Epicadus planus Mello-Leitão, 1932

Silva-Moreira, Thiago Da & Machado, Miguel, 2016, Taxonomic revision of the crab spider genus Epicadus Simon, 1895 (Arachnida: Araneae: Thomisidae) with notes on related genera of Stephanopinae Simon, 1895, Zootaxa 4147 (3), pp. 281-310: 297-300

publication ID

http://doi.org/10.11646/zootaxa.4147.3.4

publication LSID

lsid:zoobank.org:pub:BD34D436-7AB1-49F5-AD35-76D91AF3AEEB

persistent identifier

http://treatment.plazi.org/id/039B87E6-FFD4-9745-7EF3-FD3AD321FF45

treatment provided by

Plazi

scientific name

Epicadus planus Mello-Leitão, 1932
status

 

Epicadus planus Mello-Leitão, 1932 

Figs 1View FIGURE 1 G–I, 11–14, 15D–F, 20

Epicadus planus Mello-Leitão, 1932: 73  . Roewer 1954: 755; Brignoli 1983: 604; World Spider Catalog 2016. Epicadus nigronotatus Mello-Leitão, 1940: 213  . N ew synonymy.

Etymology. “ Planus  ” is derived from the Latin word planus  “flat”, and is an adjective.

Type material: Holotype of Epicadus planus  (designated by Mello-Leitão 1932): female, BRAZIL, Bahia, Ilhéus  , [-14.81642, -39.033268], E.E. May leg. ( MNRJAbout MNRJ 14205View Materials; examined). 

Holotype of Epicadus nigronotatus  (designated by Mello-Leitão 1940): female, BRAZIL, Espírito Santo, Goitacazes , FLONA Goitacazes, Linhares, [-19.396667, -40.061667], M. Rosa leg. ( MNRJAbout MNRJ 58252View Materials; examined). 

Note. The original descriptions of both E. planus  and E. nigronotatus  were poor and lack any illustrations, and are based on intraspecifically variable characters (such as size and slight changes in the angle of opisthosomal projections) or on features also seen in other thomisid species. Upon study of the type specimens, E. planus  and E. nigronotatus  were found to be different only in size and intraspecific variations of the external morphology, which leads us to synonymize both species.

