Masteria jatunsacha 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 : 542-544

publication ID 10.11646/zootaxa.5005.4.4

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Masteria jatunsacha Dupérré & Tapia

sp. nov.

Masteria jatunsacha Dupérré & Tapia View in CoL , new species

Figs 2A, B View FIGURES 2 , 3A–D View FIGURES 3 , 20B View FIGURES 20 , 22A View FIGURES 22 , map. 1.

Type material. Male holotype from Napo Province, Ecuador, Jatun Sacha Natural Reserve (-01.666464 -77.617192) 400–430m, 10–15 Mar. 2020, pitfall, E.E. Tapia, N. Dupérré, A.A. Tapia ( QCAZ) GoogleMaps . Paratypes: 2♂ same data as the holotype ( ZMH-A0014697 , QCAZ) GoogleMaps GoogleMaps .

Etymology. The specific name is a noun in apposition taken from the type locality Jatun Sacha Natural Reserve, Napo, Ecuador.

Diagnosis. Males most resemble M. chalupas n. sp. and M. papallacta n. sp. due to the presence of spines on the retrolateral side of the male palpal tibia but can be distinguished from M. papallacta n. sp. by the grouped spines positioned on the apical half ( Fig. 3B, C View FIGURES 3 ), whilst they are positioned on the basal half in the latter species ( Fig. 9B, C View FIGURES 9 ); from M. chalupas n. sp. by the presence of 21 grouped spines ( Fig. 3C View FIGURES 3 ) vs. 14 grouped spines in the latter species ( Fig. 7B, C View FIGURES 7 ) and basal spine of metatarsus I shorter ( Fig. 22A View FIGURES 22 ), clearly longer in M. chalupas n. sp. ( Fig. 22B View FIGURES 22 ).

Description. Male (holotype): Total length: 2.79; carapace length: 1.37; carapace width: 1.07; abdomen length: 1.42. Carapace yellow with reticulation in the cephalic groove and pars thoracica, covered with long setae ( Fig. 2A View FIGURES 2 ). Chelicerae yellow; promargin with 11 teeth and ~10 smaller mesobasal teeth. Endites yellow without cuspules. Labium yellow without cuspules. Sternum yellow, covered with long setae ( Fig. 2B View FIGURES 2 ). Eyes: six eyes grouped; AME absent; ALE the largest; PLE oval; PME small and oval; posterior row slightly recurved ( Figs 2A View FIGURES 2 , 20B View FIGURES 20 ). Abdomen elongated, uniformly beige covered with long setae ( Fig. 2B View FIGURES 2 ). Spinnerets: PLS 1.15 (0.39/0.41/0.35). Legs coloration uniformly pale yellow. Leg formula 4123; leg measurements: I 4.44 (1.27/0.63/1.03/0.80/0.72); II 3.54 (1.02/0.43/0.81/0.69/0.59); III 3.38 (0.92/0.35/0.82/0.72/0.57); IV 4.55 (1.24/0.29/1.12/1.09/0.61). Leg spination: I: femur d1-1-1-1-1; tibia v1, p-1ap; metatarsus v1-1; II: femur d1-1-1-1-1, p1; patella v1, p1; tibia v1-1-1ap, p1; metatarsus v1-1-1; III: femur d1-1-1-1, p1; patella p1; tibia d1-1, v1-1-1-3ap, p1-1, r1-1; metatarsus d1-2, v2-2-3ap, p1, r1-1; IV: femur d1-1-1-1-1; patella v-1ap, r1; tibia d1, v2-1ap, p1-1-1, r1-1, metatarsus d1, v2-2-2ap, p1-1, r1-1- 1. Tibia I: P1 absent; P2 with an apical, narrow strong spine; P3 with two apical spines ( Fig. 22A View FIGURES 22 ). Metatarsus I with small basal spine ( Fig. 22A View FIGURES 22 ). Palp: palpal tibia 2x the length of cymbium, 2.6x longer than wide, with 21 grouped long spines on retrolateral side, positioned on apical half ( Fig. 3B, C View FIGURES 3 ); cymbium 2x longer than wide, with four apical spines; bulb rounded, with laminar twisted embolus ( Fig. 3C View FIGURES 3 ).

Female: unknown.

Distribution. Ecuador: only found at the type locality.

Natural History. Specimens were collected by pitfall between 400–430m in an evergreen lowland forest of the Napo-Curaray region ( Guevara et al. 2013b).


Museo de Zoologia, Pontificia Universidad Catolica del Ecuador













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