Masteria amarumayu

Passanha, Victor & Brescovit, Antonio D., 2018, On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae), Zootaxa 4463 (1), pp. 1-73: 29-32

publication ID

http://doi.org/ 10.5281/zenodo.1441911

publication LSID

lsid:zoobank.org:pub:20E7F0F5-7592-47CE-B67F-36DE0124E76F

persistent identifier

http://treatment.plazi.org/id/03D95431-A22C-8E7C-FF36-49C7FBD47861

treatment provided by

Plazi

scientific name

Masteria amarumayu
status

n. sp.

Masteria amarumayu  n. sp.

( Figs 16View FIGURE 16, 17A –BView FIGURE 17, 30BView FIGURE 30, 32View FIGURE 32)

Types. BRAZIL. ♂ holotype, ♀ paratype, Rio Preto da Eva (2°41'42.62"S; 59°44'49.65"W), Amazonas, 07- 26.I.2015, E. G. Costa leg., deposited in IBSP 167147View Materials and 167148.GoogleMaps 

Additional material examined. BRAZIL, Amazonas: Manaus, Reserva Florestal Adolpho Ducke (2°57’42”S; 59°55’40”W), 1♂, 4.IV.1994, Equipe SMNK legGoogleMaps  . (SMNK 3603); 1♂, 10.I.1991, Equipe SMNK leg  . (SMNK 8627); 1♂, 02.X.1991, Equipe SMNK leg  . (SMNK 8626); 1♂, 16.X.1991, W. Paarman leg. (MCN 22004); 1 immature, 31.III. 1 998, H. Höfer leg. (MCN); 1♂, 1♀, 06.V.2002, E. P. Fagundes leg. (IBSP 167149; 167152); 1 immature, no data, T. Gasnier leg. (IBSP 167 151); 1♀, 1995, A. M. C. Martins leg. (IBSP 111292); INPA (3°08’S; 60°01’W), 1♂, 1♀, 1998, J. Adis leg. (IBSP 111325); Campus da Embrapa (2°54’04”S; 59°58'’41”W), 30.III.1998, Höfer leg. ( IBSP 16View Materials 7150). 

Etymology. From the Indian language Queshua, it is the name given to the Amazonas River before its discovery by Europeans and it means “the snake mother of the world”.

Diagnosis. Males of Masteria amarumayu  n. sp. resemble those of M. colombiensis  , M. downeyi  , M. lewisi  , M. yacambu  n. sp., M. mutum  n. sp. and M. aguaruna  n. sp. in the piriform palpal bulb. They differ from M. colombiensis  , M. downeyi  , M. lewisi  , M. yacambu  n. sp. and M. aguaruna  n. sp. in the median concavity in the distal area of embolus ( Fig. 16B, DView FIGURE 16), and from M. mutum  n. sp. in lacking the basal spine of metatarsus I ( Fig. 16CView FIGURE 16, 30BView FIGURE 30). Females are related to M. colombiensis  , M. mutum  n. sp. and M. aguaruna  n. sp. by having bilobed spermathecae, with the triangular ectal lobe with large glands on basis and ental lobe connected to ectal lobe. They differ from M. colombiensis  in the elongated ental lobe and, from M. mutum  n. sp. and M. aguaruna  n. sp. in the more tapered and higher ectal lobe ( Fig. 16E –FView FIGURE 16).

