The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae)
Giroti, André Marsola
Brescovit, Antonio Domingos
Zootaxa
2018
2018-03-26
4400
1
1
114
GLLG
Giroti & Brescovit, 2018
Giroti & Brescovit
2018
[151,347,1894,1920]
Arachnida
Segestriidae
Ariadna
GBIF
Animalia
Araneae
94
95
Arthropoda
species
gaucha
sp. nov.
Figures 60‒61, 70
Type-material. ♂ holotypefrom Porto Alegre[ 30°01'58"S; 51°13'48"W], Rio Grande do Sul, Brazil, 10.XII.1993, M.A.L. Marquesleg., deposited in MCN24622.); Paratypes: 1♂ 10♀8 imm. from Cantagalo, Viamão [ 30°04'51"S; 51°01'22"W], Rio Grande do Sul, Brazil, 12.VII.1963, J. Pacinileg. ( MCN 1043); 1♂from Porto Alegre, Rio Grande do Sul, Brazil, 25.X.1994, M.A.L. Marquesleg. ( MCN25873); 1♂from Parque Estadual de Itapuã, Viamão[ 30°04'51"S; 51°01'22"W], Rio Grande do Sul, Brazil, 13.I.2004, A.C.K. Ferreira et al.leg. ( MCTP 16822); 1♂from Cidreira, Rio Grande do Sul, Brazil[ 30°10'26"S; 50°12'27"W], 10.VIII.2003, J.A.M. Pintoleg. ( MCTP 22335). Additional material examined. BRASIL: Rio Grande do SulState: Santo Ângelo[ 28°17'56"S; 54°15'46"W], 1♀6imm., 19.VII.1963, L.O. de Moraesleg. ( MCN 1041); Capão da Canoa[ 29°45'39"S; 50°01'48"W], 14♀6imm., 6.I.1963, C.A. Hartliebleg. ( MCN 1052); Porto Alegre[30°01"58"S; 51°13'48"W], 1♂, 17.XI.1991, M.A.L. Marquesleg. ( MCN21612); 1♂, 25.XI.2000( MCN33489); 1♂, 2.I.2003( MCN35030); 1♂, 2009 ( MCN46763); 1♂, 5.X.1998, Z. Rosaleg. ( MCN29474); 1♂, 19.V.1973, S.L. Cardosoleg. ( MCN52084); Reserva Biológica do Lami José Lutzenberger( 30°14'S; 51°06'W), 1♂, 20.X‒8.XI.2005, R. Moraesleg. ( MCN40282); Morro São José [ 30°01'58"S; 51°13'48"W], 1♂, 6.I.1963, C.A. Hartliebleg. ( MCN 1176); Viamão, Parque Estadual de Itapuã[ 30°04'51"S; 51°01'22"W], 1♀2imm., 2.XI.1962, C.A. Hartliebleg. ( MCN 1062); 1♂, 21.X.2003, A.C.K. Ferreiraleg. ( MCTP 16819); 1♂, 10.II.2004( MCTP 16820); 1♂, 8.X.2003( MCTP 16821); 1♂, 30.XII.2003( MCTP 16823); 1♂, 12.VIII.2003( MCTP 16824); 1♀, 28.VIII.2003( MCTP 16825); 1♂, 17.XII.2003( MCTP 16826); 1♂, 26.I.2004( MCTP 16827); Foz Arroio Itapuã, 1♂, 11.IX.2001, L.E.C. Schmidt & R. Ottleg. ( MCN34282); Cidreira [ 30°10'26"S; 50°12'27"W], 1♂, 6.IX.2003, J.A.M. Pintoleg. ( MCTP 22336); 1♂, 1.XI.2003( MCTP 22337); 3♂, 29.XI.2003( MCTP 22338‒22340); 3♂, 26.XII.2003( MCTP 22341; 22342); Tapes [ 30°40'22"S; 51°23'45"W], 1♀1imm., 18.II.1977, E.H. Buckupleg. ( MCN 5292).
