Nesticus bacchus, Estol, Narelle & Rodrigues, Everton Nei Lopes, 2017

Estol, Narelle & Rodrigues, Everton Nei Lopes, 2017, A new species and a new record of the spider genus Nesticus (Araneae, Nesticidae) from southern Brazil, Zootaxa 4231 (4), pp. 564-566: 564-566

publication ID

https://doi.org/10.11646/zootaxa.4231.4.4

publication LSID

lsid:zoobank.org:pub:75805925-DA13-4F41-A5E6-55E5C00B95BF

persistent identifier

http://treatment.plazi.org/id/C52787B1-FFDB-F816-17D4-F94FFD15FFF2

treatment provided by

Plazi

scientific name

Nesticus bacchus
status

new species

Nesticus bacchus  new species

( Figs. 1View FIGURES 1 – 5 –6)

Type material. Holotype. Male from Brazil, state of Rio Grande do Sul, Candiota ( Fazenda Miolo , Fortaleza do Seival , 

31°23’S 53°45’W, 220m a.s.l.), 22.IX.2009, J.L.O Rosado leg., deposited in MCN 56407View Materials. Paratypes: female, same dataGoogleMaps 

as the holotype, 4.X.2010, deposited in MCN 56408; male, same data as the holotype, 17.V.2010, deposited in IBSP 

167863; male, same data as the holotype, 25.XI.2011, deposited in MCTP 39511; all collected by pitfall traps. Etymology. The specific name is taken after Bacchus  , the Roman god of wine and agriculture, in reference to the

occurrence of this species in vineyards.

Diagnosis. The male of Nesticus bacchus  new species resembles that of N. calilegua Ott & Lise, 2002  (see Ott & Lise 2002: 67, figs 27–29) in the shape of the tegular process, distal portion of the conductor, tegulum and paracymbium processes, but differs in the longer tegular process surpassing the margin of cymbium in ventral view ( Fig. 1View FIGURES 1 – 5), by the trajectory of the sperm duct in the tegulum ( Fig. 1View FIGURES 1 – 5), the paracymbium dorsal process pointed and hook-shaped, and the ventral process larger and distal portion of the conductor which is wider and with a blunt end in N. bacchus  new species ( Fig. 1View FIGURES 1 – 5) in contrast with slimmer and more pointed in N. calilegua Ott & Lise, 2002  (see Ott & Lise 2002: 67, fig. 28). Nesticus bacchus  new species females resemble N. calilegua Ott & Lise, 2002  (see Ott & Lise 2002: 67, figs 25, 26) in the reniform spermathecae with coiled copulatory ducts, but differs in the shape of posterior margin of median septum, wide anteriorly ( Fig. 5View FIGURES 1 – 5) and spermathecae more separated from each other, in ventral view ( Fig. 5View FIGURES 1 – 5).

Description. Male holotype. Total length 2.34. Carapace length 0.98, width 0.78. Clypeus height 0.06. Chelicerae length 0.42, width 0.16. Sternum length 0.51, width 0.47. Abdomen length 1.24, width 1.09, height 1.09. Leg formula I/ IV/II/III; segment length (I/II/III/IV): femora 1.29/1.08/0.85/1.29; patellae 0.37/0.37/0.34/0.37; tibiae 1.22/0.68/0.57/ 1.12; metatarsi 1.15/0.85/0.68/1.02; tarsi 0.61/0.54/0.51/0.57; total 4.64/3.52/2.95/4.37. Palpus: femur 0.47; patella 0.13; tibia 0.17; cymbium 0.40; total 1.17. Carapace ( Fig. 4View FIGURES 1 – 5) pale-yellow. Thoracic fovea circular, inconspicuous. Eyes with dark borders. ALE and PLE larger than the other eyes, AME smaller. Sternum longer than wide, yellow, margins brown. Chelicerae and endites pale-yellow. Labium wider than long, pale-yellow. Legs ( Fig. 4View FIGURES 1 – 5) pale-yellow. Abdomen ( Fig. 4View FIGURES 1 – 5) longer than wide, oval, yellow. Spinnerets pale-yellow. Palpal tibia developed. Paracymbium with prominent ventral process strongly sclerotized, median process pointed and dorsal process hook-shaped, larger than the other processes and pointed ( Figs 1, 2View FIGURES 1 – 5). Tegular process in prolateral position, developed and not curved ( Figs 1, 3View FIGURES 1 – 5). Embolus long and filiform ( Figs 1–3View FIGURES 1 – 5). Sperm duct in the tegulum with S-shaped trajectory in ventral view ( Fig. 1View FIGURES 1 – 5). Conductor developed, with distal portion and ventral portion elongated ( Figs 1–3View FIGURES 1 – 5).

Female. Paratype. Total length 2.49. Carapace length 1.04, width 0.88. Clypeus height 0.16. Chelicerae length 0.46, width 0.20. Sternum length 0.57, width 0.57. Abdomen length 1.61, width 1.24, height 1.24. Leg formula I/IV/II/ III; segment length (I/II/III/IV): femora 1.25/0.91/0.74/1.15; patellae 0.37/0.34/0.30/0.34; tibiae 1.12/0.85/0.57/1.19; metatarsi 0.91/0.71/0.57/0.91; tarsi 0.61/0.51/0.40/0.54; total 4.26/3.32/2.58/4.13. Palpus: femur 0.40; patella 0.10; tibia 0.32; tarsi 0.37; total 1.19. Carapace pale-yellow. Thoracic fovea circular, inconspicuous. Eyes with dark borders. ALE and PLE larger than the other eyes, AME smaller. Sternum longer than wide, yellow with brown spots mainly on the edges. Chelicerae and endites yellow. Labium wider than long, pale-yellow. Legs pale-yellow. Abdomen longer than wide, oval, dorsum yellow, sides with longitudinal brown spots, venter with brown spots. Spinnerets pale-yellow. Palpal tarsus with long claw. Epigynum with median septum wide, with copulatory opening in posterior-median portion of epigynal plate ( Fig. 5View FIGURES 1 – 5) and reniform spermathecae with long and coiled copulatory ducts (Fig. 6) and fertilization ducts in posterior portion of epigynum, arising from posterior region of spermathecae (Fig. 6).

Remarks. Males and female were collected together in vineyards ( Vitis vinifera Linnaeus (1758)  cv Cabernet Sauvignon), with pitfall traps.

Distribution. Brazil (Rio Grande do Sul).

MCN

McNeese State University

IBSP

Instituto Biologico de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Nesticidae

Genus

Nesticus