Chrosiothes murici, Rodrigues, 2017

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 : 224-226

Chrosiothes murici new species

Figs. 10–12 , 24, 25 , 30

Type material. Holotype. Brazil: Alagoas, Murici, Estação Ecológica de Murici , 09°15’S; 35°51’W, 16.IX.2003, Equipe Biota leg., 1M, night manual collection ( IBSP 209894 ) . Paratypes Brazil: Alagoas, Murici, Estação Ecológica de Murici , 09°15’S; 35°51W, 18.IX.2003, Equipe Biota leg., 1F, night manual collection ( IBSP 209895 ) . Bahia, Una, Reserva Biológica de Una , 15°10’S; 39°03’W, 13.IV.1998, A. D. Brescovit leg, 1F ( IBSP 18243 ) .

Diagnosis. Males are similar to C. venturosus Marques & Buckup, 1997 (see Marques & Buckup, 1997, fig. 7) by the conspicuous conductor apex and by the shape of embolus base, but differ from this species by the absence of denticles along the edge of the conductor ( Fig. 10 ) and trajectory of the embolus that loop far from the tegulum edge ( Fig. 10 ). Females resemble those of C. jamaicensis Levi, 1964 (see Levi, 1964b, figs. 28, 29) by the presence of two copulatory openings ( Fig. 11 ) but differ by the openings farther from the posterior margin of epigynum ( Fig. 11 ) and by the larger reniform spermathecae ( Fig. 12 ).

Description. Male holotype (from Estação Ecológica de Murici, IBSP 209894). Total length 1.89. Carapace length 0.88, width 0.75. Clypeus height 0.14. Sternum length 0.56, width 0.44. Abdomen length 1.09, width 0.93, height 0.72. Leg formula I/IV/II/III; segment length (I/II/III/IV): femora 1.15/0.86/0.56/0.96; patellae+tibiae 1.32/ 0.84/0.63/1.13; metatarsi+tarsi 1.49/0.92/0.77/1.47; total 3.96/2.62/1.97/3.57. Carapace orange-brown with dark brown pigments medially and laterally, semicircular, cephalic area higher ( Fig. 24 ). Chelicerae orange-brown. Sternum darker. AME and ALE with same diameter, bigger than PME and PLE. Legs pale yellow with darkened spots. Pentagonal abdomen with a pair of lateral-median tubercles, dorsally with median-anterior portion dark brown and posterior-median portion pale yellow ( Fig. 24 ). Ventrally darker, with two longitudinal depigmented strips. Spinnerets pale yellow. Palp with conductor and embolus long, exceeding the margin of cymbium ( Fig. 10 ). Embolus with large base ( Fig. 10 ). Conductor without denticles and tegulum circular very developed nonsclerotized ( Fig. 10 ).

Female paratype (from Estação Ecológica de Murici, IBSP 209895). Total length 4.16. Carapace length 1.45, width 1.30. Clypeus height 0.21. Sternum length 0.84, width 0.67. Abdomen length 3.01, width 3.27, height 2.49. Leg formula I/IV/II/III; segment length (I/II/III/IV): femora 2.22/1.40/1.11/2.22; patellae+tibiae 1.99/1.44/1.19/ 1.80; metatarsi+tarsi 3.17/1.97/1.61/3.29; total 7.39/4.83/3.92/7.32. Carapace ( Fig. 25 ), chelicerae, sternum and legs dark red-brown, except femur III orange-brown. ALE and PLE with same diameter and smaller than the other eyes; PME and AME bigger than the other eyes. Abdomen ( Fig. 25 ) wider than long, with two median transverse brown bands and scattered brown spots and two lateral-median tubercles. Ventrally brown, with depigmented spots. Spinnerets orange-brown. Epigynum with a slightly sclerotized plate, wider than long ( Fig. 11 ); with two copulatory opening in the media-posterior portion of epigynum ( Fig. 11 ). Internal genital with larger reniform spermathecae ( Fig. 12 ); fertilization ducts short and coiled; copulatory ducts short and sclerotized ( Fig. 12 ).

Remark. Males and females were collected together in Estação Ecológica de Murici, Murici, Alagoas, Brazil.

Distribution. Brazil (Alagoas and Bahia).

Figures

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.

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.