Attacobius tremembe, Pereira-Filho & Saturnino & Bonaldo, 2018

Pereira-Filho, José Moisés B., Saturnino, Regiane & Bonaldo, Alexandre B., 2018, Five new species and novel descriptions of opposed sexes of four species of the spider genus Attacobius (Araneae: Corinnidae), Zootaxa 4462 (2), pp. 211-228 : 224-226

Attacobius tremembe n. sp.

Figs 22–24 ; Map 2

Type material. ♀ holotype from Distrito de Irrigação dos Tabuleiros Litorâneos do Piauí [02°54'19.96"S, 41°46'24.11"W], Parnaíba, Piauí, Brazil, 2008, J.A.S. Cunha leg. ( IBSP 144009 ) .

Etymology. The specific name refers to the Tremembé, an indigenous nation that occupied the Delta of the Parnaíba River.

Diagnosis. Females of Attacobius tremembe n. sp. are similar to those of A. attarum Roewer , A. nigripes (Mello-Leitão) and A. kitae Bonaldo & Brescovit by the presence of a small, continuous ventral epigynal plate ( Platnick & Baptista 1995: figs 12, 18; Bonaldo & Brescovit 2005: fig. 21). They differ from those of A. attarum and A. kitae by the smaller secondary spermathecae and from those of A. nigripes by the presence of unsclerotized copulatory ducts ( Figs 22–24 ).

Description. Female (holotype, IBSP 144009). Carapace dark yellow, with black spot on each anterior median eye area; chelicerae and fangs dark yellow; endites pale yellow with white apex; labium dark yellow; sternum pale yellow with brown margins; legs: femur and patella yellow, tibiae, metatarsus and tarsus pale orange; abdomen pale grey. Total length 3.1. Carapace 1.47 long, 1.25 wide, 0.42 high. Clypeus 0.13 high. Eye diameters and interdistances: AME 0.10, ALE 0.10, PME 0.10, PLE 0.10; AME–AME 0.07, AME–ALE contiguous, PME–PME 0.12, PME–PLE 0.06, ALE–PLE contiguous. MOQ length: 0.25, front width: 0.27, back width: 0.25. Chelicerae 0.40 long, with 3 promarginal and 2 retromarginal teeth. Sternum 0.83 long, 0.87 wide. Abdomen 1.69 long, 1.13 wide. Leg measurements: I: lost. II: 1.21/ 0.49/ 1.03/ 1.17/ 0.91/ 4.81. III: 1.14/ 0.47/ 1.00/ 1.16/ 0.89/ 4.66. IV: 1.41/ 0.49/ 1.24/ 1.37/ 0.98/ 5.49. Leg spination: I: lost. II: femur d1-1-0, p0, r0, v0; tibia d0, p0, r0, v0-2-2; metatarsus d0, p0, r0, v2.2.0. III: femur d1-1-0, p0, r0, v0; tibia d0, p0, r0, v0; metatarsus d0, p0, r0, v0. IV: femur d1-1-0, p0, r0, v0; tibia d0, p0, r0, v0; metatarsus d0, p0, r0, v0. Epigynum: ventral surface medially excavated; ventral plate continuous, small; posterior transverse septum present; dorsal extension of epigynal posterior plate reduced; copulatory openings ventral, medially placed; copulatory ducts translucent, spermathecae separated from each other; primary spermathecae relatively large, rounded; secondary spermathecae present, tapering anteriorly ( Figs 22–24 ).

Male. Unknown.

Distribution. State of Piauí, Brazil (Map 2).

Material examined. Only the type.

Figures

FIGURES 19–24. Attacobius spp., female epigyna: 19–21. A. blakei Bonaldo & Brescovit, 2005, 19. ventral view, 20. posterior view, 21. dorsal view; 22–24. A. tremembe n. sp., 22. ventral view, 23. posterior view, 24. dorsal view. Abbreviations: CD, copulatory duct; EVP, epigynal ventral plate; FD, fertilization duct; PS, primary spermathecae; SS, secondary spermathecae.