Otoniela chica, Oliveira & De Alvarenga & Brescovit, 2023

Oliveira, Luiz Fernando M., De Alvarenga, José Geraldo G. & Brescovit, Antonio D., 2023, On the Neotropical spider genus Otoniela Brescovit, 1997 (Araneae: Anyphaenidae, Anyphaeninae), with the description of six new species, Zootaxa 5383 (1), pp. 1-23 : 10-12

Otoniela chica new species

Figs 6A–H ; 12A

Types. Male holotype from Punta Chica (34°26’58.56”S; 58°31’26.40”W), Buenos Aires, Argentina, 13.XII.1942, Equipe Prosen leg., deposited in MLP . Female paratype from Tigre (34°25’33”S; 58°35’48”W), Buenos Aires, Argentina, 07.XI.1943, deposited in MLP .

Etymology. The specific epithet is a toponymic in apposition and refers to the type locality.

Diagnosis. Males of Otoniela chica sp. nov. resemble those of O. lupercioi sp. nov. by the subtriangular and robust ventral tegular projection ( Figs 4C ; 5G, H ). They differ by the narrower base of ventral tegular projection and sperm duct oblique in ventral view ( Figs 6C, E ). Ventral tegular projection with a large base and truncated embolar basal apophysis in the palp in O. lupercioi sp. nov. ( Figs 4D, E ; 5G, H ). Females of Otoniela chica sp. nov. resemble those of O. lupercioi sp. nov. by the ample epigynal atrium and by the rounded, large spermathecae ( Figs 4F, G ; 5I ). They differ by the epigynum with sub-rectangular posterior lateral borders and, anterior field with invagination ( Figs 6G, H ). Epigynum with arc-shaped in posterior border in O. lupercioi sp. nov. ( Fig. 4F ).

Description. Male (Holotype, MLP). Carapace brown in the central area and border orange. Chelicerae brown. Endites and labium yellowish. Sternum orange. Legs orange, slightly darker distally on the tibiae. Abdomen orange with dark gray small longitudinal intercalated bands ( Fig. 6A ). Total length 5.9. Carapace 2.15 long, 1.6 wide. Clypeus 0.12. Eye diameters and interdistances: AME 0.10, ALE 0.10, PME 0.10, PLE 0.10, AME–AME 0.07, AME–ALE 0.04, PME–PME 0.18, PME–PLE 0.15, ALE–PLE 0.05. Chelicerae 0.92 long, with five promarginal teeth and five retromarginal denticles. Leg measurements: I—femur 1.65/ patella 0.7/ tibia 1.65/ metatarsus 1.5/ tarsus 0.65/ total 6.15; II—1.75/ 0.85/ 1.50/ 1.35/ 0.65/ 6.1; III—1.55/ 0.6/ 1.15/ 1.25/ 0.5/ 5.05; IV—2.0/ 0.75/ 1.75/ 2.05/ 0.70/ 7.25. Leg spination. I—tibia p1-1-1, metatarsus p0-1-0, r 0; II—tibia p1-1-1, metatarsus p1-0-0, r0; III—tibia v1-1-0, p1-1-0, r0-1-1, metatarsus v2-1-2; IV—tibia v1-2-2. Palp: retrolateral patellar apophysis bifid and short; apical prolateral tibial apophysis short and conical; retrolateral tibial apophysis elongated with constriction in the median region; tegulum longer than wide; ventral tegular projection broad and subtriangular, curved upwards, hook shaped; short median apophysis with ventrally curved apex; short embolus; apophysis of the base of the embolus short and pointed at apex ( Figs 6C–F ). Abdomen: length 2.6, epigastric furrow 0.7 from tracheal spiracle, spiracle 1.25 from base of spinnerets.

