Meriola ramirezi Platnick & Ewing

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 : 89

publication ID

https://doi.org/10.11646/zootaxa.4936.1.1

publication LSID

lsid:zoobank.org:pub:DAC2F49B-EE13-4827-B549-C59B9C43550B

DOI

https://doi.org/10.5281/zenodo.4673037

persistent identifier

https://treatment.plazi.org/id/03AB87CF-FF96-E319-FF73-5418FBBDF916

treatment provided by

Plazi

scientific name

Meriola ramirezi Platnick & Ewing
status

 

Meriola ramirezi Platnick & Ewing

Figs 73–75 View FIGURE 73 View FIGURE 74 View FIGURE 75 , 94b View FIGURE 94

Meriola ramirezi Platnick & Ewing, 1995: 38 , figs 102–106 (male holotype from San Pedro, Buenos Aires, Argentina, in MACN, examined; female misidentified, see M. davidi ).

Diagnosis. Males ( Figs 74 View FIGURE 74 , 75 View FIGURE 75 c–e) resemble those of M. teresita by the uniform orange-brown and nearly smooth carapace, and the uniform gray abdomen, but can be recognized by the retrodistal protrusion of the tegulum. Females ( Fig. 73 View FIGURE 73 , 75 View FIGURE 75 a–b, 75f) resemble those of M. davidi by their orange-brown carapace and the general morphology of the genitalia (nearly parallel sclerotized ridges and large, piriform S2), but differ by having shorter copulatory ducts, relatively larger and rounded median spermathecae with stalks, and by lacking granulation on the carapace.

Description. Female (MACN-Ar 12786): Carapace length 1.73, width 1.30, narrowed in eye region. Carapace without prominent tubercles at base of setae. Palpal tarsus length 0.48. Sternum length 1.00, width 0.77. Length of tibia/metatarsus: I, 1.33/missing; II, 0.93/0.82; III, 0.65/0.72; IV, 1.27/1.25. Spines: Leg I, femur p 1ap. II, femur p 1ap, d 1bas. III, femur d 1bas. IV, femur d 1bas; tibia v 1bas. Leg cuspules absent. Opisthosoma length 2.27. Color in ethanol: Prosoma orange-brown. Chelicerae yellowish-brown. Legs yellowish (III and IV slightly paler), without dark markings. Sternum pale orange. Opisthosoma whitish, with light gray spots, making tenuous chevron on posterior part. Venter without spots, almost uniformly whitish. Sometimes coloration considerably darker in living specimens (with abdomen uniformly dark gray, Figs 73h View FIGURE 73 , 75f View FIGURE 75 ). Epigyne ( Figs 75 View FIGURE 75 a–b): single plate flanked by two sclerotized marginal guides, with copulatory openings in anterior position; copulatory ducts short, S2 large and elongated, widened anteriorly, receptacle of copulatory ducts small and oval, anterior to S1, rounded and larger in size.

Male described by Platnick & Ewing (1995).

Natural history and habitat. The specimens from Parque Nacional Predelta were collected in a forest of Tessaria integrifolia (“aliso”), Mikania cordifolia , Cayaponia citrullifolia , Ephedra tweediana (“enredaderas”) and Coleataenia prionitis (“paja brava”), and in a marsh in a lagoon. The specimens from Reserva Otamendi were collected by beating grasses in halophilous grassland. The spiders adopt a cryptic posture with all the legs stretched, as occurs with other grass-dwelling spiders from the same area (e.g., Anyphaenidae ; see Ceccarelli et al. 2019). The specimen on which the description is based constructed a lenticular egg sac containing six eggs in the lab (diameter 8 mm, Fig. 75g View FIGURE 75 ).

Distribution. Known from Entre Ríos and Buenos Aires provinces in Argentina ( Fig. 94b View FIGURE 94 ).

New records. ARGENTINA: Entre Ríos: Diamante: Parque Nacional Predelta, Campo Sarmiento, pastizal, S 32.12057°, W 60.62524°, elev. 35 m, 23–26.V.2011, foliage, G. Rubio, L. Piacentini & M. Izquierdo, 1 female (MACN-Ar 30989). Parque Nacional Predelta, isla frente a seccional, 6 km S de Diamante (MJR-loc-143), S 32.1214°, W 60.63528°, elev. 10 m, 1.V.2013, forest of Tessaria integrifolia (“aliso”), Mikania cordifolia , Cayaponia citrullifolia , Ephedra tweediana (“enredaderas”) and Coleataenia prionitis (“paja brava”), hand collection, M. Ramírez, L. Piacentini, M. González Márquez, A. Laborda & S. Aisen, 1 female, sample MGM-00142 (MACN-Ar 30280), 1 male, sample MGM-00149 (MACN-Ar 30287). Parque Nacional Predelta, bañado cerca de entrada, 6 km S de Diamante (MJR-loc-142), S 32.12194°, W 60.62996°, elev. 10 m, 30.IV.2013, marsh in lagoon, hand collection, M. Ramírez, L. Piacentini, M. González Márquez, A. Laborda & S. Aisen, 1 female, sample MGM- 00132 (MACN-Ar 30270), 1 male, sample MGM-00134 (MACN-Ar 30272). Buenos Aires: Zárate: Las Palmas, S 34.069377°, W 59.150693°, VI.1982, M. Ramírez, 1 female (MACN-Ar 16336). Isla Talavera, 2 km E Zárate, S 34.100843°, W 58.9886198°, 3.XI.1996, M. Ramírez, 4 females (MACN-Ar 16342), 1 male (MACN-Ar 30988). Campana: Estación Río Luján, S 34.278°, W 58.890168°, elev. 4 m, 28.VII.2007, beating shrubs, C. Grismado, L. Damer, I. Crudele, N. Olejnik, N. López & S. De Biase, 1 female, temporary preparations CGJ-00670, CJG-00833 (MACN-Ar 12786), 1 female, temporary preparations CJG-00559 (MACN-Ar 12785), 1 female, sample EMS- 04094, temporary preparations CJG-00648, MGM-00163 (MACN-Ar 12783). Reserva Natural Otamendi, Estación Río Luján, S 34.278017°, W 58.890346°, elev. 5 m, 9.IX.2011, hand collection, M. Ramírez & Equipo MACN-Ar, 1 female, sample LNP-04228, temporary preparation LNP-00967 (MACN-Ar 28812).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Trachelidae

Genus

Meriola

Loc

Meriola ramirezi Platnick & Ewing

González, María E., Grismado, Cristian J. & Ramírez, Martín J. 2021
2021
Loc

Meriola ramirezi

Platnick, N. I. & Ewing, C. 1995: 38
1995