Arctosa villa, Paredes-Munguía & Brescovit & Teixeira, 2024
publication ID |
https://doi.org/ 10.11646/zootaxa.5414.1.1 |
publication LSID |
lsid:zoobank.org:pub:3B1DFADA-C20E-473B-A5E9-843548B54AD3 |
persistent identifier |
https://treatment.plazi.org/id/03E887D2-BA3F-FE14-FDDB-FE5B642BFDEE |
treatment provided by |
Plazi |
scientific name |
Arctosa villa |
status |
sp. nov. |
Arctosa villa sp. nov.
Figs 44‒49 View FIGURE 44 View FIGURE 45 View FIGURE 46 View FIGURE 47 View FIGURE 48 View FIGURE 49 , 64 View FIGURE 64
Arctosa View in CoL sp. nov.: Paredes-Munguia 2012: 42
Type Material. Male holotype from Pantanos de Villa , Chorrillos , Lima, Peru, 13.xi.1994. S. Córdova & J. Duarez leg. ( MUSM-ENT 500104 ), female paratype, from Totorales , Pantanos de Villa, Chorrillos, Lima, Peru, 12°12'22.0"S 76°59'19.5"W, ± 24 m, 12.xi.2006. W. Paredes & C. Ruiz leg. ( MUSM-ENT 500107 ) GoogleMaps .
Other material examined. PERU: Lima: 1♂, Pantanos de Villa—Totorales , 12°12'22"S 76°59'19.5"W, 24 m, 12.xi.2006, W. Paredes & C. Ruiz leg. ( MUSM-ENT 514161 ) GoogleMaps ; 1♂ 2♀, ditto, 23.xii.2003, W. Paredes leg. ( MUSM-ENT 505002 ) GoogleMaps ; 5♀, ditto, 12.x.2003, W. Paredes leg. ( MUSM-ENT 500108 ) GoogleMaps ; 1♂ 2♀, Pantanos de Villa 21.vii.1994, D. Silva & J. Duarez leg. ( MUSM-ENT 500106 ) ; 1♂ 1♀, Cañete, Planta de Licuefacción Pampa Melchorita , 13°14'55,8"S 76°17'16.5"W, 146 m, 9–12.i.2013, V. Borda leg. ( MUSM-ENT 507296 ) GoogleMaps . Lambayeque: 1♀, Lambayeque, Campo de cultivo Instituto de Desarrollo agrícola de Lambayeque ( IDAL) , Road to Ferreñafe , 6°40'12.32"S 79°47'6.58"W, 37 m, C. Albujar leg. ( MUSM-ENT 505355 ) GoogleMaps .
Etymology. The specific name is a noun in apposition from the type-locality, the Pantanos de Villa Reserved Zone, a salt marsh at the southern Lima, one of the most important salt marshes in the Peruvian central coast.
Diagnosis. Males of Arctosa villa can be recognized among all the neotropical species by the wide base of posterior arm of the median apophysis (Pa) ( Fig. 44a, f View FIGURE 44 ), and the membranous, thick palea protuberance (Pp) ( Fig. 45a, e View FIGURE 45 ). The Arctosa sapiranga median apophysis resemble that of A. villa , but the base of the posterior arm of the median apophysis is thinner in the former. Females of A. villa can be recognized by the transversal septum straight ( Fig. 46a View FIGURE 46 ), and the triangular head of spermatheca ( Fig. 46b View FIGURE 46 ). Female epigynal plate of Arctosa perita ( Latreille, 1799) ( Dondale & Redner 1983a: figs 46, 49) and A. sapiranga ( Silva & Lise 2009: figs 9, 10) look like that of A. villa sp. nov., but it is wider anteriorly in A. villa .
