Masteria chalupas 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 : 546-549

publication ID 10.11646/zootaxa.5005.4.4

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scientific name

Masteria chalupas Dupérré & Tapia

sp. nov.

Masteria chalupas Dupérré & Tapia View in CoL , new species

Figs 6A, B View FIGURES 6 , 7A–D View FIGURES 7 , 20D View FIGURES 20 , 22B View FIGURES 22 , map 1.

Type material. Male holotype from Ecuador, Napo, Tena, Colonso Chalupas Biological Reserve (-00.9014 - 77.88588) 1048m, 9–15 Mar. 2020, pitfall trap, E.E. Tapia, N. Dupérré & A.A. Tapia ( QCAZ). Paratypes. 2♂ same data as holotype ( QCAZ, ZMH-A0013145 ); one 1♂ from Ecuador, Napo, Tena, Colonso Chalupas Biological Reserve (-00.9019 -77.88588) 1044m, 9–15 Mar. 2020, pitfall trap, E.E. Tapia, N. Dupérré & A.A. Tapia (ZMH- A0013146) GoogleMaps .

Etymology. The specific name is a noun in apposition taken from the type locality Colonso Chalupas Biological Reserve, Napo, Ecuador.

Diagnosis. Males most resemble M. jatunsacha n. sp., and M. papallacta n. sp. but can be distinguished as such: from M. papallacta n. sp. by their twisted embolus ( Fig. 7B, D View FIGURES 7 ) while straight in M. papallacta n. sp. ( Fig. 9B, C View FIGURES 9 ); from M. jatunsacha n. sp. by the presence of 14 grouped spines on the retrolateral side of the male palpal tibia ( Fig. 7B, C View FIGURES 7 ), while 21 grouped spines are present in the latter species ( Fig. 3C View FIGURES 3 ), and the longer basal spine of metatarsus ( Fig. 22B View FIGURES 22 ), shorter in M. jatunsacha n. sp. ( Fig. 22A View FIGURES 22 ).

Description. Male (holotype): Total length: 1.97; carapace length: 1.04; carapace width: 0.74; abdomen length: 0.93. Carapace light yellow with reticulation in the cephalic groove and pars thoracica, covered with long setae ( Fig. 6A View FIGURES 6 ). Chelicerae yellow; promargin with 10 teeth and ~9 smaller mesobasal teeth. Endites whitish without cuspules. Labium whitish without cuspules. Sternum whitish, covered with long setae ( Fig. 6B View FIGURES 6 ). Eyes: six eyes grouped; AME absent; ALE the largest; PLE oval; PME the smallest, oval; posterior row recurved ( Figs 6A View FIGURES 6 , 20D View FIGURES 20 ). Abdomen elongated, uniformly beige covered with elongated setae ( Fig. 6B View FIGURES 6 ). Spinnerets: PLS 0.69 (0.24/0.19/0.26). Legs coloration uniformly pale yellow. Leg formula 4123; leg measurements: I 2.64 (0.73/0.46/0.62/0.42/0.41); II missing; III 1.95 (0.56/0.27/0.37/0.41/0.34); IV 2.72 (0.79/0.26/0.64/0.60/0.43). Leg spination: I: femur d1-1-1-1-1; metatarsus v1; II missing; III: femur d1-1-1-1, p1; patella p1; tibia d1-1, v1-1-1-3ap, p1-1, r1-1; metatarsus d1-2, v2-2ap, p1, r1-1; IV: femur d1-1-1-1-1; patella v-1ap, r1; tibia v2-1ap, p1-1-1, r1-1, metatarsus v1-1-2ap, p1-1. Tibia I: P1 absent; P2 with an apical, narrow strong spine; P3 with two apical spines ( Fig. 22B View FIGURES 22 ). Metatarsus I with elongated basal spine ( Fig. 22B View FIGURES 22 ). Palp: palpal tibia 1.6x the length of cymbium, 2.6x longer than wide, with 14 grouped long spines on retrolateral side, positioned on apical half ( Fig. 7 View FIGURES 7 A-C); cymbium 2x longer than wide, with four apical spines; bulb constricted, with laminar twisted embolus ( Fig. 7C View FIGURES 7 ).

Female: unknown.

Distribution. Ecuador: only found at the type locality.

Natural History. Specimens were collected by pitfall trap between 1044–1048m in an evergreen piemontane forest of the northern part of the oriental Andean mountain range ( Guevara et al. 2013a).


Museo de Zoologia, Pontificia Universidad Catolica del Ecuador













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