Female (Paratype, MLP). Coloration as male, but rather affected by drying ( Fig. 6B ). Total length 7.25. Carapace 2.5 long, 1.85 wide. Clypeus 0.08. Eye diameters and interdistances: AME 0.11, ALE 0.14, PME 0.11, PLE 0.11, AME–AME 0.06, AME–ALE 0.05, PME–PME 0.22, PME–PLE 0.18, ALE–PLE 0.10. Chelicerae 1.0 long, with six promarginal teeth and six retromarginal denticles. Leg measurements: I—femur 1.85/ patella 0.75/ tibia 1.85/ metatarsus 1.70/ tarsus 0.65/ total 6.8; II—1.75/ 0.85/ 1.55/ 1.3/ 0.55/ 6.0; III—1.45/ 0.6/ 1.15/ 1.25/ 0.55/ 5.0; IV—2.05/ 0.85/ 1.9/ 2.1/ 0.55/ 7.45. Leg spination: I—tibia p1-1-1, metatarsus p0-1-0, r0; II—tibia p1-1-1, metatarsus p1-0-0, r0; III—tibia v1-1-0, p1-1-0, r0-1-1, metatarsus v2-1-2; IV—tibia v1-2-2. Epigynum: rectangular lateral borders sclerotized; elliptical and wide atrium ( Fig. 6G ). Internally with short copulatory ducts; seminal receptacles inconspicuous, although not visible through transparency; spermathecae large, rounded and close together; Bennett’s glands inconspicuous; short fertilization ducts ( Fig. 6H ). Abdomen: length 4.0, epigastric furrow 1.1 from tracheal spiracle, spiracle 1.7 from base of spinnerets.

Variation. Males (n=3): total length 5.0–5.75; carapace length 2.15–3.0; femur I length 1.65–2.0.

Other material examined. ARGENTINA. Província de Buenos Aires: Atucha (33°58’18.47”S; 59°12’11.95”W), 1♂, 08.IX.1989, M.J. Ramírez leg. ( MACN-Ar) ; Delta do rio Arroyo Pajarito (34°24’28.98”S; 58°32’38.54”W), 1♂, 08.III.1953, A.O. Bachman leg. ( MACN-Ar) .

Distribution. Known only to the Province of Buenos Aires, Argentina ( Fig. 12A ).

Figures

FIGURE 4A–H. Otoniela lupercioi sp. nov.. Male (IBSP 29716): A habitus, dorsal view; C, D left palp, ventral view; E same, prolateral view; F same, retrolateral view. Female (IBSP 29715): B habitus, dorsal view; G epigynum, ventral view; H vulva, dorsal view. Abbreviations: A, atrium; EBA, embolar basal apophysis; CD, copulatory ducts; DPA, dorsal patellar apophysis; E, embolus; FD, fertilization ducts; LB, lateral borders; MA, median apophysis; PTA, prolateral tibial apophysis; RTA, retrolateral tibial apophysis; RPA, retrolateral patellar apophysis; S, spermatheca; ST, subtegulum, T, tegulum, VTP, ventral tegular projection. Scale bars: A 2.6mm; B 3.5mm; C, F, G 0.25mm; D, E 0.5mm.

FIGURE 5A–J. Otoniela lupercioi sp. nov.. Male (IBSP 79971): A chelicera, dorsal view; B chelicera, ventral view; C right chelicera, ventral view; D left palp, prolateral view; E same, ventral view; F same retrolateral view (arrow indicate the lyriform organ in the patella); G left palp, copulatory bulb, ventral view; H same, retrolateral view. Female (IBSP 279589): I vulva, dorsal view; J vulva, detail, dorsal view. Abbreviations: EBA, embolar base apophysis; BG, Bennett’s gland, CD, copulatory ducts; DPA, dorsal patellar apophysis; E, embolus; FD, fertilization ducts; GD, gland ducts; MA, median apophysis; PTA, prolateral tibial apophysis; RTA, retrolateral tibial apophysis; RPA, retrolateral patellar apophysis; S, spermathecae; SR, seminal receptacles; ST, subtegulum; T, tegulum; VTP, ventral tegular projection. Scale bars: A, B, D 0.5mm; C, H, I 0.1mm; E, F 0.2mm; G 0.3mm; J 0.04mm.

FIGURE 6A–H. Otoniela chica sp. nov.. Male (MACN-Ar): A habitus, dorsal view; C, D left palp, ventral view; E same, prolateral view; F same, retrolateral view. Female (MLP): B habitus, dorsal view; G epigynum, ventral view; H vulva, dorsal view.Abbreviations:A, atrium; EBA, embolar base apophysis; CD, copulatory ducts; DPA, dorsal patellar apophysis; E, embolus; FD, fertilization ducts; LB, lateral borders; MA, median apophysis; PTA, prolateral tibial apophysis; RTA, retrolateral tibial apophysis; RPA, retrolateral patellar apophysis; S, spermatheca; ST, subtegulum, T, tegulum; VTP, ventral tegular projection. Scale bars: A, B 2.16mm; C, F, G 0.25mm; D, E 0.6mm.

FIGURE 12 A–B. Distribution map of Otoniela species.