Description. Male. Holotype (MUSM-ENT 500104). Carapace brown to light brown with pale black radiating lines covered with short black setae; median band yellow with a few bristles, two blurry parallel yellow lines in the longitudinal median band just behind the ocular area and pale yellowish irregular sub marginal band. Sternum longer than wide, yellow, and covered with short brown bristles in the marginal area; the central are sparsely covered by short brown bristles too ( Fig. 47d View FIGURE 47 ). Ocular area black covered with short white bristles; four long black bristles on the clypeal condyle anterior to AER; one large black bristle between the AME. First row of eyes is straight and shorter than the first row; AME slightly larger than ALE; PME separated by the length of its radii. Chelicerae strong and pale brown covered frontally with long brown hairs; SF present ( Fig. 45i View FIGURE 45 ). Chillum membranous divided but not conspicuous; boss easy visible. endites and labium pale yellow, whitish on its distal portions. All legs pale brown except in coxae, trochanter and femora which are yellow. A sparse scopulae on legs I and II, absent in III and IV. Spinules present only on tarsi III and IV. All tibiae, tarsi, and metatarsi with trichobothria present. Opisthosoma dorsum light yellow covered with dusk brown mottled patches and brown bristles; poorly visible yellow lanceolate mark on the cardiac area; five pairs of black spots that cover the rear half of the opisthosoma; venter all yellow, cylindrical yellow spinnerets ( Fig. 47d View FIGURE 47 ).
Pedipalp ( Fig. 44a‒c, 44f View FIGURE 44 , 45a‒f, 45h View FIGURE 45 ), cylindrical tibia slightly wider apically. Cymbium fusiform. Trapezoidal subtegulum visible in ventral view, with a broad sinuous sperm duct diagonally crossing the tegulum from base to the apex ( Figs 45e‒f View FIGURE 45 ). Median apophysis with posterior arm evidently pyramidal ( Figs 44f View FIGURE 44 , 45h View FIGURE 45 ) and a sclerotized mound basal in position. The basal portion of the terminal apophysis, sclerotized, sharpened, and curved, its distal part membranous and lamellar shaped. Embolus fusiform, sclerotized and twisted once in its mesial part ( Figs 44b View FIGURE 44 , 45b View FIGURE 45 ).
Leg formula IV>I>III>II. Spination pattern: femur I p 0-0-1 d 1-1-1 r 0-1d-1d, II p 0-1-1 d 1 - 1-1-1 r 0-1-1-0-0-1, III p 0-1-1 d 1-1-1 r 0-1-1, IV p 1d-1d d 1-1-1 r 0-0-1d; patella I d 1bristle-1 bristle II p 1 d 1bristle-1 bristle III p 1 r 1 d 1bristle bas-1bristle ap, IV p 1 r 1 d 1bristle bas-1bristle ap; tibia I p 1-v1 d 1 bristle- 1 bristle r 1-1 v 2-2-2ap, II p 1-1v r 1-1 v 2-2-2ap III, p 1d-1 d 1-1 r 1-1 v 2-1-2ap, IV p 1-v1 d 1-1 r 1-1 v 2-2-2ap; metatarsus I p 1-1-1ap r 0-0-1ap v 2-2-0, II p 1-2-2ap r 0-1-1ap v 2-1-1ap, III p 1-1-2ap d 1-1-2ap v 2-2-1ap, IV p d1-2-2ap v 2-1r-1 r 1d-1v-1d-1v-2ap.
Measurements: TL 6.41, CL 3.33, CCW 1.33, CTW 2.42, CCH 1.00, CTH 1.20. Eyes: AME 0.12, ALE 0.12, PME 0.30, PLE 0.22, interdistances:AME-AME 0.10; AME-ALE 0.04; PME-PME 0.16; PME-PLE 0.26; PLE-PLE 0.54. POQ length 0.50, POQ posterior width 0.68, POQ anterior width 0.44. Chelicerae: length 1.22. Opisthosoma: length 3.08, width 2.25. Legs: femur + patella+tibia + metatarsus + tarsus = total length: pedipalp 1.28 + 0.68 + - + 0.68 + 1.08 = 3.72, I 2.34 + 1.10 + 2.04 + 1.92+1.20 = 8.60, II 2.10 + 1.04 + 1.66 + 2.18+1.12 = 8.10, III 2.16 + 1.00 +1.76 + 2.12+1.18 = 8.22, IV 2. 84 + 1.22 + 2.56 + 3.38+1.50 = 11.50.
Female. Paratype (MUSM-ENT 500107). General pattern ( Figs 47c, f, i View FIGURE 47 , 49b View FIGURE 49 ) as in male, except by the coloration of the opisthosoma which is less visible. Anterior eye row straight, chillum divided ( Fig. 47h View FIGURE 47 ), dentition as in male.
