Chrosiothes venturosus Marques & Buckup, 1997

Rodrigues, Everton Nei Lopes, 2017, Six new species and new records of the spider genus Chrosiothes from Brazil with the description of the female of Chrosiothes venturosus Marques & Buckup, 1997 (Araneae, Theridiidae, Spintharinae), Zootaxa 4329 (3), pp. 219-236 : 228

Chrosiothes venturosus Marques & Buckup, 1997

Figs. 16, 17 , 28 , 31

Chrosiothes venturosus Marques & Buckup, 1997: 184 , figs. 6, 7 ( Male holotype from Reserva Florestal Adolpho Ducke, Manaus, Amazonas, Brazil, 20.VIII.1991, H. Höfer leg., deposited in INPA, examined).

Diagnosis. The female is similar to those of C. murici new species by the larger spermathecae close to each other, and by the fertilization ducts closer from the posterior margin of epigynum ( Fig. 17 ), but differ by the spermathecae anteriorly coiled, and copulatory ducts opening posteriorly ( Fig. 17 ) while in C. murici new species the copulatory ducts open medianly ( Fig. 12 ), and by having the copulatory openings closer from the posterior margin of epigynum ( Fig. 16 ). Spermathecae, by transparency, cordiform in ventral view ( Fig. 16 ).

Description. Female (from São Gabriel da Cachoeira, MCN 46045). Total length 4.94. Carapace length 1.66, width 1.50. Clypeus height 0.31. Sternum length 1.04, width 0.78. Abdomen length 3.22, width 3.64, height 2.86. Leg formula IV/I/II/III; segment length (I/II/III/IV): femora 2.54/1.82/1.50/2.70; patellae+tibiae 2.60/1.71/1.30/ 2.60; metatarsi+tarsi 3.74/2.39/1.92/3.90; total 8.88/5.92/4.72/9.20. Carapace dark red-brown, eye region black ( Fig. 28 ). Chelicerae, sternum and coxae olive-brown. Leg I dark red-brown, legs II–IV half of femora yellow, other articles dark red-brown. PLE and PME with same diameter and smaller than other eyes; AME bigger than the other eyes. Abdomen wider than long, with two lateral-median tubercles, anterior median dorsum with transverse dark bands, posterior median with white spots ( Fig. 28 ). Ventrally dark brown, with depigmented spots. Spinnerets olive-brown. Epigynum with a slightly sclerotized plate, wider than long ( Fig. 16 ); spermathecae, by transparency, cordiform in ventral view ( Fig. 16 ) and copulatory openings closer from the posterior margin of epigynum ( Fig. 16 ). Internal genital with larger spermathecae, anteriorly coiled ( Fig. 17 ) and fertilization ducts shorts, uncoiled ( Fig. 17 ).

Male. See Marques & Buckup (1997).

Remarks. Males and females were collected at the same locality.

Material examined. Brazil. Amazonas: São Gabriel da Cachoeira, Parque Nacional do Pico da Neblina , Cachoeira do Tucano (00°48’07”N; 66°00’40”W) 100m, A. Nogueira leg., 22.IX.2007, 1F, night manual collection ( MCN 46045) ; D. Candiani leg., 22.IX.2007, 1F (MCN 46046); D. Candiani leg., 23.IX.2007, 1M, night manual collection (MCN 46047).

Distribution. Brazil (Amazonas).

Figures

FIGURES 16, 17. Chrosiothes venturosus Marques & Buckup, 1997: Female: 16, Epigynum, ventral, 17, Internal genitalia, dorsal, clarified. Scale bars, 0.25 mm.

FIGURES 24 – 28. Body, dorsal view. Chrosiothes murici new species: 24, Male, 25, Female. Chrosiothes decorus new species: 26, Female. Chrosiothes una new species: 27, Female. Chrosiothes venturosus Marques & Buckup, 1997: 28, Female. Scale bars, 1 mm.

FIGURES 7 – 12. Chrosiothes cicuta new species: 7, Male: Palp, ventral. 8 – 9, Female: 8, Epigynum, ventral, 9, Internal genitalia, dorsal, clarified. Chrosiothes murici new species: 10, Male: Palp, ventral. 11 – 12, Female: 11, Epigynum, ventral, 12, Internal genitalia, dorsal, clarified. Scale bars, 0.25 mm.