Arnoliseus carioca, Baptista & Castanheira & Oliveira & Prado, 2020

Baptista, Renner Luiz Cerqueira, Castanheira, Pedro de Souza, Oliveira, Gabriel Assuncao & Prado, Andre Wanderley do, 2020, Descriptions of three new species of jumping-spiders, genus Arnoliseus (Araneae, Salticidae), from Rio de Janeiro state, Brazil, with comments on their genital morphology and a key to species, Zoosystematics and Evolution 96 (1), pp. 73-90 : 73

Arnoliseus carioca sp. nov.

Type material.

Holotype ♂. BRAZIL: Rio de Janeiro: Rio de Janeiro, Parque Estadual da Pedra Branca, Pau-da-Fome, Trilha da Padaria, 22°56'12.8"S, 043°26'29.1"W, 133 m, 16.iii.2014, looking down, R. Baptista coll. (MNRJ 60024). Paratypes: same locality as holotype, 6 ♂ 4 junviles, 13.vi.2013, sweeping, R. Baptista coll. (UFRJ 1575); 1 ♂ 2 juveniles, 22.ix.2013, sweeping, P. Castanheira coll. (UFRJ 1576); 1 ♀ 1 juvenile, 22.ix.2013, looking down, P. Castanheira coll. (UFRJ 1578); 1 ♀, 17.xii.2013, looking up, R. Baptista coll. (MNRJ 60025); 1 ♂ 1 ♀ 2 juveniles, 17.xii.2013, sweeping, R. Baptista coll. (UFRJ 1579); 2 ♂ 1 ♀, 17.xii.2013, beating, R. Baptista coll. (MNRJ 60026); 1♀, 16.iii.2014, looking up, R. Baptista coll. (UFRJ 1580); 1 ♀, Parque Estadual da Pedra Branca, Pau-da-Fome, Trilha da Figueira, 22°54'39.3"S, 043°30'24.8"W, 162 m, 13.vi.2013, looking down, R. Baptista coll. (UFRJ 1581); 1 ♀, same locality as preceding, 09.xii.2013, looking down, R. Baptista coll. (UFRJ 1582); 1 ♀, same locality as preceding, 12.vi.2013, looking down, R. Baptista coll. (UFRJ 1583).

Additional material examined.

BRAZIL: 1 ♀ 1 juvneile, Rio de Janeiro: Rio de Janeiro, Parque Estadual da Pedra Branca, Pau-da-Fome, Trilha da Figueira , 22°54'39.3"S, 043°30'24.8"W, 162 m, 12.vi.2013, sweeping, R. Baptista coll. (UFRJ 1589) ; 1 ♂, same locality as previous, 10.xii.2013, sweeping, R. Baptista coll. (UFRJ 1590) ; 1 ♀, same locality as preceding, 15.iii.2014, looking down, P. Castanheira coll. (UFRJ 1592) ; 1 ♂, Parque Estadual da Pedra Branca, Pau-da-Fome, Trilha da Padaria , 22°56'12.8"S, 043°26'29.1"W, 133 m, 22.ix.2013, sweeping, P. Castanheira coll. (UFRJ 1577) ; 3 ♂ 1 juvenile, Parque Estadual da Pedra Branca, Camorim, Sede , 22°58'12.0"S, 043°26'16.4"W, 160 m, 02.vi.2013, sweeping, R. Baptista coll. (UFRJ 1593); Parque Estadual da Pedra Branca, Camorim, Açude, 22°58'08.3"S, 043°26'38.5"W, 342 m, 01.vi.2013, looking up, R. Baptista coll. (UFRJ 1594) ; 1 ♀, same locality as preceding, 02.vi.2013, beating, P. Castanheira coll. (UFRJ 1595) ; 1 ♀, same locality as preceding, 01-09.vi.2013, pitfall traps, P. Castanheira & R. Baptista coll. (UFRJ 1596) ; 1 ♀, same locality as preceding, 15.ix.2013, looking down, R. Baptista coll. (UFRJ 1597) ; 1♂ 2j, same locality as preceding, 08.i.2014, sweeping, R. Baptista coll. (UFRJ 1598) ; 1 ♂, same locality and as preceding, 31.iii.2014, sweeping, P. Castanheira coll. (UFRJ 1600) ; 1 ♂, same locality as preceding, 15-24.iii.2014, pitfall traps, P. Castanheira & R. Batista coll. (UFRJ 1601) .

Etymology.

The species epithet " carioca " is a Tupi noun used in apposition to designate inhabitants of or anything related to Rio de Janeiro city.

Diagnosis.

In A. carioca sp. nov., palps resemble those of A. falcatus sp. nov. as both bear wide embolic complexes with truncated semiquadrate embolic retrolateral keels (Figs 1F, 3B, D, 8F). However, they differ as in A. carioca sp. nov. RTAd and RTAv are in about the same level, forming a “U” (Figs 1G, 3E) and the embolic keel is smaller, with its tip retrolaterally projected, being more proximal than the embolus (Figs 1F, 3D). Females have epigyne similar to A. calcarifer , with two large and pronounced semicircular, slit-like openings (Fig. 2E; Braul and Lise 2002: fig. 34) and U-shaped copulatory ducts, with glandular heads that do not touch the mesal branch of CD (Figs 2F, 3F, 11A; Braul and Lise 2002: fig. 33). They differ as the spermathecae are much larger and the copulatory ducts uniformly taper to the glandular head in A. carioca sp. nov., with no enlarged terminal expansions as observed in A. calcarifer (Figs 2F, 3F, 11A; Braul and Lise 2002: fig. 33).

Description.