Description. Male ( SMNK 8626). Color: Carapace, legs and abdomen whitish. Total length 3.07. Carapace 1.41 long, 1.10 wide. Abdomen 1.66 long. Fovea 0.07. Clypeus 0.02. Ocular tubercle 0.16 long, 0.25 wide. Eyes: six, posterior row slightly recurved ( Fig. 16AView FIGURE 16). AME Absent, ALE 0.10, PME 0.04, PLE 0.10. Basal segment of chelicerae with 10 prolateral teeth, and 10-12 smaller mesobasal mesobasal teeth. Labium 0.22 long, 0.22 wide. Sternum 0.63 wide, 0.79 long. Palp: femur 0.82/ patella 0.41/ tibia 0.69/ tarsus 0.44/ total 2.36; Legs I: femur 1.25/ patella 0.57/ tibia 1.12/ metatarsus 0.82/ tarsus 0.72/ total 4.48; II: 1.19/ 0.41/ 0.88/ 0.82/ 0.63/ total 3.93; III: 0.94/ 0.47/ 0.69/ 0.79/ 0.66/ 3.55; IV: 1.32/ 0.53/ 1.16/ 1.16/ 0.72/ 4.89. Leg formula 4123; Spination: Legs I: patella v1- 3 ap, tibia v1-1 -1-1-1, r1, metatarsus v1-1 -1; II: femur p1, patella v1-3 ap, p1, tibia v1-1 -1-3ap, p1, metatarsus v1-1 - 1; III: femur p1, r1, patella v1-3 ap, p1, r1, tibia d1-1-1, v1-1 -3ap, p1, r1-1, metatarsus d1-1-1, v2-2 -3, p1-1-1, r1; IV: femur p1, r1, patella v1-3 ap, p1, r1, tibia v1-1 -1-3ap, p1, r2-1, metatarsus d1-1, v2-2 -2-3, p1-1-1, r1-1-1. Tibia I: P1 absent, P2 a short spine below P3, and P3 a rounded spine with strong and projected base. Metatarsus I with basal depression associated with prolateral processes of tibia I ( Fig. 16CView FIGURE 16, 30BView FIGURE 30). Palpal tibia 2.5 times length of cymbium, with dorsal and ventral row of elongated setae, without spines or grouped setae. Cymbium as long as wide, with five apical spines. Bulb piriform short embolus, one-third length of tegulum, with curved tip ( Fig. 16B, DView FIGURE 16). PLS: basal, medial and apical, 0.44, 0.41, 0.53 long.

Female ( IBSP 167152). Color: Carapace in dorsal view yellowish, carapace in ventral view, legs and abdomen whitish ( Fig. 17A –BView FIGURE 17). Total length 3.23. Carapace 1.60 long, 1.13 wide. Abdomen 1.63 long. Fovea 0.10. Clypeus 0.02. Ocular tubercle 0.16 long, 0.25 wide. Eyes: six, posterior row slightly recurved. AME absent, ALE 0.11, PME 0.05, PLE 0.08. Basal segment of chelicerae with 10 prolateral teeth, and 10-12 smaller mesobasal teeth. Labium 0.22 long, 0.25 wide. Sternum 0.75 wide, 0.91 long. Palp: femur 0.94/ patella 0.50/ tibia 0.72/ tarsus 0.72/ total 2.88; Legs I: femur 1.22/ patella 0.63/ tibia 1.07/ metatarsus 0.79/ tarsus 0.69/ total 4.40; leg II lost; III: 1.04/ 0.44/ 0.79/ 0.88/ 0.66/ 3.81; IV: 1.41/ 0.57/ 1.22/ 1.13/ 0.72/ 5.05. Spination: palp: femur p1, patella v1-1, p1, tibia d1b, v1-1, p1, tarsus v1 b; Legs I: femur p1, patella v1-3 ap, tibia v1-1 -1-3ap, metatarsus v1 b-1-1; leg II lost; III: femur p1, r1, patella v1-3 ap, p1, r1-1, tibia d1-1-1, v1-1 -3ap, p1, r1-1-1, metatarsus d1-1, v1-2 -3ap, p1-1, r1; IV femur p1, patella v1-3 ap, p1, r1, tibia v1-1 -1-3ap, p1, r1-1-1, metatarsus d1, v1-2 -3ap, p1-1, r1-1. Palpal claw with 17 teeth. Spermathecae bilobed, ectal lobe triangular, with thickened basis, ental lobe joined to ectal lobe by short duct ( Fig. 16E –FView FIGURE 16). PLS: basal, medial and apical, 0.44, 0.41, 0.50 long.

Variation. 4 males: total length 3.07–3.67.

Distribution. Known only from Manaus, state of Amazonas, Brazil ( Fig. 32View FIGURE 32).

SMNK

Staatliches Museum fuer Naturkunde Karlsruhe (State Museum of Natural History)

IBSP

Instituto Biologico de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Dipluridae

Genus

Masteria