Idiops minguito Ferretti, 2017

Ferretti, N., Nime, M. & Mattoni, C., 2017, Three new Idiops (Mygalomorphae: Idiopidae) from Argentina and redescription of the male of I. hirsutipedis Mello-Leitão, 1941, Journal of Natural History (J. Nat. Hist.) 51 (17 - 18), pp. 975-994 : 982-986

Idiops minguito Ferretti sp. nov.

( Figures 6–8 , 13 )

Type material

Holotype male. Argentina, Salta, La Quena (23°19′52.84″ S – 63°50′40.75″ W), 4–5 February 1985, C. Szumik and P. Goloboff col. (MACN-Ar36714) . Paratype female: Argentina, Salta, La Quena (23°19′52.84″ S – 63°50′40.75″ W), 14–15 May 1983, P . Goloboff col . (MACN-Ar36715).

Additional material examined

Argentina, Salta, La Quena (23°19′52.84″ S – 63°50′40.75″ W), May 1983, P . Goloboff col ., 1♀ (MACN-Ar36716); Argentina, Salta, La Quena (23°19′52.84″ S – 63°50′40.75″ W), 14–15 May 1983, P . Goloboff col ., 6♀ (MACN-Ar36717); Argentina, Salta, Campamento Vespucio (22°36′0″ S – 63°49′0″ W), 9–13 May 1983, P . Goloboff col ., 4♀ and 1 juvenile (MACN- Ar 36718); Argentina, Salta, La Quena (23°19′52.84″ S – 63°50′40.75″ W), 4–5 February 1985, C . Szumik and P . Goloboff col ., 1♂ (MACN-Ar36719); Argentina, Salta, Hickman (23° 12′0″ S – 63°34′0″ W), 20 March 1988, P . Goloboff, F . Coyle and Bennet col ., 1♀ and 1 juvenile (MACN-Ar); Argentina, Jujuy, Parque Nacional Calilegua (23°38′20″ S – 64°50′17″ W), 1 February 1985, C . Szumik and P . Goloboff col ., 2♀ and 1 juvenile (MACN-Ar36720); Argentina, Jujuy, Señora del Socavón , El Bananal (24°10′59″ S – 65°17′0″ W), May 1983, P . Goloboff col ., 1 juvenile (MACN-Ar36847).

Etymology

The species is a name in apposition of ‘Minguito Tinguitella’, a famous character created by the writer Juan Carlos Chiappe and played by the Argentine actor Juan Carlos Altavista (1929–1989), between the 1960s and the 1980s. ‘Minguito’ represents the traditional Argentine man, more particularly with the customs of Buenos Aires.

Diagnosis

The male of I. minguito sp. nov differs from that of other Argentinean species by retrolateral spines of palpal tibia mainly concentrated on the basal and apical portion of the depression (Figure (6f–g)), basal branch of tibial apophysis with a short and very small spine ( Figure 6 (d–e)). Palpal bulb resembles that of I. clarus in the presence of a dorsal tooth at tip of embolus, but differs by the shorter embolus and apical expansion of the tip of embolus less developed ( Figure 7 (a–c)). Females can be distinguished by the tibia of leg III bearing a dorsal proximal depression ( Figure 8 (d)) and spermathecae with a sclerotised basal area larger than in I. clarus ( Figure 8 (e)).

Description

Male holotype (MACN-Ar36714). Colouration (in alcohol): carapace, chelicerae and legs uniformly light brown ( Figure 6 (a)), abdomen grayish with a dorsal apical dark spot. Total length 8.64; carapace 4.09 long, 3.38 wide. Carapace rounded with granules throughout ( Figure 6 (a)); fovea deep, procurved, 0.52 wide. Ocular group 1.02 long, 0.96 wide. ALE situated far in advance of the rest ( Figure 6 (c)). Posterior row slightly procurved. Distance between AME and ALE 0.26. Eye sizes and interdistances: AME 0.28, PME 0.19, ALE 0.29, PLE 0.28, AME–AME 0.10, PLE–PME 0.06, PME–PME 0.24. Labium 0.48 long, 0.85 wide, without cuspules, labiosternal groove shallow. Maxillae without cuspules. Chelicerae with 5 promarginal teeth and 6 retromarginal teeth, rastellum conspicuous on a distinct process. Sternum elongated; 1.98 long, 2.01 wide with thin setae on margins ( Figure 6 (b)). Leg formula 4-1-2-3, morphometry (femur, patella, tibia, metatarsus, tarsus, total): I: 4, 1.74, 3.21, 2.93, 2.18, 14.06. II: 3.37, 1.68, 2.4, 2.96, 1.77, 12.58. III: 2.31, 1.31, 1.74, 2.94, 2.12, 10.42. IV: 4.01, 1.51, 3.7, 3.95, 2.53, 15.7. Palp: 2.17, 1.03, 2.19, –, 0.93, 6.32. Spines: Palp: femur 1-1-1d, patella 0, tibia 23r, tarsus 0. I: femur 1-1-1d, patella 1v, tibia 1-1-1-1v, 1-1r, metatarsus 1-2-1-2r, 1-1-1-1p, tarsus 1-1r, 1p. II: femur 1-1-1-1d, patella 0, tibia 1-1-2v, metatarsus 1-1-1-1r, 1p, tarsus 1r, 1p. III: femur 1-1-1-1d, patella 1-1-1-1-1-4p, 1r, tibia 2-2v, 1-1-1-1p, 1-1r, metatarsus 1-2r, 1-2p, tarsus 1-1r. IV: femur 0, patella 3-1-2-1-3-1p, 2v, tibia 1-1-2v, metatarsus 1-2r, 1-1-1-2p, 1-1-1-1-1-2v, tarsus 1-1-1p, 1-1r. Scopulae: complete and entire on legs I–IV. Tibia of leg I with double tibial apophysis with apical branch slightly bigger than basal with a long spine, and the basal branch with an apical short and very small spine ( Figure 6 (d–e)). Metatarsus I straight. Palpal tibia swollen at base with retrolateral concavity, crescent-shaped band of about 23 spines along the entire retrolateral side of concavity ( Figure 6 (f–g)). Palpal bulb with embolus broad at base abruptly tapering at distal end with apical expansion ( Figure 7 (a–c)).