Diagnosis. Ariadna gaucha n. sp.is similar to A. boliviana, A. isthmicaand A. ipojuca n. sp.due to the morphology of male palp ( Figs 37A‒B, 44A‒B, 58G‒H, 61A‒B) and metatarsi IV ( Figs 36F, 43F, 58F, 60F), differing from them, except A. ipojuca n. sp., by the presence of a less marked transition between mid-portion and embolus; it differs from A. ipojuca n. sp.by the abruptly curved embolus ( Fig. 61A‒B); females differ from those by the presence of a strongly sinuous ventral lobe, with an expanded tip ( Fig. 61C‒D).
Etymology.The specific name is an adjective in apposition, referring to the “gaucho”, people that live in the State of Rio Grande do Sul, Brazil.
Description. Male ( Holotype).Carapace and chelicerae orange ( Fig. 60A). Endites orange, labium dark orange. Sternum orange, with darker margins ( Fig. 60B). Palps orange ( Fig. 61A‒B). Legs orange, with pairs I‒II darker and with dark pigment forming diffuse rings in the distal region of the patella, tibia, metatarsi and tarsi ( Fig. 60C‒F). Abdomen grey, lighter ventrally ( Fig. 60A‒B). Total length 5.76; carapace 2.6 long, 1.76 wide. Palps: tibia slightly incrassated, with the dorso-ventral diameter almost the same as the bulb; bulb rounded, mid-portion shorter than the embolus and abruptly curved forwards; embolus with a tubular and tapered tip, directed upward; ( Fig. 61A‒B). Legs: robust and coated with setae ( Fig. 60C‒F); metatarsi IV slightly sinuous, in lateral view ( Fig. 60F); tarsal brush of putative chemosensory setae present in tarsi II‒IV, extending to the median region of metatarsi IV ( Fig. 60F). Leg formula: I-II-IV-III. Leg measurements: I, femur 2.44, patella 0.92, tibia 2.04, metatarsus 2.28, tarsus 0.56, total 8.24; II, 2.36, 0.92, 2.04, 2.24, 0.6, 8.16; III, 1.72, 0.8, 1.24, 1.36, 0.52, 5.64; IV, 2.0, 0.88, 1.48, 1.36, 0.52, 6.24. Macrosetae: I, femur D0-1-0-1-0-1-1/0-0-2-0, P0-0-0-0-0-0-0-1-1-0; tibia D0-0-0-1-0-1-0, P1-1- 0-1-0-1-0, vp1-0-0-0-0-0-1, vr2-0-1-0-1-0-1, R1-1-0-1-0-1-0-1; metatarsus p0-1-0-0-0-0-0, vp0-0-1-0-1-0-0, vr0- 0-0-0-0-0-1; II, femur D0-1-0-1-0-1-0-2-0, P0-0-0-0-0-1-0-1-0; tibia D0-0-0-0-0-1-0, P1-1-0-1-0-1-0, vp0-0-0-0-1- 0-1, vr2-0-1-0-1-0-1, R1-1-0-1-0-1-0-1; metatarsus p0-1-0-0-0-0-0, vp1-0-0-1-0-0-1, vr1-0-0-1-0-0-1, r0-1-0-0-0- 0-0; IV, femur D1-1-1-1-0-1-0, R0-0-0-0-0-1-0; metatarsus vp0-0-0-0-0-0-1, vr metatarsal comb with 4 macrosetae. Female (Paratype—MCN 1043).Coloration of carapace, chelicerae, endites, labium, sternum and abdomen as in male ( Fig. 60G‒H). Palps orange, darkening gradually in distal direction. Legs orange, with pairs I‒II darker and with dark pigment forming diffuse rings in the