Umbyquyra palmarum Gargiulo & Brescovit & Lucas 2018, gen. et comb. nov.

Umbyquyra palmarum (Schiapelli & Gerschman, 1945) gen. et comb. nov.

Figs 5C, 11, 12, 30

Cyrtopholis palmarum Schiapelli & Gerschman, 1945: 182, pl. IX.

Cyrtopholis palmarum – Gerschman & Schiapelli 1973: 68, figs 1–5. — Schmidt 1993: 63, figs 68–69; 1997: 18, 149–150.

Acanthoscurria palmarum – Schmidt 2003: 133, 142, figs 170–171.

Diagnosis

Males and females of U. palmarum gen. et comb. nov. differ from those of the other species by the strongly procurved fovea, like a half moon, delimitating the very long projection of the cephalic region (Fig. 5D) and male palpal bulb with well-developed A and SA keels (Figs 11A, 12 A–B). Female spermathecae with antero-medially excavated base and SR with very short ducts (Fig. 11D).

Type material

Holotype

BRAZIL: ♂, Rondônia, Barão de Melgaço River, 11°45′11.3″ S, 60°56′24.1″ W, Sep. 1936, Vellard leg. (MACN 832).

Additional material

BRAZIL: Mato Grosso: 1 ♀, Chapada dos Guimarães, 15°27′46.9″ S, 55°44′59.2″ W, 1982. R.R. da Silva leg. (IBSP 107257); 2 ♂♂, Lucas do Rio Verde, PCH Canoa Quebrada, 13°04′24.9″ S, 55°55′11.1″ W, V. Azarias leg. (UFMT 0963, IBSP 167427); 1 ♂, Porto dos Gauchos, 11°21′57.1″ S, 57°28′48.1″ W, 31 Aug. 1962, H. Schulze leg. (IBSP 103628).

Description

Male (holotype, MACN 832)

In life: according to Vellard (1945), reddish brown color with golden bristles covering all dorsal face of body. In ethanol: same color as U. paranaiba gen. et sp. nov. Total length 23. Carapace 8.8 long, 8.4 wide. Clypeus 0.2. AME 0.37 long, 0.35 wide; PME 0.25 long, 0.2 wide; ALE 0.25 long, 0.25 wide; PLE 0.35 long, 0.22 wide. Basal segment of chelicerae with 10 teeth. Labium 1.3 long, 1.8 wide, with 120 cuspules. Endites with 135–132 cuspules. Eye tubercle: 1.2 long, 2.0 wide. Stridulatory bristles with around 15 bristles on palp trochanter and 45 on leg I (Fig. 11 E–F). Palp: femur 8.5, patella 2.6, tibia 6.9, tarsus 2.3, total 20.3. Leg I femur 12.3, patella 4.5, tibia 11, metatarsus 9.6, tarsus 5.6, total 43. II 10.8, 3.5, 9, 9, 5.2, 37.5. III 9.6, 3.3, 8, 10.2, 4.4, 35.5. IV 12.3, 4, 11, 14.5, 5.6, 47.4. Spination: palp: femur d0-0-1app, tibia d0-1p-2p-2p-1app, v0-0-2p-0ap, p0-0-1-2-2-1-1-1-1- 1ap. Legs I femur d0-0-1app, tibia v1-0-1-1-1-1ap-1app, p1-0-1-0ap, metatarsus v-0-0-0-1ap. II femur d0-0-1app, tibia d0-1p-0-1p-1p-0-1app, v1-0-1-2-1ap, metatarsus v0-1-0-1-0-0-2ap-1app. III tibia v0- 1-1r-1apr-1ap-1app, p0-2-0-1ap, r1-1-1ap, metatarsus v1-1-0-1-2ap, p1-1-1-1-0-2ap, r0-1-0-1-1ap, r0- 1-0-1ap. IV tibia d0-1r-0-1r-0-1apr, v0-2-1-1r-1-1apr-2app, p0-1-1-0ap, metatarsus d0-1r-0app, v1- 1-1p-2r-1r-1-1p-2-1r-1p-1p-1r-2app-1ap, p0-0-1-0-1ap. Tibial apophysis of leg I: retrolateral branch well-developed with two strong distal spines and two median setae; prolateral branch weakly projected with distal spine and sub basal spine (Figs 11C, 12D). PLS basal, median and apical segments 2.3, 1.7, 2.0 long, respectively.

Female (IBSP 107257)

In ethanol: same as U. paranaiba gen. et sp. nov. Total length 40.0. Carapace 13.5 long, 12.5 wide. Clypeus 0.3. AME 0.35 long, 0.3 wide; PME 0.2 long, 0.2 wide; ALE 0.25 long, 0.45 wide; PLE 0.3 long, 0.3 wide. Basal segment of chelicerae with 11 teeth. Labium 2.1 long, 2.7 wide, with 125 cuspules. Endites with 140–142 cuspules pointed. Eye tubercle: 1.9 long, 2.4 wide. Stridulatory bristles as in male. Palp: femur 9, patella 5.3, tibia 6.9, tarsus 5.8, total 27. Leg I femur 13.4, patella 7.4, tibia 9.4, metatarsus 4.2, tarsus 5.4, total 39.8. II 12, 6.5, 6.5, 6.4, 7.2, 35.7. III 10.3, 7.2, 6.2, 9.1, 5.1, 37.9. IV 12.8, 6.3, 8.8, 10, 5.1, 43. Spination: palp: tibia v0-0-0-1p-1r-3ap, p0-0-1-1ap. Legs I femur d0- 0-1apr, tibia v0-1-2app, r0-1-0-3ap, metatarsus v-0-1ap, r0-1ap. II femur d0-0-1apr, tibia v0-1-0-3ap, p0-1-0-1ap, metatarsus v0-1-0-0-2apr. III femur 0-0-1apr, tibia v0-3-0-1app-1ap-1apr, p0-2-0-0ap, r1- 1-1ap, metatarsus d1-2p-0-2ap, v1-1r-1p-0-1ap, p1-1p-1p-1r-1r-1-1ap. IV femur 0-0-1app, tibia v0-1p- 2-1-1ap, 0-1-2ap, r0-1-0ap, metatarsus v1r-1r-2p-0-1p-1p-1p-1r-1r-1-2p-2ap, 0-0-1-0ap, p0-0-1-0ap, r0-1-0-1ap. PLS basal, median and apical segments 2.1, 2.6, 3.5 long, respectively. Spermathecae with RS rounded, apart from each other by approximately its own diameter (Fig. 11D).

Distribution

Brazil: states of Rondônia and Mato Grosso (Fig. 30).

Natural history

Jean Vellard, in 1945, collected two males in a rotten palm tree.According to the author, the spiders were very aggressive and no webs in the rotten palm tree, were was found.