos Aires, Neuquén and Río Negro provinces in Argentina ( Fig. 89 ).

New records. ECUADOR: Pichincha: Quito , in building, S 0.180653°, W 78.467838°, IV.1994, V. & B. Roth, 1 male ( CAS, CASENT 9059208 ) . PERÚ: Puno: Chucuito: Cerro Ancomarca , S 16.648331°, W 69.364453°, elev. 4081 m, 4.III.2010, E. Razuri, 1 female ( MUSM-ENT 0501377 ) . BRAZIL: Rio Grande do Sul: Pelotas , S 31.765399°, W 52.337589°, 1–3.V.1997, L. Moura, 1 male ( MCN 28371) . Capão do Leão , S 31.836963°, W 52.574653°, 15.I.2008, J. Rosado, 2 males ( MCN 46783) . ARGENTINA: La Rioja: Chilecito: Guanchin , S 29.182324°, W 67.644785°, 24.X.1980, M. Galiano, 1 male ( MACN-Ar 16327 ) . Buenos Aires: Campana: Reserva Natural Otamendi , S 34.230186°, W 58.869773°, 30.VI.2007, C. Grismado, L. Damer, I. Crudele, S. Olejnik, S. Trivero, N. López & S. De Biase, 1 male, sample CJG-03001, temporary preparation CJG-01242 ( MACN-Ar 12818 ) . La Matanza: Lomas del Mirador , S 34.666369°, W 58.533396°, IV.1995, C. Grismado, 1 female (MACN-Ar 16365) . Tornquist: Sierra de la Ventana , S 38.137325°, W 61.794005°, I.1991, between rocks, A. Belner & N. Florio, 1 female ( MACN-Ar 30566 ) . Sierra de la Ventana, Cerro Negro, S 38.139334°, W 61.794130°, 12.IV.1974, C. Cesari, 1 male ( MACN-Ar 16351 ) . Neuquén: Truran Kura nr. San Martín de los Andes , S 40.157988°, W 71.317981°, elev. 1000 m, 27–30.IX.1986, M. Gentill, 1 female ( NMHN 01561 ) . Río Negro: Bariloche: Parque Nacional Nahuel Huapi, Cerro López , S 41.08152°, W 71.54571°, elev. 800 m, III.2006, pitfall traps, V. Werenkraut, 1 male, temporary preparations MGM-00193, MGM-00484, MGM-00485 ( MACN-Ar 19130 ) . Bariloche: Cerro Challhuaco , S 41.18041°, W 71.32352°, elev. 908 m, I.2006, pitfall traps, V. Werenkraut, 1 male ( MACN-Ar 21751 ) . Bariloche: El Bolsón, Loma del Medio , S 41.977258°, W 71.554162°, II.2002, pitfall traps, P. Sackmann, 1 male ( MACN-Ar 33076 ) . Same locality, I.2002, pitfall traps, P. Sackmann, 1 male ( MACN-Ar 33078 ) . CHILE: Región RM Metropolitana de Santiago: Provincia de Cordillera: Reserva Nacional Río Clarillo , S 33.7635436°, W 70.4218734°, collector unknown, 4 females, 6 males ( MACN-Ar 30969 ) .

Figures

FIGURE 31. Meriola foraminosa Keyserling, female (MACN-Ar 30566). a, habitus, dorsal view; b, same, ventral view; c, same, lateral view; d, prosoma, dorsal view; e, same, ventral view; f, same, lateral view; g, habitus, anterior view; h, epigyne, ventral view.

FIGURE 32. Meriola foraminosa Keyserling, male (MACN-Ar 19130). a, habitus, dorsal view; b, same, ventral view; c, same, lateral view; d, prosoma, dorsal view; e, same, ventral view; f, same, lateral view.

FIGURE 33. Meriola foraminosa Keyserling, male (MACN-Ar 19130). a, habitus, anterior view; b, left palp, ventral view; c, same, prolateral view; d, same, retrolateral view.

FIGURE 89. Known distribution of Meriola arcifera and M. foraminosa in America. Records of M. arcifera in U.S.A., Easter Island and Robinson Crusoe Island, marked with a dotted line are probably recent introductions.