Other material examined. MEXICO: San Luis Potosí:  3 males, Xilitla, Las Pozas, [19.1372, -97.2050], Aracno lab leg., 18 November 2011 (UNAM-JAM 171). PANAMA: Bocas del Toro:  2 females, Barro Colorado Island, Canal Zone, [9.1636, -79.8377], A.M. Chickering leg., 3 May 1954 ( MCZAbout MCZ). TRINIDAD AND TOBAGO: Arima:  1 male and 1 female, Simla, [10.6333, -61.2833], A.M. Chickering leg., April 1964, ( MCZAbout MCZ). Port of Spain: 2 females  , Port of Spain, [10.6503, -61.5166], R. Thaxter leg., 1913 ( MCZAbout MCZ)  . Saint Patrick: 2 females, Balandra Bay , [Sangre Grande, 10.7135, -60.9962], Reynolds leg., April 1922 ( MCZAbout MCZ). BRAZIL  : Roraima: 1 male, Alto Alegre, Ilha de Maracá, [2.0438, -50.4504], A.A. Lise leg., 7 December 1987 ( MCTPAbout MCTP 19557View Materials)  ; 1 male, A.A. Lise leg., 10 December 1987 (MCTP 19558); 1 male and 1 female, A.A. Lise leg., 10 December 1987 (MCTP 19559); 1 male, A.A. Lise leg., 10 December 1987 (MCTP 19560); 1 male, A.A. Lise leg., 18 December 1987 (MCTP 19561); 1 female, A.A. Lise leg., 20 December 1987 (MCTP 19562); 1 male, A.A. Lise leg., 8 December 1987 (MCTP 19563); 1 female, A.A. Lise leg., 10 December 1987 (MCTP 19564); 2 males, A.A. Lise leg., 10 December 1987 (MCTP 19565). Amazonas: 1 male, Alto Solimões, [-4.2326, -69.9262], A.A. Lise leg., December 1979 ( MCNAbout MCN 8831View Materials)  ; 1 female, Tefé, [-3.3538, -64.7108], H.O. Parrish leg., 1919 (MCZ); 1 female, Manaus, Reserva Ducke, [-2.9619, -59.9277] Y. Camara and J.E. Binda leg, 10–15 June 1988 (INPA 4560); 1 female, Coari, Base de Operaçoes Geólogo Pedro de Moura, [-4.0943, -63.1445], A.B. Bonaldo leg., 26 September 2004 (MPEG 22672). Bahia  : 1 female, Itamarajú, Fazenda Nossa Senhora das Neves, [-17.0348, -39.5363], J.S. Santos leg., 9 October 1978 ( MCNAbout MCN 10176View Materials)  ; 1 female, Fazenda Jacarandá, [-17.0348, -39.5363], J.S. Santos leg., 9 December 1977 (MCN 10139); 1 female, Camacan, Fazenda Esperança, [-15.4155, -39.4956], CEPLAC leg, 22 August 1969 (MNRJ 10395). Espírito Santo: 1 male, Linhares, Reserva Florestal Vale, [-19.1402, -40.0557], A.D. Brescovit leg., July 1998 ( IBSPAbout IBSP 24318View Materials)  ; 1 male, G. Machado & A.J. Santos leg., July 1998 (IBSP 26991). Mato Grosso: 1 female, Chapada dos Guimarães, [-15.3599, -55.8921], M. Hofmann leg, 9 December 1983 ( MCNAbout MCN 11961View Materials)  ; 1 female, Barra dos Bugres, R. Saschsse leg., November 1986 (MNRJ 4251); 1 male, Querência, Canarana, Fazenda Tanguro, [- 13.0700, -52.3817], D.F. Candiani leg., 28 October 2006 (MPEG 22622). Mato Grosso do Sul: 1 male, Brasilândia, Usina Hidrelétrica Sérgio Motta, -[22.2766, -52.9669], IBSPAbout IBSP 2000View Materials staff leg. ( IBSPAbout IBSP 35309View Materials)  . Rio de Janeiro: 1 male, Niterói, Itacoatiara, [-22.9720, -43.0320], R.L.C. Baptista & A.P. Chaves leg., 20 July 1980 ( MNRJAbout MNRJ 4247View Materials)  ; 1 female, Rio de Janeiro, Parque Nacional da Tijuca, [-22.95, -43.2833], R.F. Rodrigues leg., 22 October 1985 ( MNRJAbout MNRJ 10384View Materials)  ; 2 males, Rio de Janeiro, Jardim Botânico, [-22.9677, -43.2248], R.L.C. Baptista leg., 8 June 1986 ( MNRJAbout MNRJ 10368View Materials)  ; 3 males, Rio de Janeiro, Morro do Pão de Açúcar , [-22.9493, -43.1545], E.H. Wienskoski leg., November 2004, ( MNRJAbout MNRJ 11479View Materials)  ; 2 males and 11 females, Silva Jardim, Poço das Antas, [- 22.5041, -42.2704], A. Sanseverino leg., 15 May 1994 (MNRJ 11429). Paraná: 1 male, Fênix, [-23.9150, - 51.9818], 1 September 1986 ( MCNAbout MCN 16985View Materials)  . Rio Grande do Sul: 1 female, São Borja, Reserva Biológica São Donato, [-29.0464, -56.0837], M.Machado leg., 31 January 2012 ( MCTPAbout MCTP 34653View Materials)  . BOLIVIA: Beni: 1 male, El Trapiche, Estación Biológica del Beni, [-14.6376, -66.2788], A.D. Brescovit leg., August 1993 ( MCNAbout MCN 24169View Materials)  .