Genitalia ( Fig. 46a‒d View FIGURE 46 , 47b, e View FIGURE 47 , 48a‒c View FIGURE 48 ), longitudinal and transversal septum not distinguishable from each other, the plate is covered by a long white seta. In retrolateral view the anterior part of the transversal septum is depressed ventrally ( Fig. 46d View FIGURE 46 ). In ventral view, the atrium is divided by a thin and perceptible median septum keel ( Fig. 46a View FIGURE 46 ). Copulatory opening laterally located ( Figs 48a, b View FIGURE 48 ) roughed surface on transversal septum ( Fig. 48c View FIGURE 48 ). Fertilization ducts thick and curved ( Fig. 46b View FIGURE 46 ). Head of spermathecae triangular, base of spermatheca expanded, stalk of spermathecae sinuous ( Figs 46b, d View FIGURE 46 ). A short vulval chamber is visible in lateral view ( Fig. 46d View FIGURE 46 ).
Leg formula IV>I>II>III. Spination pattern: femur I p 0-0-1 d 1-1-1, II p 0-0-1 d 1 - 1-1 r 0-1-0, III p 0-1d-1d d 1- 1-1 r 0-1d-1d, IV p 0-0-1d d 1-1-1 r 0-1d-1d; patella I d 1 bristle - 1bristle ap, II d 1 bristle - 1 bristle ap, III p 1 d 1bristle bas-1ap r 1, IV p 1 d 1 bristle bas-1ap r 1; tibia I v 2-2-2ap, II p d1-1 d 1 bristle-1 bristle v 1-2-2ap, III p d1-1 d 1-1 r 1d- 1d v 1-2-2ap, IV p 1d-1 d 1-1 r 1-1v v 2-2-2ap; metatarsus I p 0-1-2 r 0-0-2ap v 2-2-1ap, II p 0-1d-2 r 0-0-2 v 2-2-1ap, III p 1-1-2 r 1d-1d-2 v 2-2-1ap, IV p d1-0-1d-2ap r 1-1v-2 v 2-2-1ap.
Measurements: TL 7.92, CL 3.92, CCW 1.67, CTW 2.92, CCH 1.18, CTH 1.20. Eyes: AME 0.12, ALE 0.10, PME 0.34, PLE 0.24, interdistances:AME-AME 0.10; AME-ALE 0.08; PME-PME 0.26; PME-PLE 0.34; PLE-PLE 0.68. POQ length 0.56, POQ posterior width 0.84, POQ anterior width 0.58. Chelicerae: length 1.60. Opisthosoma: length 1.48, width 1.08. Legs: (femur + patella + tibia + metatarsus + tarsus = total length): pedipalp 1.19 + 0.63 + 0.75 - + 0.69 = 3.26, I 2.44 + 1.25 + 2.00 + 1.86 + 1.13 = 8.68, II 2.22 + 1.25 + 1.81 + 1.81 + 1.03= 8.12, III 2.03 + 1.06 + 1.63 + 2.00 + 0.97 = 7.69, IV 2.91 + 1.25 + 2.41 + 3.06 + 1.28 = 10.91.
Variation. Females N=13 (males N=3) (range, mean±sd): TL 6.92-8.75 7.88±0.50; CL 3.5-4.75, 3.90±0.36; CW 2.67-3.67, 2.96±0.29; (TL 6.25-7.58 6.83±0.68; CL 3.33-3.92 3.61±0.29; CW 2.58-2.92, 2.75±0.17).
Natural history. Arctosa villa has been collected in the type-locality on marshes, under debris of cattail ( Typha domingensis ). Cattails are constantly falling and decomposing becoming debris which facilitates building of spider retreats. All the records for this species are associated with a certain preference whose flooded vegetation environments facilitates its permanence ( Paredes-Munguia 2012: 42, fig. 3A–B). Adults were collected from August to December. Females were more numerous than males and observed with egg sacs during August to September ( Fig. 49 View FIGURE 49 ).
Distribution: Peruvian coastal region, between Lima and Lambayeque ( Fig. 64 View FIGURE 64 ).
Misplaced species
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