Ariadna isthmica Beatty, 1970

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114 : 71-74

Ariadna isthmica Beatty, 1970

Figures 43‒44 , 68

Ariadna isthmica Beatty, 1970: 470 , figs 23‒25, 30 (♂ holotype from Barro Colorado Island [09°09'N; 79°51'W], Canal Zone, Panama, 1‒2.VII.1939, A.M. Chickering leg., deposited in MCZ 21712, examined. Paratypes: ♀, same holotype's locality and collector, 28‒31.VII.1939 ( MCZ 27669); 1♀ 4imm., 16.VI‒15.VII.1934 ( MCZ 27675); 2imm., 7‒9.VII.1936 ( MCZ 27681); 2♀, 23‒30.VI.1939 ( MCZ 27682); 1♂ 1imm., 8‒9.VIII.1939 ( MCZ 27683); 1♀, 1936 ( MCZ 27684 ); 1♂, 19.IV.1939, V.H. Dropkin leg. ( AMNH); 5imm. from Canal Zone Biological Area, Canal Zone , Panama, VI.1950, A.M. Chickering leg. ( MCZ 27667); 1♀ from Canal Zone Forest PreserVe, Canal Zone , Panama, 25.VII.1954, A.M. Chickering leg. ( MCZ 27673); 2imm. from Huaspuc River [14°37'60"N; 84°25'60"W], Musawas , Nicaragua , 10‒31.X.1955, B. Malkin leg. ( AMNH), all examined).— World Spider Catalog (2018).

Additional material examined. COSTA RICA: Limón Province: Estación Reserva Biológica Hitoy Cerere [9°38'32.3"N; 83°04'14.6"W], La poza de las chichis, 140m, 1♂, 21‒24.VI.1998, E. Rojas leg. ( INBIO 4407610 ) ; Cuatro Esquinas [10°27'27.0"N; 83°40'06.2"W], 200m, 1♂, IV‒IX.1990, J. Solano leg. ( INBIO 4407604 ) ; Guanacaste Province: Bagaces, Parque Nacional Palo Verde [10°22'59.9"N; 85°20'02.5"W], Estación Palo Verde , 0‒100m, 1♂ 1♀, 15.VI.1999, C. Víquez leg. ( INBIO 4407887 ) ; Fita Catalina , 250m, 1♀, 9.III‒6.IV.2000, I. Jiménez leg. ( INBIO 4407618 ) ; 150 N de la Estación , 50m, 1imm., 6‒20.V.1999, I. Jiménez leg. ( INBIO 4407889 ) ; Área de Conservación Guanacaste, Liberia, Parque Nacional Santa Rosa [10°53'01''N; 85°46'30''W], Estación Santa Rosa , 300m, 2♀, 1‒31.I.1991, D. Janzen leg. ( INBIO 4407615 ) ; Área de Conservación Guanacaste, La Cruz, Parque Nacional Guanacaste [10°57'21.9"N; 85°29'42.9"W], Estación Maritza , 600m, 2♂, 1‒31.V.1996, M. Pereira leg. ( INBIO 4407616 ) ; 1imm., 1‒30.IX.1996 (INBIO 4407609); 2imm., 1‒31.I.1997, C. Zuniga leg. (INBIO 4407617); 600‒700m, 1♀, 22.IV.2004, G. Alayón leg. (INBIO 4407614); Sendero a la Toma de Água , 1♀, 22.IV.2004, R. Gutiérrez leg. ( INBIO 4407613 ) ; NICARAGUA: Granada Department: Volcan Mombacho [11°49'3''N; 85°58'03"W], San Joaquin #1, 1♂, 15.VI.1999, J.M. Maes leg. ( MCZ 32451) ; Volcan Mombacho, El Progreso #1, non-organic coffee plantation, elev. 700‒800m, 1♀, 2.VI.1998, J.M. Maes leg. ( MCZ 32454) ; 1♂, 21.VI.1998 (MCZ 32455); PANAMA: Canal Zone: Barro Colorado Island [09°09'N; 79°51'W], Kodak House , 1♀, 10.IV.1976, Silberglied & Aiello leg. ( USNM) ; Panama [08°59'N; 79°31'W], 2♀, 24‒25.XII.1943, D. L.F. leg. ( CAS 9039563 ) ; BRAZIL: Amazonas State: Reserva Florestal Adolpho Ducke , 100m (02°55'12"S; 59°58'48"W), 1♂, 16.IX.1991, H. Höfer & T. Gasnier leg. ( SMNK-ARA 3035 ) ; Pará State: Ilha de Marajó, Salvaterra, Praia de Joanes [00°45'10"S; 48°31'01"W], 1♀, 15.II.2010, R.P. Indicatti, D.F. Candiani & N.F. Lo-Man-Hung leg. ( MPEG 15621 ) ; Senador José Porfírio [02°35'27"S; 51°57'14"W], 1♂, 2.III.2001 ( MPEG 11278 ) .