Male (holotype MNRJ 60024): carapace reddish brown and very elevated from fovea to the anterior rim (Fig. 1A, B). Fovea dusky with smooth strikes after the eyes (Fig. 1A). Labium long and brown (Fig. 1B). Endites short and dark brown, anteriorly lighter (Fig. 1B). Sternum orange-brown with darker contour (Fig. 1B). PLE evenly separate by almost the carapace length; PME reduced; AME centrally placed, almost touching and occupying most of the clypeus height; ALE located on edge of carapace (Fig. 1A, C, D). Legs orange-brown with dusky patches on femur, tibia, metatarsus, and tarsus of leg I (Fig. 1A-D). Chelicerae paturon reddish brown, bearing thick, bulky, curved, C-shaped apophyses (Fig. 3A). Abdomen oval and tapering to slightly more elongated posterior part towards the dark spinnerets (Figs 1A-C). Dorsum pale beige, with one black transversal line after folium, two black patches followed by one small arched black patch on middle third and U-shaped black patch on posterior edge (Fig. 1A). Lateral portion of abdomen yellow with no patches or lines (Fig. 1C). Venter orange on area of book-lungs and light yellow towards posterior edge, longitudinally divided midway by two orange lines (Fig. 1B). Palps with short tubular tibiae with RTAd and RTAv of almost the same size and apart by a small U-shaped notch; RTAv with carved tip on ectal side (Figs 1G, 3C, E). RTA hook small, almost completely hidden by remaining parts of RTA (Fig. 1G). Cymbium elongated and oval, completely covered by setae (Figs 1E-G, 3B, C). Tegulum ovoid and laterally grooved; embolic complex wide midway, ending in a sclerotized large tip, composed of a more elevated prolateral embolus, bearing the pore opening, and wide, subquadrate and slightly truncated retrolateral keel, with small, triangular and pointed laterally projected apex, located in a lower position to the embolus itself (Figs 1F, 3B, D).

Total length 6.39. Carapace 3.08 long, 0.92 wide, 2.05 high. Left chelicera 1.27 long, 0.67 wide. Clypeus 0.63 high. Endites 0.74 long, 0.47 wide. Labium 0.42 long, 0.38 wide. Sternum 1.30 long, 0.92 wide. Abdomen 3.17 long, 1.57 wide, 1.08 high.

Diameter of eyes and interdistances: AME 0.72; ALE 0.40; PME 0.11; PLE 0.37. ALE-PME 0.36; PME-PLE 0.37. Ocular area (dorsal view): 1.43 long, 1.48 anterior width, 1.45 posterior width.

Leg articles length: Leg I: Fe 2.38; Pa 1.41; Ti 1.82; Mt 1.22; Ta 0.73; Total 7.56. Leg II: Fe 1.70; Pa 0.98; Ti 1.17; Mt 1.09; Ta 0.61; Total 5.55. Leg III: Fe 2.42; Pa 1.00; Ti 1.40; Mt 0.93; Ta 0.54; Total 6.29. Leg IV: Fe 2.12; Pa 0.75; Ti 1.36; Mt 1.15; Ta 0.61; Total 5.99.

Leg formula I-III-IV-II.

Female (paratype UFRJ 1583): carapace orange brown, with lighter contour after fovea and light brown on ocular area (Fig. 2A). Fovea orange (Fig. 2A). Labium elongated and orange-brown (Fig. 2B). Endites short and orange brown, anteriorly lighter (Fig. 2B). Sternum yellowish brown with orange contour (Fig. 2B). Eyes as in male, outlined by yellow setae (Fig. 2A-D). Legs yellowish brown (Fig. 2A-D). Abdomen beige, with same shape and dorsal patches pattern as male (Fig. 2A-C). Epigyne with epigynal plate orange, poorly defined, sclerotized at the posterior half, with two semicircular slit-like copulatory openings just anteriorly to posterior rim, which has a shallow posterior median notch (Fig. 2E). Internal genitalia composed of two slender fertilization ducts anteriorly connected to the ventral portion of the massive rounded spermathecae and two thick U-shaped copulatory ducts formed of thicker mesal branches and regularly curved ectal branches ending in rounded glandular heads, placed far from the spermathecae (Figs 2F, 3F, 11A).

Total length 6.09. Carapace 2.63 long, 1.87 wide, 1.30 high. Left chelicera 0.78 long, 0.52 wide. Clypeus 0.32 high. Endites 0.70 long, 0.54 wide. Labium 0.49 long, 0.43 wide. Sternum 1.10 long, 0.85 wide. Abdomen 3.32 long, 1.09 wide, 1.16 high.

Diameter of eyes and interdistances: AME 0.74; ALE 0.42; PME 0.11; PLE 0.36. ALE-PME 0.35; PME-PLE 0.25. Ocular area (dorsal view): 1.29 long, 1.41 anterior width, 1.43 posterior width.

Leg articles length: Leg I: Fe 1.63; Pa 0.71; Ti 1.11; Mt 0.85; Ta 0.52; Total 4.82. Leg II: Fe 1.15; Pa 0.81; Ti 0.78; Mt 0.41; Ta 0.38; Total 3.53. Leg III: Fe 1.01; Pa 0.81; Ti 1.12; Mt 0.63; Ta 0.47; Total 4.04. Leg IV: Fe 0.89; Pa 0.64; Ti 0.97; Mt 1.02; Ta 0.50; Total 4.02.

Leg formula I-III-IV-II.

Variation.

Males (n = 6): total length, 5.58-7.80; females (n = 9): total length, 5.87-7.21.

Distribution.

Only known from type locality (Fig. 12).

Preservation status.

Well preserved in 75% ethanol. Male holotype with left chelicera dissected. Female paratype UFRJ 1581 with genitalia dissected.