Masteria pasochoa Dupérré & Tapia, 2021

Dupérré, Nadine, Tapia, Elicio, Quandt, Dietmar, Crespo-Pérez, Verónica & Harms, Danilo, 2021, From the lowlands to the highlands of Ecuador, a study of the genus Masteria (Araneae, Mygalomorphae, Dipluridae) with description of seven new species, Zootaxa 5005 (4), pp. 538-568 : 553-557

Masteria pasochoa Dupérré & Tapia , new species

Figs 12A, B , 13A–D , 14A, B , 15A , 20G, H , 23A , map 1.

Type material. Male holotype from Ecuador, Pichincha Province, Valle Chillos, Pasochoa Forest Reserve (- 0.443585 -78.507632) 3080m, June 2013, E.E. Tapia, N. Dupérré ( QCAZ) .

Female allotype: Pichincha Province, Pululahua Geobotanical Reserve (00.059720 –78.509230), 2128m, 2 August 2015, E.E. Tapia, N. Dupérré, A.A. Tapia ( QCAZ) .

Etymology. The specific name is a noun in apposition taken from the type locality the Pasochoa Reserve.

Diagnosis. Males most resembles M. colombiensis , M. lewisi and M. amarumayu but can be distinguished as such: from M. colombiensis by the presence of six eyes ( Fig. 12A ), eight in the latter species ( Passanha & Brescovit 2018: fig. 13A); from M. lewisi by the absence of 4–6 short strong spines on palpal tibia ( Fig. 13B ) that are present in the latter ( Passanha & Brescovit 2018: fig. 15B); and from M. amarumayu by the presence of P1 ( Fig. 23A ) that is absent in the latter ( Passanha & Brescovit 2018: fig. 16C). Females are distinguished from all species by their unique internal genitalia with unilobed spermathecae, and large, triangular spermathecae bases ( Fig. 15A ).

Description. Male (holotype): Total length: 4.10; carapace length: 1.95; carapace width: 1.38; abdomen length: 2.15. Carapace light brown with reticulation in the cephalic groove, radiating lines and pars thoracica; pars thoracica with arched row of long strong macrosetae ( Fig. 12A ). Chelicerae yellow; promargin with nine teeth and ~15 smaller mesobasal teeth. Endites yellow without cuspules. Labium yellow without cuspules. Sternum yellow ( Fig. 12B ). Eyes: six eyes grouped; AME absent, ALE oval; PLE the largest; PME the smallest, oval, posterior row recurved ( Figs 12A , 20G ). Abdomen elongated, whitish-gray covered with long setae ( Fig. 12B ). Spinnerets: PLS 1.55 (0.58/0.43/0.54). Leg formula 4123; leg measurements: I 5.28 (1.45/0.71/1.35/0.94/083); II 4.37 (1.24/0.62/0. 88/0.89/074); III 4.13 (1.17/0.55/0.78/0.94/0.69); IV 5.53 (1.55/0.68/1.23/1.21/0.86). Leg spination: I: d1-1-1-1-1; tibiae v1-1; II: femur d1-1-1-1; patella v2ap, p1; tibia v1-2-1, p1; metatarsus v1-1-1, p1; III: femur d1-1-1; patella d2-2, p1, v2ap; tibia d1-1, v2-2, p2-2, r2-2; metatarsus d1-2, v1-1-2ap, p1, r1-1; IV: femur d1-1-1; patella pd1, v2ap; tibia d1-1-1, v1-1-2ap, p1-1-1, r1-1-1, metatarsus d1, v2-2-1ap, p1-1, r1-1-1. Tibia I: P1 triangular, P2 with an apical strong spine; P3 with a with two apical spines ( Fig. 23A ). Metatarsus I with large, rounded basal spine ( Fig. 23A ). Palp: palpal tibia 2x the size of cymbium, 3x longer than wide ( Fig. 13A ); cymbium 2x longer than wide, with four apical spines ( Fig. 13A, B ); palpal bulb elongated-oval, embolus short, straight with strongly bend tip ( Fig. 13C ).

Female (allotype): Total length: 5.04; carapace length: 2.35; carapace width: 1.94; abdomen length: 2.69. Carapace light brown with reticulation in the cephalic groove, radiating lines and pars thoracica; pars thoracica with arched row of long strong macrosetae ( Fig. 14A ). Chelicerae light brown; promargin with 10 teeth and ~18 small- er mesobasal teeth. Endites yellow without cuspules. Labium yellow without cuspules. Sternum yellow, without sigilla ( Fig. 14B ). Eyes: six eyes grouped; AME absent, ALE and PLE almost equal; PME the smallest, oval; posterior row strongly recurved ( Figs 14A , 20H ). Abdomen elongated, grayish covered with long setae ( Fig. 14A ). Spinnerets: PLS 1.81 (0.66/0.38/0.77). Legs coloration uniformly pale yellow. Leg measurements: I missing; II missing; III 4.96 (1.48/0.68/0.95/0.98/0.87); IV 6.69 (1.73/0.80/1.70/1.48/0.98). Leg spination: I and II missing; III: femur d1-1-1-1; patella d1-2, p1, v1ap; tibia d1-1, v2-2, p1-1, r1-1; metatarsus d1-2, v1-1-2ap, p1, r1-1; IV: femur d1-1-1-1; patella p1, v2ap, r1; tibia d1-1, v1-2-2ap, p1-1-1, r1-1, metatarsus d1, v2-1-1ap, p1-1, r1-1. Palpal claw with ~15 teeth.

Genitalia: unilobed spermathecae with large, oval ectal lobes (EcL), ental lobes (EnL) small and triangular; spermathecae bases wide, triangular; glandular region with large glands widely interspaced on the spermathecae bases ( Fig. 15A ).

Distribution. Known from two localities in Pichincha Province.

Natural History. The male specimen was hand collected at 3080m in an inter-Andean humid montane forest ( Valencia & Jørgensen 2008) and the female was hand collected at 2128m, in an evergreen mountain shrubland of the northern Ecuadorian Andes ( Josse & Aguirre 2013).

Note. Even though the male and female were not collected at the same locality (~ 50km), the specimens were matched based on eyes configuration, size, and altitudinal range.

Figures

FIGURES 12A–D. Masteria pasochoa n. sp. (holotype). A. Male habitus, dorsal view. B. Male habitus, ventral view. Scale bars: 0.5mm.

FIGURES 13A–D. Masteria pasochoa n. sp. (holotype). A. Male palp, prolateral view. B. Male palp, retrolateral view. C. Male palpal bulb, prolateral view. D. Male leg I, prolateral view. Scale bars: 0.1mm.

FIGURES 14A, B. Masteria pasochoa n. sp. (allotype). A. Female habitus, dorsal view. B. Female habitus, ventral view. Scale bars: 0.5mm.

FIGURES 15A. Masteria pasochoa n. sp. (allotype), female internal genitalia, dorsal view.

FIGURES 20A–H. Cephalothorax, dorsal view. A. Masteria hirsuta L. Koch, 1873 (female holotype). B. Masteria jatunsacha n. sp. (male holotype). C. Masteria machay n. sp. (female holotype). D. Masteria chalupas n. sp. (male holotype). E. Masteria papallacta n. sp. (male holotype). F. Masteria papallacta n. sp. (female allotype). G. Masteria pasochoa n. sp. (male holotype). H. Masteria pasochoa n. sp. (female allotype).

FIGURES 23A–C. Prolateral processes of leg I, male. A. Masteria pasochoa n. sp. (holotype). B. Masteria lasdamas n. sp. (holotype). C. Masteria otongachi n. sp. (holotype).