Epicadus camelinus ( O. Pickard-Cambridge, 1869 ),

Machado, Miguel, Teixeira, Renato Augusto & Lise, Arno Antonio, 2018, There and back again: More on the taxonomy of the crab spiders genus Epicadus (Thomisidae: Stephanopinae), Zootaxa 4382 (3), pp. 501-530: 506-507

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Epicadus camelinus ( O. Pickard-Cambridge, 1869 )


Epicadus camelinus ( O. Pickard-Cambridge, 1869) 

Figs 2A –DView FIGURE 2, 16DView FIGURE 16

Stephanopis camelina O. Pickard-Cambridge, 1869: 64  , pl. 5, figs 44–49.

Tobias camelinus (O. Pickard-Cambridge)  . Simon 1895: 1053.

Tobias martinezi Birabén, 1955: 74  , figs 1–4 (holotype female from Buenavista [17°27'32"S, 63°39'33"W, Santa Cruz, Bolivia], deposited in MLPA 0 400, examined).GoogleMaps 

Epicadus camelinus ( O. Pickard-Cambridge, 1869)  . Machado et al. 2017: 448, figs. S4C, S6B, S15C

Type material: Holotype: female, “Amazon”, 1861, Bates (OUMNH 122, examined).

Other material examined. BRAZIL: Amazonas: 5 ♀, 3°25'00"S, 65°51'21"W, ( MNHN 2617View Materials ex.)GoogleMaps  . Acre: 1 ♀, Senador Guiomard , 10°04'24''S, 67°37'26''W, November 2010, G.H.F. Azevedo & A.J. Santos ( UFMG 11007View Materials)GoogleMaps  . Paraná: 1 ♀, Santa Helena ( Refúgio Biológico Bela Vista ), 25°26'56"S, 54°33'24"W, 12–16 October 1991, A.B. Bonaldo ( MCNZ 21767View Materials)GoogleMaps  .

Diagnosis. Females of E. camelinus  resemble those of E. trituberculatus  in the shape and disposition of opisthosomal projections but can be distinguished by large brown stains on prosoma and femur I and by the Vshaped mark on patella I ( Figs 2A, BView FIGURE 2, 16DView FIGURE 16). The epigynum in ventral view is also very similar with other species of the genus (especially with E. trituberculatus  ) but is characterized by the straight lateral folds delimiting a deeper median field, by the copulatory openings being totally exposed and by the reduced secondary spermathecae ( Figs 2C, DView FIGURE 2).

Description. Female (from Senador Guiomard; UFMG 11007): Anterior eye row strongly recurved, posterior eye row slightly procurved, almost straight. Prosoma as long as wide, MS and TWS present, LBL extends longitudinally to the PME ( Fig. 2AView FIGURE 2). Clypeus brownish, wide and bearing a black upside down V-shaped mark ( Fig. 2BView FIGURE 2); chelicerae, sternum, endites, and labium yellowish. Opisthosoma yellowish with brown stains, presenting several black knobs and five opisthosomal projections faced backward ( Figs 2AView FIGURE 2, 16DView FIGURE 16). Median posterior opisthosomal projection larger than lateral ones, distally enlarged, ending in two roundish tips. In posterior view, between the dorsolateral and ventrolateral projections, there is a black triangular stain ( Figs 2AView FIGURE 2, 16DView FIGURE 16). Anterior border of opisthosoma strongly concave. Femora II with black spots on prolateral surface, one on median and another on distal position. Legs I and II with a median keel including the entire patella to the tarsal joint; anterior tibiae (I and II) with a dorsal naked gutter connected to the sensorial pit. Femora I and II with two ventral lines of setiferous tubercles. Tarsal claws curved and pectinated with teeth restricted to basal portion. Epigynum with an incomplete median septum, secondary spermathecae reduced and primary spermathecae globular; copulatory ducts long, exceeding the length of primary spermathecae) ( Figs 2C, DView FIGURE 2).

Measurements: eye diameters and interdistances: AME 0.10, ALE 0.14, PME 0.10, PLE 0.08, AME –AME 0.26, AME –ALE 0.12, PME –PME 0.36, PME –PLE 0.18; MOQ length 0.58, MOQ posterior width 0.58, MOQ anterior width 0.56; leg formula: 1-2-4-3: leg I—femur 3.50/ patella 2.00/ tibia 2.35/ metatarsus 1.75/ tarsus 1.40/ total 11.00; II—3.50/ 2.00/ 2.30/ 1.60/ 1.40/ 10.80; III—1.70/ 1.15/ 1.20/ 1.40/ 0.60/ 6.05; IV—1.90/ 1.05/ 1.50/ 1.35/ 0.60/6.40. Total body length 7.75; prosoma length 3.75, width 3.75; opisthosoma length 4.00; clypeus height 0.50; sternum length 1.68, width 1.16; endites length 1.08, width 0.50; labium length 0.66, width 0.60.

Distribution. BRAZIL: Acre, Amazonas; BOLIVIA: Santa Cruz ( Fig. 17CView FIGURE 17).

Note. The male of E. camelinus  is still unknown. The scanning microscopy of a male palp represented in the supplementary material of Machado et al. (2017) ( Fig. S12BView FIGURE 12) was a lapsus, being in fact that copulatory structure belonging to a male of E. taczanowskii  .


Universidade Federal de Minas Gerais


Maria Curie-Sklodowska University














Epicadus camelinus ( O. Pickard-Cambridge, 1869 )

Machado, Miguel, Teixeira, Renato Augusto & Lise, Arno Antonio 2018

Stephanopis camelina

O. Pickard-Cambridge, 1869 : 64

Tobias camelinus

Simon 1895 : 1053

Epicadus camelinus (

Machado et al. 2017 : 448