Diagnosis. Ariadna isthmica is similar to A. boliviana , A. ipojuca n. sp. and A. gaucha n. sp. due to the morphology of male palp ( Figs 37A‒B , 44A‒B , 58G‒H , 61A‒B ), metatarsi IV ( Figs 36F , 43F , 58F , 60F ), and leg macrosetae of females, but differ by the presence of sinuous metatarsi I, with both extremes equal in size and similarly bended; basal region prolaterally bended, and distal region retrolaterally ( Fig. 43C‒E ); females differ from these species by the presence of a ventral lobe less sinuous ( Fig. 44C‒D ).

Description. Male (Paratype—Barro Colorado Island—AMNH). Carapace and chelicerae brownish orange ( Fig. 43A ). Endites orange; labium dark orange. Sternum orange, with darker margins, and three pairs of fainted dark marginal areas ( Fig. 43B ). Palps orange ( Fig. 44A‒B ). Legs brownish orange, pairs I‒II darker, with the femur, patella and tibia marbled with fainted dark pigment, and dark diffuse rings in the distal region of metatarsus ( Fig. 43C‒F ). Abdomen grey, lighter ventrally ( Fig. 43A‒B ). Total length 6.24; carapace 3.12 long, 2.32 wide. Palps: tibia incrassated, with the dorso-ventral diameter shorter than the bulb; bulb rounded, midportion shorter than the embolus and directed backwards; mid-portion/embolus transition conspicuous; embolus long and with a tubular tip ( Fig. 44A‒B ). Legs: slender and sparsely coated with setae ( Fig. 43C‒F ); metatarsi IV sinuous, in lateral view ( Fig. 43F ); tarsal brush of putative chemosensory setae present in legs II‒IV, extending to the median region of the metatarsi IV ( Fig. 43F ). Leg formula: I-II-IV-III. Leg measurements: I, femur 3.0, patella 1.2, tibia 2.52, metatarsus 2.72, tarsus 0.72, total 10.16; II, 2.68, 1.12, 2.52, 2.72, 0.76, 9.8; III, 2.08, 0.96, 1.56, 1.68, 0.64, 6.92; IV, 2.4, 1.08, 1.88, 1.68, 0.64, 7.68. Macrosetae: I, femur D0-0-0-1-0-2-0, P0-0-0-0-1-1-0; tibia D0-0-0-0-1-0-0, P0-1-0-1-0-1-0, vp1-0-0-0-0-0-1, vr2-0-1-0-1-0-1, R1-1-1-1-1-1-1; metatarsus p0-1-0-0-0-0-0, vp0-1-0-0-1-0-1, vr0-0-0-0-1-0-1 ( Fig. 43C‒E ); II, femur D0-0-0/1-0/1-0-2-0, P0-0-0-0-1-1-0; tibia D0-0-0-0-0/1- 0-0, P0-1-0-1-0-1-0, vp0-0-0-0-0-1-1, vr2-0-1-0-1-0/1-1, R1-1-0-1-0-1-0; metatarsus p0-1-0-0-0-0-0, vp1-0-0-1-0- 0-1, vr1-0-0-1-0-0-1, r0-0-0/1-0-1/0-0-0; IV, femur D1/0-1-0-0-0-0-0; metatarsus vr metatarsal comb with 4 macrosetae.

Female (Barro Colorado Island—USNM). Coloration as in male; palps orange, gradually darkening to distal direction ( Fig. 43G‒H ). Total length 10.56; carapace 3.8 long, 2.56 wide. Legs: robust and densely coated with setae; legs I‒II with ventro-prolateral and ventro-retrolateral tibial macrosetae of similar size, and metatarsal macrosetae of different sizes ( Fig. 43I ‒J ). Leg formula: I-II-IV-III. Leg measurements: I, femur 2.8, patella 1.32, tibia 2.2, metatarsus 2.0, tarsus 0.68, total 9.0; II, 2.6, 1.32, 2.2, 2.0, 0.68, 8.8; III, 2.04, 1.12, 1.44, 1.44, 0.64, 6.68; IV, 2.44, 1.32, 1.92, 1.6, 0.6, 7.88. Macrosetae: I, femur D0-0-0-0-0-2-0, P0-0-0-2-1-0-0; tibia P0-0-0-1-0-1-0, vp1- 0-1-0-1-0-1, vr1-0-1-0-1-0-1, R0-1-0-1-0-1-0; metatarsus vp1-1-1-1-1-1-1, vr1-1-1-1-1-1-1 ( Fig. 43I ‒J ); II, femur D0-0-0-0-0-2-0, P0-0-0-0-0-1-0; tibia P0-1-0-1-0-1-0, vp0-0-0-1(slender)-0-1-1, vr1-0-1-0-1-0-1, R0-1-0-1-0-1-0; metatarsus vp1-1-1-1-1-1-1, vr1-1-1-1-1-0/1-1-1-1; IV, metatarsus vp0-0-0-0-0-1, vr metatarsal comb with 4 macrosetae. Internal genitalia: anterior receptaculum with short lobes, and glandular plate in the proximal region, expanded laterally ( Fig. 44C‒D ).