Diagnosis. Females of E. planus  differ from the other two species by the discrete eye mount, without the vertical spiniform projections ( Fig. 11View FIGURE 11 D), truncated median posterior abdominal projection that ends in three smaller tips (1G, H, I, 11C, E), vestigial MS and by a line of black granules on the dorsum of the prosoma ( Figs 11View FIGURE 11 B, C) and five black spots on the opisthosoma, three dorsal and two posterior, between the upper and lower lateral projections. Males have a very discrete eye mount ( Fig. 13View FIGURE 13 D), opisthosomal sclerites larger than in E. rubripes  and E.heterogaster  ( Fig. 13View FIGURE 13 E) and a distinct transversal line of black sclerites on the opisthosoma dorsum ( Fig. 13View FIGURE 13 A). Male palp in ventral view resemble those of E. heterogaster  , with the tegular furrow at eight o’clock, but differ in both margins of RTA remarkably folded and in the DTA tip directed ventrally and forming a straight angle with the axis of the RTA ( Figs. 14View FIGURE 14 C, D; 15I).

Description. Female ( E. nigronotatus  holotype, MNRJAbout MNRJ 58252): Total length 10.07 mm; prosoma width 4.47; opisthosoma width 5.47; prosoma height without projections 2.47; opisthosoma height without projections 4.47. Legs measurements: femur I 4.53; patella I 2.63; tibia I 2.80; metatarsus I 2.13; tarsus I 1.47; femur II 4.70; patella II 2.03; tibia II 2.97; metatarsus II 2.07; tarsus II 1.60; femur III 2.60; patella III 0.77; tibia III 1.97; metatarsus III 1.27; tarsus III 0.67; femur IV 2.80; patella IV 1.33; tibia IV 1.87; metatarsus IV 1.93; tarsus IV 0.73. Leg spination: tibia I 2 -0-2-2; metatarsus I 2 -0-2-2ap; tibia II 2 -0-2-2; metatarsus II 2 -0-2-2ap (dorsal) 2-2 (retrolateral). Epigynum and genital features as in Fig. 12View FIGURE 12.

Male ( MNRJAbout MNRJ 11479): Total length 2.75mm; prosoma width 1.35mm; opisthosoma width 1.56; prosoma height 0.78; opisthosoma height without projections1.19. Leg measurements: femur I 1.15; patella I 0.49; tibia I 0.74; metatarsus I 0.53. tarsus I 0.41; femur II 1.23; patella II 0.49; tibia II 0.62; metatarsus II 0.57; tarsus II 0.49; femur III 0.62; patella III 0.29; tibia III 0.41; metatarsus III 0.41; tarsus III 0.25; femur IV 0.78; patella IV 0.31; tibia IV 0.36; metatarsus IV 0.41. tarsus IV 0.25. Leg spination: tibia I 2-2; metatarsus I 2-2; tibia II 2-2; metatarsus II 2-2 - 2ap. Palp as in Fig. 14View FIGURE 14.

Distribution. BOLIVIA: Beni; BRAZIL: Amazonas, Bahia  , Espírito Santo, Mato Grosso, Mato Grosso do Sul, Paraná, Rio de Janeiro, Rio Grande do Sul, Roraima; MEXICO: San Luis Potosí; PANAMA: Bocas Del Toro ( Fig. 20View FIGURE 20).

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

MCZ

Museum of Comparative Zoology

MCTP

Museu de Ciencias

MCN

McNeese State University

IBSP

Instituto Biologico de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Thomisidae

Genus

Epicadus

Loc

Epicadus planus Mello-Leitão, 1932

Silva-Moreira, Thiago Da & Machado, Miguel 2016

2016
Loc

Epicadus planus Mello-Leitão, 1932 : 73

Brignoli 1983: 604
Roewer 1954: 755Mello-Leitao 1940: 213Mello-Leitao 1932: 73

1954