Epicadus granulatus Banks, 1909

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: 510-513

publication ID

https://doi.org/10.11646/zootaxa.4382.3.4

publication LSID

lsid:zoobank.org:pub:87A2B333-09FF-4726-A1EF-0699FB631808

persistent identifier

http://treatment.plazi.org/id/501D87B1-6734-A430-2390-F95152BBBC7A

treatment provided by

Plazi

scientific name

Epicadus granulatus Banks, 1909
status

 

Epicadus granulatus Banks, 1909 

Figs 5A –DView FIGURE 5, 6A –DView FIGURE 6, 15DView FIGURE 15

Epicadus granulatus Banks, 1909: 214  , pl. 6, fig. 25. Silva-Moreira & Machado 2016: 300; Machado et al. 2017: 448, figs S4F, S8D. S15D.

Tobias inermis Mello-Leitão, 1929: 84  , figs. 177–178 (syntypes, 4 females from Rio Içá [6°28'56"S, 76°22'21"W, Tarapoto , Peru], deposited in MNHN 3403View Materials, examined).GoogleMaps 

Type material: Holotype (original designation): female, Surubres [9°35'55"N, 84°18'07"W, Puntarenas, Costa Rica], ( MCZ 21488View Materials, examined).GoogleMaps 

Other material examined: BRAZIL: Pará: 1 male, Novo Progresso, Campo de Provas Brigadeiro Velloso , 9°20′00"S, 54°57′53″W, 15 September 2003, D.R. Santos-Souza ( MPEG 005373View Materials).GoogleMaps 

Note. Here we describe the male of E. granulatus  for the first time. The locality of the single male examined and described here is distant from the terra typical of both, E. granulatus  and its junior synonym inermis  . We assume conspecifity of both sexes by a number of shared morphological features: 1) the reddish and nodose prosoma, 2) pale-yellow opisthosoma with vestigial lateral projections, 3) reduced eyes and high clypeus. Moreover, the male undoubtly belongs to the “ pustulosus  clade” as proposed by Machado et al. (2017). It shows similar setiferous tubercles on the dorsum of the prosoma as the other species of that clade, E. pustulosus  and E. caudatus  .

Diagnosis. Females of E. granulatus  are related to those of E. caudatus  and E. pustulosus  by the straight anterior border of opisthosoma and quadratic aspect of legs, and to E. camelinus  by the curvature of copulatory ducts, shape and size of the spermathecae. However, it can be easily recognized by the reduced eyes, high clypeus ( Figs 5BView FIGURE 5), round opisthosoma with no lower lateral opisthosomal projections and vestigial lateral ones and by the transversal stains on femora I and II with leg segments getting gradually darker from the patellae to tarsi ( Figs 5AView FIGURE 5, 15DView FIGURE 15). The epigynum is distinguished from those of other species by the elevated median field and a large septum that resembles a shape of a “pig snout” in ventral view ( Fig. 5CView FIGURE 5). The male presents a pair of vertical ocular mounds on the ALE, similarly to males of E. heterogaster  , and the opisthosoma have only three projections as in males of E. trituberculatus  and E. taczanowskii  . From those it can be distinguished by the granulose prosoma with a set of tubercles on the thoracic area (which is more similar to those of E. caudatus  and E. pustulosus  ) ( Figs 6A, BView FIGURE 6) and by the palp with TF at seven o’clock position ( Fig. 6CView FIGURE 6).

Description. Female (from Tarapoto; MNHN 3403): Anterior eye row recurved and posterior procurved. Prosoma orange, without dark stripes or whitish stains and with scattered granules ( Figs 5A, BView FIGURE 5). Thoracic MS discrete (sometimes absent). Chelicerae, sternum, endites and labium orange. Opisthosoma predominantly dark brown and gnarled, with three opisthosomal projections—median posterior bigger than lateral ones and rounded, lateral ones reduced ( Figs 5AView FIGURE 5, 15DView FIGURE 15). Epigynum in ventral view with a large septum and an elevated median field ( Fig. 5CView FIGURE 5); secondary spermathecae reduced and primary ones well developed and globular ( Fig. 5DView FIGURE 5).

Measurements: eye diameters and interdistances: AME 0.13, ALE 0.16, PME 0.13, PLE 0.10, AME –AME 0.54, AME –ALE 0.20, PME –PME 0.72, PME –PLE 0.18; MOQ length 0.75, MOQ posterior width 0.76, MOQ anterior width 0.74; leg formula: 1-2-4-3: leg I—femur 5.67/ patella 3.08/ tibia 3.50/ metatarsus 2.42/ tarsus 1.67/ total 16.34; II—4.84/ 2.91/ 3.50/ 2.25/ 1.25/ 14.75; III—2.75/ 1.75/ 1.75/ 1.42/ 0.84/ 8.51; IV—3.00/ 1.58/ 2.08/ 1.67/ 0.84/ 9.17. Total body length 10.34; prosoma length 5.75, width 5.62; opisthosoma length 4.58; clypeus height 0.88; sternum length 2.62, width 2.00; endites length 1.10, width 0.70; labium length 0.82, width 0.90.

Male (from Novo Progresso; MPEG 005373): Eye arrangement as in females, ALE on vertical and spiniform ocular mounds; prosoma dark orange with remarkable tubercles on thoracic area ( Figs 6A, BView FIGURE 6). Sternum, labium and endites light orange; clypeus high, entirely dark orange, with no marks or spots. Opisthosoma light yellow with dark setae and three projections: lateral ones indistinct and median posterior stout and rounded ( Fig. 6AView FIGURE 6). Legs entirely light orange; femora I bears conspicuous setiferous tubercles on its ventral and dorsolateral surface. Palpi with discoid tegulum, RTA with tip bended retrolaterally and DTA directed upwards ( Fig. 6DView FIGURE 6); TF emerging from tegulum at seven o’clock ( Fig. 6CView FIGURE 6).

Measurements: eye diameters and interdistances: AME 0.06, ALE 0.06, PME 0.05, PLE 0.04, AME –AME 0.16, AME –ALE 0.10, PME –PME 0.24, PME –PLE 0.10; MOQ length 0.30, MOQ posterior width 0.25, MOQ anterior width 0.24; leg formula: 1-2-4-3: leg I—femur 1.36/ patella 0.56/ tibia 0.80/ metatarsus 0.62/ tarsus 0.46/ total 3.80; II—0.98/ 0.56/ 0.78/ 0.59/ 0.44/ 3.35; III—0.58/ 0.34/ 0.42/ 0.35/ 0.24/ 1.93; IV—0.56/ 0.23/ 0.48/ 0.44/ 0.26/ 1.97. Total body length 2.74; prosoma length 1.46, width 1.36; opisthosoma length 1.28; clypeus height 0.36; sternum length 0.66, width 0.60; endites length 0.30, width 0.16; labium length 0.20, width 0.26.

Distribution. PERU: Tarapoto; BRAZIL: Amazonas; COSTA RICA: Surubres ( Fig. 17AView FIGURE 17).

MCZ

Museum of Comparative Zoology

MNHN

Museum National d'Histoire Naturelle

MPEG

Museu Paraense Emilio Goeldi

PERU

Universit� di Perugia

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Thomisidae

Genus

Epicadus

Loc

Epicadus granulatus Banks, 1909

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

Epicadus granulatus

Banks, 1909 : 214
Silva-Moreira & Machado 2016 : 300
Machado et al. 2017 : 448
Loc

Tobias inermis Mello-Leitão, 1929 : 84

Mello-Leitão, 1929 : 84