Plato bicolor ( Keyserling, 1886 )

Prete, Pedro H. & Brescovit, Antonio D., 2024, Taxonomic revision of the orb weaving spider genus Plato Coddington, 1986 (Araneae: Theridiosomatidae) with the description of three new species, Zootaxa 5471 (1), pp. 1-32 : 7-10

publication ID

https://doi.org/ 10.11646/zootaxa.5471.1.1

publication LSID

lsid:zoobank.org:pub:AB362023-F807-49EB-AB62-8B862DA9917D

DOI

https://doi.org/10.5281/zenodo.12190445

persistent identifier

https://treatment.plazi.org/id/715D87BA-4D18-2870-FF17-FBA4FE7BF8DE

treatment provided by

Plazi

scientific name

Plato bicolor ( Keyserling, 1886 )
status

 

Plato bicolor ( Keyserling, 1886) View in CoL

Figures 1 View FIGURE 1 , 5 View FIGURE 5 , 6 View FIGURE 6 , 23 View FIGURE 23

Wendilgarda bicolor Keyserling, 1886:131 , fig. 209 (female holotype from State of Amazonas (no specific location), Brazil, deposited in BMNH, not examined).

Plato bicolor View in CoL : Coddington, 1986: 33; Lopez, 1996: 192, fig. 9.

Material examined. BRAZIL. Amazonas : Presidente Figueiredo, Cave Maroaga (1°56'6"S, 59°25'19"W), 10♂, 15♀, 25.xi.2013, B. T. Faleiro et al. col. ( UFMG 18217 , SEM); GoogleMaps 5♀, 06.v.2006, V. R. Alves col. ( INPA 418 ); Gruta da Judéia (2°3'6"S, 59°58'12"W), GoogleMaps 1♂, 10♀, 25.xi.2013, B. T. Faleiro et al. col. ( UFMG 18210 ) GoogleMaps .

Diagnosis. Males of Plato bicolor present a digitiform conductor apophysis (fig. 5B), similar to P. ferriferus (fig. 9C), but are distinguished by the elongated apophysis base and by having a distal sulcus (fig. 5D). Females of P. bicolor are recognized by the ventrally projected rectangular dorsal plate (fig. 6C, F) and projected and strongly sclerotized transversal groove in the epigynal plate (fig. 6B, D), occupying half of the ventral area of the plate (fig. 6B).

Description. Male (UFMG 18210). Carapace, sternum, and legs light brown. Chelicerae, labium and endites brown. Abdomen grayish, length: 1.2. Total length: 2. Carapace length: 0.9. Clypeus height: 0.3. Sternum: 0.5 in length and width. Eyes: AME 0.12; AME-AME 0.03; ALE-PLE contiguous (0.05 each); PME-PME separated by 0.06 (PME 0.07). Legs: I femur 1.35/ patella 0.42/ tibia 1.15/ metatarsus 0.76/ tarsus 0.58/ total 4.26; II 1.2/ 0.5/ 1.15/ 0.8/ 0.58/ 4.23; III 0.84/ 0.32/ 0.6/ 0.48/ 0.44/ 2.68; IV 1/ 0.32/ 0.64/ 0.52/ 0.4/ 2.88. Palp. Median apophysis with a very curved and sclerotized tip (fig. 5F). Embolus with a bifid distal apophysis (fig. 5C, F), flattened and hyaline at the tip, covered by the large conductor (fig. 5B, D). Abdomen oval.

Female (UFMG 18210). Coloration as in male. Abdomen oval, length: 1.77. Total length: 2.6. Carapace length: 1.15. Clypeus height: 0.18. Sternum: 0.58 in length and width. Eyes: AME 0.09; AME-AME 0.04; ALE-PLE contiguous (0.07 each); PME-PME separated by the diameter of 1 PME (PME 0.08). Legs: I femur 1.32/ patella 0.48/ tibia 0.94/ metatarsus 0.8/ tarsus 0.54/ total 4.08; II 1.2/ 0.46/ 0.84/ 0.56/ 0.48/ 3.54; III 0.88/ 0.36/ 0.6/ 0.45/ 0.46/ 2.75; IV 1.05/ 0.36/ 0.8/ 0.58/ 0.5/ 3.29. Epigynum. Dorsal plate posterior to spermathecae (fig. 6D). Epigynal plate,with tapered and projected lateral margins (fig. 6B). Well-marked central pore, transversal groove, and support (fig. 6B).

Variation. 10 males: total length: 1.6–2; carapace: 0.7–1; femur I: 1.12–1.35. 10 females: total length: 2.34– 2.6; carapace: 0.97–1.15; femur I: 1.31–1.5.

Distribution. Known only for Caverna Maroaga and Gruta da Judéia, both in Presidente Figueiredo, state of Amazonas, Brazil (fig. 23).

T

Tavera, Department of Geology and Geophysics

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Theridiosomatidae

Genus

Plato

Loc

Plato bicolor ( Keyserling, 1886 )

Prete, Pedro H. & Brescovit, Antonio D. 2024
2024
Loc

Plato bicolor

Lopez, A. 1996: 192
Coddington, J. A. 1986: 33
1986
Loc

Wendilgarda bicolor

Keyserling, E. 1886: 131
1886
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