Euryopis boliviensis, Rodrigues & Marta & Figueiredo, 2021

Rodrigues, Everton Nei Lopes, Marta, Kimberly S. & Figueiredo, Cassiano P., 2021, Description of four new species of the spider genus Euryopis Menge, 1868, with new records from Brazil (Araneae, Theridiidae, Hadrotarsinae), Zootaxa 4966 (5), pp. 535-549 : 541-543

Euryopis boliviensis new species

Figs. 5 A–D , 6 A–D , 8C , 9E, F , 10

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Type material. Holotype. Bolivia: La Paz Department, Murillo (Mecapaca 16°39’51.5”S, 68°00’56.6”W), III.1980, 1M ( MCN 25528) . Paratype: La Paz Department, Murillo (Mecapaca 16°39’51.5”S, 68°00’56.6”W), III.1980, 1F ( MCN 25528) .

Etymology. The specific name is derived from the type locality.

Diagnosis. Males of Euryopis boliviensis n. sp. resemble those of Euryopis nasuta , but E. boliviensis n. sp. differs from E. nasuta in having the apical portion of the conductor with a thin hook-like projection ( Fig. 8C ), absent in E. nasuta , and by the absence of nose-like projection in the clypeus, present in the latter. Females of the E. boliviensis n. sp. resemble those of E. nasuta , but differ by having the second spermathecae further apart ( Figs 9E, F ), and closer to each other in the E. nasuta , and by a larger and more sclerotized copulatory opening ( Fig. 9E ) than in E. nasuta .

Description. Male holotype (MCN 25528). Total length 2.33. Carapace length 0.94, width 0.77, clypeus height 0.33. Sternum length 0.50, width 0.46. Abdomen length 1.19, width 0.86, height 0.58. Leg formula IV/I/II/ III; segment length (I/II/III/IV): femora 0.63/0.60/0.56/0.73; patellae+tibiae 0.79/0.73/0.69/0.88; metatarsi+tarsi 0.84/0.79/0.79/0.94; total 2.26/2.12/2.04/2.55. Carapace oval ( Fig. 5A ), orange brown. Ocular region slightly pronounced, eyes with black margins ( Fig. 5C ). Eye diameter and interdistances: AME 0.02, PME 0.04, ALE 0.04, PLE 0.06, AME–AME 0.04, AME–ALE 0.02, PME–PME 0.06, PME–PLE 0.04. Fovea marked dark brown ( Fig. 5A ). Sternum scutiform ( Fig. 5B ), yellow, lighter than the carapace. Legs yellow with blackish pigment on the sides, except on the coxae and trochanter. Pedicel elongated with two longitudinal blackened bands ( Fig. 5A, 5B, 5D ). Abdomen oval ( Fig. 5A, 5B ), dorsally brown with irregular yellow pattern. In ventral view, predominantly yellow with a blackened spot in median-anterior area and two blackened spots on the posterior laterals. Spinnerets yellow. Palp with cymbium oval in dorsal view; the conductor distally hook-shaped and embolus apically sclerotized ( Fig. 8C ); conductor enlarged, and median apophysis with loop-like duct ( Fig. 8C ).

Female paratype (MCN 25528). Total length 2.54. Carapace length 0.96, width 0.79. Clypeus height 0.14. Sternum length 0.56, width 0.44. Abdomen length 1.65, width 1.05, height 0.94. Leg formula IV/I/III/II; segment length (I/II/III/IV): femora 0.73/0.65/0.60/0.71; patellae+tibiae 0.88/0.79/0.81/1.05; metatarsi+tarsi 0.92/0.73/0.77/1.00; total 2.53/2.17/2.18/2.76. Carapace ( Fig. 6A ) yellow, oval, with blackish edges. Ocular region slightly bulged, eyes with black margins ( Fig. 6C ). Eye diameter and interdistances: AME 0.06, PME 0.06, ALE 0.06, PLE 0.06, AME–AME 0.04, AME–ALE 0.02, PME–PME 0.06, PME–PLE 0.04. Sternum scutiform ( Fig. 6B ), yellow with blackened edges. Pedicel yellow with two longitudinal blackened bands ( Fig. 6A ). In dorsal view, abdomen longer than wide ( Fig. 6A, 6B ), sparse setae, predominantly yellow with irregular pattern of dark brown spots. In ventral view abdomen yellow with two black spots on the posterior laterals ( Fig. 6B ). Spinnerets yellow. Epigynum with a slightly sclerotized plate, longer than wide ( Fig. 9E ). Internal genitalia with two pairs of round spermathecae with the similar size, first pair of spermathecae slightly larger ( Fig. 9F ), short and coiled fertilization ducts ( Fig. 9F ) and uncoiled copulatory ducts ( Fig. 9F ).

Natural history. Unknown.

Distribution. Bolivia (La Paz, Fig. 10 ).

Figures

FIGURE 5. Euryopis boliviensis n. sp. A–D. Male habitus: A, Dorsal view. B, Ventral view. C, Frontal view. D, Lateral view. Scale bars: 1 mm.

FIGURE 6. Euryopis boliviensis n. sp. A–D. Female habitus:A, Dorsal view. B, Ventral view. C, Frontal view. D, Lateral view. Scale bars: 1 mm.

FIGURE 8. Male palp Euryopis n. sp., ventral view. A, Euryopis candiota n. sp. B, Euryopis nasuta n. sp. C, Euryopis boliviensis n. sp. D, Euryopis catarinensis n. sp. Abbreviations: Cy, cymbium; E, embolus; MA, median apophysis, ST, subtegulum; T, tegulum. Scale bars: 0.25 mm.

FIGURE 9. Epigyna of new species of Euryopis. A, B. Euryopis candiota n. sp. A, Ventral view. B, Dorsal view, clarified. C, D. Euryopis nasuta n. sp.: C, Ventral view; D, Dorsal view, clarified. E, F. Euryopis boliviensis n. sp. E, Ventral view; F, Dorsal view, clarified. Abbreviations: CD, copulatory ducts; CO, copulatory openings; FD, fertilization ducts; SS, second pair of spermathecae; FS, first pair of spermathecae. Scale bars: 0.25 mm.

FIGURE 10. Distribution of the new species and new records of genus Euryopis in Brazil and Bolivia.