distal region of the femur, patella, tibia, metatarsus and tarsus ( Fig. 60I‒J). Total length 8.0; carapace 3.2 long, 1.96 wide. Legs: robust and densely coated with setae; legs I‒II with ventral setae that gradually reduce its size in distal direction, ventro-prolateral and ventro-retrolateral tibial macrosetae of similar size, and metatarsal macrosetae of different sizes ( Fig. 60I‒J). Leg formula: I-II-IV-III. Leg measurements: I, femur 2.24, patella 1.12, tibia 1.76, metatarsus 1.72, tarsus 0.6, total 7.44; II, 2.0, 1.12, 1.8, 1.72, 0.6, 7.24; III, 1.64, 0.88, 1.12, 1.16, 0.56, 5.36; IV, 2.04, 1.12, 1.64, 1.24, 0.48, 6.52. Macrosetae: I, femur D0-0-0- 0-1-0-2-0, P0-0-0-0-2-0-1-0; tibia P0-1-0-1-0-0-1-0, vp1-1/0-1-0-1-0-1, vr1-0-1-0-1-0-1, R0-1-0-1-0-0-1-0; metatarsus vp0-1-1-1-1-1-1-1-1, vr0-1-1-1-1-1-1-1-1 ( Fig. 60I‒J); II, femur D0-1-0-1/0-0-1-0-2-0, P0-0-0-0-0-0-0/ 1-1-0; tibia P0-1-0-1-0-1-0, vp1(slender)-0-1-0-1-0-1, vr1-0/1-1-0-1-0-1, R0-1-0-1-0-0-0; metatarsus vp0-1-1-1-1- 1-1-1-1-1, vr0-1-1-1-1-1-1-0-1-1; IV, metatarsus vp0-0-0-0-0-0-1, vr metatarsal comb with 4 macrosetae. Internal genitalia: anterior receptaculum with a glandular ducts plate located in the median region, with the proximal region expanded ( Fig. 61C‒D). Variation.Male (n=10): Total length 4.6‒6.5; carapace 2.25‒3.05 long, 1.6‒2.1 wide; femur I 2.1‒2.65. Female (n=10): Total length 4.75‒7.75; carapace 2.35‒3.3 long, 1.55‒2.1 wide; femur I 1.75‒2.2. Distribution. Rio Grande do Sul( Brazil) ( Fig. 70).
1836417287
1993-12-10
MCN
M. A. L. Marques
Brazil
95
96
-30.032778
Porto Alegre
20
-51.23
94
95
1
Rio Grande do Sul
holotype
1836417070
1963-07-12
MCN
J. Pacini
Brazil
-30.080833
Rio Grande do Sul
20
-51.022778
95
96
MCN 1043
11
10
1
Rio Grande do Sul
paratype
1836417121
1994-10-25
MCN
M. A. L. Marques
Brazil
Porto Alegre
95
96
1
1
Rio Grande do Sul
paratype
1836416900
2004-01-13
MCTP
A. C. K. Ferreira
Brazil
-30.080833
Parque Estadual de Itapua
20
-51.022778
Viamao
95
96
MCTP 16822
1
1
Rio Grande do Sul
paratype
1836417051
2003-08-10
MCTP
J. A. M. Pinto
Brazil
-30.17389
Cidreira
20
-50.2075
95
96
MCTP 22335
1
1
Rio Grande do Sul
paratype
1836417156
1962-11-02
2005-11-08
1962-11-02
MCN
L. O. de Moraes & da Canoa & C. A. Hartlieb & M. A. L. Marques & Z. Rosa & S. L. Cardoso & R. Moraes & A. C. K. Ferreira & R. Ott & J. A. M. Pinto & E. H. Buckup
Brazil
Santo Angelo
-30.672777
Porto Alegre
20
-51.395836
Capao da Canoa
95
96
MCN 1041, MCN 1052, MCN 1176, MCN 1062, MCTP 16819, MCTP 16820, MCTP 16821, MCTP 16823, MCTP 16, MCTP 16825, MCTP 16826, MCTP 16827, MCTP 22336, MCTP 22337, MCTP 22338-22340, MCTP 22341, MCN 5292
42
18
24
Rio Grande do Sul