Chrosiothes cicuta, 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

publication ID

https://doi.org/10.11646/zootaxa.4329.3.2

publication LSID

lsid:zoobank.org:pub:252E55E4-A391-4970-8C77-34D8A5D1Caf0

persistent identifier

http://treatment.plazi.org/id/735587E6-FFB7-D22E-FF1B-FF63B110208C

treatment provided by

Plazi

scientific name

Chrosiothes cicuta
status

new species

Chrosiothes cicuta   new species

Figs. 7–9 View FIGURES 7 – 12 , 22, 23 View FIGURES 18 – 23 , 30

Type material. Holotype. Brazil: Rio de Janeiro, Volta Redonda, Floresta da Cicuta ( Cicuta’s Forest , 22°32’53”S; 44°5’34”W), 14.VI.2001, Equipe Biota leg., 1M, night manual collection ( IBSP 209888 View Materials ) GoogleMaps   . Paratypes. Brazil: Rio de Janeiro, Volta Redonda, Floresta da Cicuta ( Cicuta’s Forest , 22°32’53”S; 44°5’34”W), 14.VI.2001, Equipe Biota leg., 1F, night manual collection ( IBSP 209889 View Materials ) GoogleMaps   ; Rio de Janeiro, Volta Redonda, Cicuta’s Forest , 22°32’53”S; 44°5’34”W, 11.VI.2001, Equipe Biota leg., 1F, night manual collection ( IBSP 209890 View Materials ) GoogleMaps   ; Rio de Janeiro, Volta Redonda, Cicuta’s Forest , 22°32’53”S; 44°5’34”W, 14.VI.2001, Equipe Biota leg., 1M, 1F, night manual collection ( IBSP 209891 View Materials ) GoogleMaps   ; São Paulo, Ilhabela, Parque Estadual de Ilhabela , 23°51’7”S; 45°20’38”W, 14.X.2001, Equipe Biota leg., 1F ( IBSP 209892 View Materials ) GoogleMaps   ; São Paulo, Ilhabela, Parque Estadual de Ilhabela , 23°51’7”S; 45°20’38”W, 12.X.2001, Equipe Biota leg., 1F ( IBSP 209893 View Materials ) GoogleMaps   .

Etymology. The specific name is a noun in apposition taken from the type locality.

Diagnosis. Males are similar to C. perfidus Marques & Buckup, 1997   (see Marques & Buckup, 1997, fig. 2) by the embolus elongated, making one turn around tegulum, but differs from this species by the shape of the apical cymbium, curved ( Fig. 7 View FIGURES 7 – 12 ), while C. perfidus   , presents a subtriangular shape and the shape of embolus base, hooklike ( Fig. 7 View FIGURES 7 – 12 ). Females are similar to C. perfidus Marques & Buckup, 1997   (see Marques & Buckup, 1997, figs. 4, 5) by the copulatory ducts tightly coiled ( Figs. 8, 9 View FIGURES 7 – 12 ), but differ from this species by the copulatory opening rectangular and smaller ( Fig. 8 View FIGURES 7 – 12 ).

Description. Male holotype (from Cicuta’s Forest, IBSP 209888): Total length 1.84. Carapace length 0.88, width 0.75. Clypeus height 0.10. Sternum length 0.57, width 0.49. Abdomen length 1.04, width 0.70, height 0.54. Leg formula I/IV/II/III; segment length (I/II/III/IV): femora 1.26/0.92/0.50/1.11; patellae+tibiae 1.44/0.92/0.69/ 1.26; metatarsi+tarsi 1.78/1.11/0.92/1.82; total 4.49/2.96/2.12/4.20. Carapace pale orange, dark-brown pigments medially and laterally, semicircular, ( Fig. 22 View FIGURES 18 – 23 ). Chelicerae yellow. Sternum darker than the carapace, with dark brown edges. PLE smaller than other eyes, AME, ALE and PME with the same diameter. Legs pale orange, except femur III lighter than the others. Pentagonal abdomen with white and dark brown spots, two tubercles anteriorly, with a concave area, another pair of tubercles medially ( Fig. 22 View FIGURES 18 – 23 ), ventrally darker. Spinnerets pale orange. Palp with tegulum very developed non-sclerotized ( Fig. 7 View FIGURES 7 – 12 ). Embolus elongated and thin, making one turn around tegulum; embolus with enlarged base ( Fig. 7 View FIGURES 7 – 12 ). Conductor longer, pointed, with denticles along the edge ( Fig. 7 View FIGURES 7 – 12 ).

Female paratype (same locality as male, IBSP 209889): Total length 3.53. Carapace length 1.24, width 1.14. Clypeus height 0.18. Sternum length 0.77, width 0.63. Abdomen length 2.28, width 2.28, height 1.87. Leg formula IV/I/II/III; segment length (I/II/III/IV): femora 1.89/1.17/0.90/1.86; patellae+tibiae 1.89/1.23/0.94/1.99; metatarsi+tarsi 2.66/1.65/1.30/2.77; total 6.44/4.07/3.15/6.63. Carapace orange brown, semicircular, dark brown pigments medially and laterally ( Fig. 23 View FIGURES 18 – 23 ). Chelicerae orange-brown. Sternum dark brown. AME bigger than the others. Legs with coxae and trochanter yellow, remaining segments orange-brown. Pentagonal abdomen with white and dark brown spots dorsally, two tubercles anteriorly, with a concave area, another pair of tubercles medially ( Fig. 23 View FIGURES 18 – 23 ). Spinnerets pale-orange. Epigynum with a slightly sclerotized plate, wider than long ( Fig. 8 View FIGURES 7 – 12 ); copulatory opening rectangular ( Fig. 8 View FIGURES 7 – 12 ). Internal genital with smaller spermathecae, copulatory ducts tightly coiled ( Fig. 9 View FIGURES 7 – 12 ); fertilization ducts short and coiled ( Fig. 9 View FIGURES 7 – 12 ).

Remark. Males and females were collected together in various locations of Brazil.

Additional material examined. Brazil. Rio de Janeiro: Volta Redonda ( Floresta da Cicuta - Cicuta’s Forest , 22°32’53”S; 44°5’34”W), 8–15.VI.2001, Equipe Biota leg., 1M ( MCN 48675 View Materials ) GoogleMaps   ; São Paulo: Ubatuba (Ilha Anchieta, Parque Estadual da Ilha Anchieta , 23°32’S; 45°03’W), 23–30.VII.2001, Equipe Biota leg., 1M, 1F ( MCN 48674 View Materials ) GoogleMaps   .

Distribution. Brazil (Rio de Janeiro and São Paulo).

IBSP

Instituto Biologico de Sao Paulo

MCN

McNeese State University