On Chilean Loxosceles (Araneae: Sicariidae): first description of the males of L. surca and L. coquimbo, new records of L. laeta and three remarkable new species from coastal deserts
Brescovit, Antonio D.
Taucare-Ríos, Andrés
Magalhaes, Ivan L. F.
Santos, Adalberto J.
European Journal of Taxonomy
2017
2017-12-27
388
1
20
6QNHL
Brescovit & Taucare-Ríos & Magalhaes & Santos, 2017
Brescovit & Taucare-Ríos & Magalhaes & Santos
2017
[626,864,401,428]
Arachnida
Sicariidae
Loxosceles
Animalia
Araneae
9
10
Arthropoda
species
diaguita
sp. nov.
Figs 3–6, 8D, 10
Diagnosis Males are easily distinguished from other Neotropical Loxoscelesby the shape of the palpal bulb, with a large embolus sided by a keel with several longitudinal grooves ( Figs 3C–D, 6A–C). Females are distinguished by the robust, S-shaped stalks of the outer spermathecae and by the reduced inner spermathecae with long, thin stalks ( Fig. 8D).
Etymology The Diaguitas are a Native American tribe whose original territory covered northwestern Argentinaand northern Chile, including portions of the Antofagasta Region, the typelocality of the species. The name is to be treated as a noun in apposition.
Type material Holotype CHILE: ♂, II Región de Antofagasta, Antofagasta, Taltal, 8.1 kmNNW of Paposo, 24.93947 S, 70.49265 W, 114 ma.s.l., ( MJR-loc-45), desert in bloom, matorrales, manual collecting, 27–29 Oct. 2011, M.J. Ramírez, A. Ojangurenand J. Pizarroleg. ( MNHNCL 7946). Paratypes CHILE: 2 ♀♀, same data as for holotype(MACN-Ar 30185, MNHNCL 7947); 1 ♂, 1 ♀, Taltal, 6 kmE of Paposo, 25.25 S, 70.25 W, 480 ma.s.l., 12 Oct. 1992, N. Platnick, R. Catleyand P. Goloboffleg. ( AMNH); 2 ♀♀, Taltal, 4 kmE of Paposo, 25.3 S, 70.2 W, 20–50 ma.s.l., 11 Oct. 1992, N. Platnick, R. Catley and P. Goloboffleg. ( AMNH); 1 ♀, Paposo, campamento base, 25.00767 S, 70.44678 W, 601 ma.s.l., 26–29 Oct. 2015, R. Botero-Trujillo, J.R. Pizarro-Araya, J.E. Barriga-Tuñónand F.A. Kongleg. (MACN-Ar 37212).
Note Males and females Males and females have been matched because they have been collected in the same locality in two different expeditions.
Description Male(holotype, MNHNCL 7946) Carapace, labium, sternum and legs light brown; carapace lacking the dark-coloured violin-shaped median band typical of Loxosceles( Fig. 3A–B). Endites light brown, distally reddish brown. Palp light brown, with distal articles reddish brown. Opisthosoma light gray, with whitish cardiac area. Total length 7.31. Caparace 3.33 long, 3.06 wide. Clypeus 0.42 high. Eye diameters: ALE 0.17, PME 0.17, PLE 0.18. Sternum 1.76 long, 1.5 wide. Leg I: femur 6.38, patella 1.24, tibia 6.52, metatarsus 6.52, tarsus 1.47, total 22.13. II: 7.32, 1.3, 8.65, 7.98, 1.53, 26.78. III: 5.85, 1.22, 5.85, 5.85, 1.3, 20.07. IV: 6.38, 1.25, 6.38, 7.05, 1.5, 22.56. Leg formula 2413. Palpal femur 1.83 long, 0.28 wide. Palpal tibia 0.97 long, 0.4 wide. Palp with a short cymbium, a round and short tegular base, and a large and curved embolus with a sculptured keel running from its base to the tip ( Figs 4, 6). Female (paratype, MACN-Ar 30185) Colour as in male, carapace hirsute ( Fig. 3C). Total length 9.71. Caparace 4.26 long, 3.72 wide. Clypeus 0.57 high. Eye diameters: ALE 0.18, PME 0.18, PLE 0.2. Sternum 2.36 long, 1.93 wide. Leg I: femur 6.12, patella 1.43, tibia 6.92, metatarsus 5.99, tarsus 1.4, total 21.86. II: 6.92, 1.52, 7.71, 6.78, 1.4, 24.33. III: 5.85, 1.44, 5.45, 5.72, 1.34, 19.8. IV: 6.52, 1.47, 6.52, 5.05, 1.47, 21.03. Leg formula 2143. Palp tarsus 1.54 long, narrow ( Fig. 3D). Spermathecae with a wide, sclerotized base. Inner spermathecae with long and thin stalks, which are laterally directed so that the outer spermathecae receptacles are placed medially relative to the inner spermathecae receptacles. Outer spermathecae larger than the inner spermathecae, with a robust, S-shaped stalk ( Figs 5, 8D). Fig. 5. Loxosceles diaguita sp. nov., ♀, paratype (MACN-Ar 30185). A–B. Spermathecae. A. Dorsal. B. Ventral. Variation Male (n = 2): Total length 7.3–7.6, carapace 3.3–3.8 long, femur I 6.2–6.38 long. Palpal tibia 0.9–1.1 long, 0.4–0.5 wide. Female (n = 4): total length 9.7–10.8, carapace 4.0–4.4 long, femur I 5.8–6.4 long. Palpal tarsus 1.2–1.54 long.
Distribution Known from three nearby localities near Paposo, Antofagasta, and northern Chile( Fig. 10).
1801059170
desert in bloom, matorrales
2011-10-27
2011-10-29
2011-10-27
manual collecting
MNHNCL
Ramírez & Ojanguren & J. Pizarro
Chile
114
-24.93947
Taltal, 8.1 km NNW of Paposo
1
-70.49265
10
11
MJR-loc-45, 7946
1
Región de Antofagasta
holotype
1801059168
1992-10-11
2015-10-29
1992-10-11
AMNH
P. Goloboff & Paposo & Botero-Trujillo & Pizarro-Araya & Barriga-Tunon & F. A. Kong
Chile
Catley
480
-25.00767
Taltal
1
-70.44678
Platnick
10
11
7
6
1
holotype
1801059175
1992-10-11
2015-10-29
1992-10-11
AMNH
P. Goloboff & Paposo & Botero-Trujillo & Pizarro-Araya & Barriga-Tunon & F. A. Kong
Chile
Catley
480
-25.00767
Taltal
1
-70.44678
Platnick
10
11
7
6
1
holotype
1801059156
1992-10-11
2015-10-29
1992-10-11
AMNH
P. Goloboff & Paposo & Botero-Trujillo & Pizarro-Araya & Barriga-Tunon & F. A. Kong
Chile
Catley
480
-25.00767
Taltal
1
-70.44678
Platnick
10
11
7
6
1
holotype