Female paratype (MACN-Ar36715). Colouration (in alcohol): carapace, chelicerae and legs uniformly light brown ( Figure 8 (a)), abdomen grayish with a dorsal apical dark spot. Total length 16.32; carapace 4.61 long, 5.02 wide. Carapace oval ( Figure 8 (a)); fovea deep, strongly procurved, 1.15 wide. Ocular group 1.45 long, 1.23 wide. ALE situated far in advance of the rest ( Figure 8 (c)). Posterior row slightly procurved. Distance between AME and ALE 0.29. Eye sizes and interdistances: AME 0.18, PME 0.22, ALE 0.36, PLE 0.25, AME–AME 0.20, PLE–PME 0.14, PME–PME 0.26. Labium 0.73 long, 0.97 wide, with 3 cuspules, labiosternal groove shallow. Maxillae with 47/43 (right/left) cuspules. Chelicerae with 6 promarginal teeth and 4 retromarginal teeth, rastellum conspicuous on a distinct process. Sternum elongated; 3.21 long, 3.09 wide with thin setae on entire surface ( Figure 8 (b)). Leg formula 4-1-3-2, morphometry (femur, patella, tibia, metatarsus, tarsus, total): I: 3.72, 2.48, 2.4, 1.94, 0.9, 11.44. II: 3.24, 1.95, 2.05, 1.44, 1.01, 9.69. III: 2.47, 2.22, 1.35, 1.92, 1.89, 9.85. IV: 3.72, 2.37, 2.98, 2.82, 1.94, 13.83. Palp: 2.94, 1.99, 2.16, –, 2.4, 9.49. Spines: Palp: femur 1p, patella 1p, tibia 8-7-9p, 7-8-6r, tarsus 12-11-8r, 8-11- 6p. I: femur 0, patella 0, tibia 5-10-9r, 5-6-8p, metatarsus 9-7-5r, 10-7-6p, tarsus 5-4-4r, 3-5- 2p. II: femur 0, patella 1p, tibia 5-4-5p, 2-5-3r, 1-1v, metatarsus 6-4- 1r, 7-3-4p, tarsus 4-3-1r, 3-3- 2p. III: femur 0, patella 3d, 6-6-9p, tibia 1-5-4p, 3-2-3r, metatarsus 2d, 6-5-4r, 7-5-5p, 0-0-3v, tarsus 2-2-3v, 0-6-5p, 1-1-1-1r. IV: femur 0, patella 11-10-0p, tibia 1-1-2v, metatarsus 1d, 1-3-3v, tarsus 2-8-5v, 1-2r, 1-2- 1p. Scopulae: absent on legs I–IV. Tibia of leg III with dorsal proximal depression ( Figure 8 (d)). Spermathecae with oval and large apical receptacles wider than ducts, which are straight and have the basal portion translucid and the middle portion well sclerotised, basal area largely sclerotised ( Figure 8 (e)).

Distribution

Known from Salta and Jujuy provinces, northern Argentina ( Figure 13 ).

Figures

Figure 6. Idiops minguito sp. nov., holotype male (MACN-Ar36714). (a) Carapace, dorsal view. (b) Labium and sternum, ventral view. (c) Eye group, dorsal view. (d) Leg I, prolateral view. (e) Leg I, ventral view. (f–g) Palpal tibia, retrolateral view. Scale bars = 1 mm.

Figure 7. Idiops minguito sp. nov., holotype male (MACN-Ar36714), left palpal bulb. (a) Prolateral. (b) Retrolateral. (c) Dorsal. Scale bar = 1 mm.

Figure 8. Idiops minguito sp. nov., paratype female (MACN-Ar36715). (a) Carapace, dorsal view. (b) Labium and sternum, ventral view. (c) Eye group, dorsal view. (d) Tibia III, prolateral view (arrow shows the dorsal proximal depression). (e) Spermathecae, dorsal view. D = duct; R = receptacle; SA = sclerotised basal area. Scale bars = 1 mm.

Figure 13. Map showing the distribution of the Idiops species treated in this work.