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

publication ID

http://doi.org/ 10.11646/zootaxa.4400.1.1

publication LSID

lsid:zoobank.org:pub:59CC08B8-5B13-42EC-943E-C930D7D0DD7F

persistent identifier

http://treatment.plazi.org/id/039B87D1-FFA2-B153-169B-FAF2C4D5FA95

treatment provided by

Plazi

scientific name

Ariadna isthmica Beatty, 1970
status

 

Ariadna isthmica Beatty, 1970  

Figures 43‒44 View FIGURE 43 View FIGURE44 , 68 View FIGURE68

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 View Materials , examined. Paratypes: ♀, same holotype's locality and collector, 28‒31.VII.1939 ( MCZ 27669 View Materials ); 1♀ 4imm., 16.VI ‒15.VII.1934 ( MCZ 27675 View Materials ); 2imm., 7‒9.VII.1936 ( MCZ 27681 View Materials ); 2♀, 23‒30.VI.1939 ( MCZ 27682 View Materials ); 1♂ 1imm., 8‒9.VIII.1939 ( MCZ 27683 View Materials ); 1♀, 1936 ( MCZ 27684 View Materials View Materials ); 1♂, 19.IV.1939, V.H. Dropkin leg. ( AMNH); 5imm. from Canal Zone Biological Area, Canal Zone GoogleMaps   , Panama, VI.1950, A.M. Chickering leg. ( MCZ 27667 View Materials ); 1♀ from Canal Zone Forest PreserVe, Canal Zone   , Panama, 25.VII.1954, A.M. Chickering leg. ( MCZ 27673 View Materials ); 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) GoogleMaps   ; Cuatro Esquinas [10°27'27.0"N; 83°40'06.2"W], 200m, 1♂, IV ‒IX.1990, J. Solano leg. ( INBIO 4407604) GoogleMaps   ; 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) GoogleMaps   ; 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) GoogleMaps   ; 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) GoogleMaps   ; 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 View Materials ) GoogleMaps   ; Volcan Mombacho, El Progreso #1, non-organic coffee plantation, elev. 700‒800m, 1♀, 2.VI.1998, J.M. Maes leg. ( MCZ 32454 View Materials )   ; 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) GoogleMaps   ; Panama [08°59'N; 79°31'W], 2♀, 24‒25.XII.1943, D. L.F. leg. ( CAS 9039563 View Materials ) GoogleMaps   ; 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) GoogleMaps   ; 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 View Materials ) GoogleMaps   ; Senador José Porfírio [02°35'27"S; 51°57'14"W], 1♂, 2.III.2001 ( MPEG 11278 View Materials ) GoogleMaps   .

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 View FIGURE 37 , 44A ‒B View FIGURE44 , 58G ‒H View FIGURE 58 , 61A ‒B View FIGURE 61 ), metatarsi IV ( Figs 36F View FIGURE 36 , 43F View FIGURE 43 , 58F View FIGURE 58 , 60F View FIGURE 60 ), 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 View FIGURE 43 ); females differ from these species by the presence of a ventral lobe less sinuous ( Fig. 44C ‒D View FIGURE44 ).

Description. Male (Paratype—Barro Colorado Island—AMNH). Carapace and chelicerae brownish orange ( Fig. 43A View FIGURE 43 ). Endites orange; labium dark orange. Sternum orange, with darker margins, and three pairs of fainted dark marginal areas ( Fig. 43B View FIGURE 43 ). Palps orange ( Fig. 44A ‒B View FIGURE44 ). 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 View FIGURE 43 ). Abdomen grey, lighter ventrally ( Fig. 43A ‒B View FIGURE 43 ). 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 View FIGURE44 ). Legs: slender and sparsely coated with setae ( Fig. 43C ‒F View FIGURE 43 ); metatarsi IV sinuous, in lateral view ( Fig. 43F View FIGURE 43 ); tarsal brush of putative chemosensory setae present in legs II ‒IV, extending to the median region of the metatarsi IV ( Fig. 43F View FIGURE 43 ). 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 View FIGURE 43 ); 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 View FIGURE 43 ). 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 View FIGURE 43 ). 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 View FIGURE 43 ); 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 View FIGURE44 ).

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 View FIGURE68 ).

MCZ

Museum of Comparative Zoology

AMNH

American Museum of Natural History

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Segestriidae

Genus

Ariadna

Loc

Ariadna isthmica Beatty, 1970

Giroti, André Marsola & Brescovit, Antonio Domingos 2018
2018
Loc

Ariadna isthmica

Beatty 1970: 470
1970