Variation. Male (n=10): Total length 4.52‒7.76; carapace 2.28‒3.68 long, 1.6‒2.72 wide; femur I 2.32‒3.4. Female (n=10): Total length 7.2‒12.48; carapace 3.2‒4.32 long, 2.08‒2.8; femur I 2.32‒2.96.

Distribution. Nicaragua, Panama and north of Brazil ( Fig. 68 ).

Figures

FIGURE 36. Ariadna boliviana Simon, 1907. Male from Morrinhos (IBSP 152775) (A‒F): habitus, dorsal (A) and ventral view (B); right leg I, prolateral (C) and retrolateral view (D); right metatarsi I, ventral view (E); left metatarsi IV, retrolateral view (F). Female from Parauapebas (IBSP 193500) (G‒J): habitus, dorsal (G) and ventral view (H); right leg I, prolateral (I) and retrolateral view (J). Scale bar:1mm.

FIGURE 37. Ariadna boliviana Simon, 1907. Male from Morrinhos (IBSP 152775) (A‒B): left palp, prolateral (A) and retrolateral view (B). Female from Assis (IBSP 98907) (C‒D): internal genitalia, lateral view (C); anterior receptaculum, ventral view (D).Scale bar:1mm.

FIGURE 43. Ariadna isthmica Beatty, 1970. Males (Paratype) (AMNH) (A‒D, F) and (Holotype) (MCZ 21712) (E), both from Barro Colorado Island: habitus. dorsal (A) and ventral view (B); left leg I, prolateral (C) and retrolateral view (D); left metatarsus I, ventral view (E); left metatarsus IV, retrolateral view (F). Female from Barro Colorado Island (USNM) (G‒J): habitus, dorsal (G) and ventral view (H); left leg I, prolateral (I) and retrolateral view (J). Scale bar: 1mm.

FIGURE44.Ariadna isthmicaBeatty, 1970.Male (Paratype)from BarroColorado Island (AMNH) (A‒B):left palp,prolateral (A) and retrolateral view (B). Female (Paratype) from Canal Zone Forest Preserve (MCZ 27673) (C‒D): internal genitalia, lateral view (C); anterior receptaculum, ventral view (D). Scale bar: 1mm.

FIGURE 58. Ariadna ipojuca n. sp.. Male (Holotype) from Ipojuca (IBSP 133641) (A‒H): habitus, dorsal (A) and ventral view (B); left leg I, prolateral (C) and retrolateral view (D); left metatarsus I, ventral view (E); left metatarsus IV, retrolateral view (F); left palp, prolateral (G) and retrolateral view (H). Scale bar: 1mm.

FIGURE 60. Ariadna gaucha n. sp.. Male (Paratype) from Porto Alegre (MCN 25873) (A‒F): habitus, dorsal (A) and ventral view (B); rightleg I, prolateral (C) and retrolateral view (D); right metatarsus I, ventral view (E); leftmetatarsus IV,retrolateral view (F).Female(Paratype) from Cantagalo(MCN 1043) (G‒J):habitus, dorsal (G) and ventral view (H); rightleg I, prolateral (I) and retrolateral view (J). Scale bar:1mm.

FIGURE 61. Ariadna gaucha n. sp.. Male (Paratype) from Porto Alegre (MCN 25873) (A‒B): left palp, prolateral (A) and retrolateral view (B). Female (Paratype) from Cantagalo (MCN 1043) (C‒D): internal genitalia, lateral view (E); anterior receptaculum, ventral view (F). Scale bar:1mm.

FIGURE68. Locality of the specimens of A.caerulea, A.tovarensis, A. arthuri, A.multispinosa, A.isthmica and A. reginae n. sp. examined in the present study.