Umbyquyra, Gargiulo & Brescovit & Lucas, 2018

Gargiulo, Fabio de F., Brescovit, Antonio D. & Lucas, Sylvia M., 2018, Umbyquyra gen. nov., a new tarantula spider genus from the Neotropical region (Araneae, Mygalomorphae, Theraphosidae), with a description of eight new species, European Journal of Taxonomy 457, pp. 1-50 : 7-10

Umbyquyra gen. nov.

urn:lsid:zoobank.org:act:4AE10C23-FC0A-4379-B255-22DE2FAF022C

Type species

Umbyquyra paranaiba gen. et sp. nov.

Diagnosis

Umbyquyra gen. nov. presents stridulatory bristles on the palpal trocanther and first leg as the genera Acanthoscurria , Cyrtopholis , Nesipelma and Longilyra . It differs from these genera by a projected and well marked cephalic region ( Fig. 5 ) and mainly by the aspect of the genitalia: male palpal bulb compact and globose, tegulum short, embolus, palpal bulb with a short embolus presenting four keels, tibial apophysis with two branches not originating from a common base, and metatarsus I, when flexed, touches the retrolateral branch laterally ( Figs 7C , 8D ); female spermathecae with SR connected to a sclerotized basal plate with conspicuous ducts ( Fig. 7D ).

Etymology

Umbyquyra gen. nov. originates from the Tupi Indian language and means ‘pointed bird beak’, relative to the aspect of the short embolus of the palpal bulb. The gender is neuter.

Description

Total length: males 18–40, females 20–44. General color is dark brown with legs lighter brown. The dorsal side of abdomen covered with long reddish or golden hairs with a dark patch ( Fig 16F ), ventral side of abdomen dark brown, legs with long yellowish or reddish hairs ( Fig. 16F ). Carapace longer than wide. Cephalic region with a projection slightly raised defined by the thoracic grooves. Fovea procurve ( Fig. 5 A–B, D), straight ( Fig. 5C, E ) or recurve ( Fig. 5F ), some species with projection over the fovea ( Fig. 15E ). Eye tubercle slightly raised, wider than long. Eight eyes, ringed with black. Anterior row of eyes procurved, posterior row slightly recurved or straight ( Fig. 16E ). Labium as wide as long, quadrate, with 130 cuspules ( Fig. 6E ). Endites with distinct anterior lobe, with 90–230 cuspules on internal basal angle. Sternum oval with six sigilla. Tarsal scopulae dense and integral, only tarsus IV with some bristles in longitudinal line. STC with 4–5 small teeth ( Fig. 6A ). Tarsi I–IV with two rows of clavate trichobotria ( Fig. 6 C–D). Scopulae on all tarsi and metatarsi I–II integral and only apical on metatarsi III–IV. Stridulatory bristles on palpal trochanter with 13–25 bristles and 30–38 on trocanther of leg I, sometimes with very long bristles similar as the described for Longilyra , occupying all the length of trochanter in other difficult to observe as in Umbyquyra acuminata (Schmidt & Tesmoingt in Schmidt, 2005) gen. et comb. nov. ( Fig. 14 E–F). Umbyquyra palmarum gen. et comb. nov. ( Fig. 12 E–F), U. tapajos gen. et sp. nov. ( Fig. 24 E–F), U. tucurui gen. et sp. nov. ( Fig. 26 E–F), U. caxiuana gen. et sp. nov. ( Fig. 28 E–F) have bristles long and very large, varying in size and number. PLS threesegmented with digitiform apical segment. Male palpal bulb with oval tegulum, short embolus, four or five keels resembles Acanthoscurria , but differs by distribution of keels. Tibia I with two branches, not originating from common base, retrolateral and prolateral branch with strong spines; palpal bulb with oval tegulum ( Figs 7 A–C, 8A–D), in general with four keels (PS, PI, SA, A), but two species have a prolateral accessory keel (PAc). Umbyquyra palmarum gen. et comb. nov. have four keels. Female genitalia: spermatheca with heavy sclerotized basal area ( Fig. 7D ), in U. cuiaba gen. et sp. nov. basal area reduced, SR with short ( Fig. 11D ) or elongated ( Figs 7D , 15D ) ducts emerging or not from the basal area. Urticating hairs of type I and III present in both sexes.

Species included

Umbyquyra paranaiba gen. et sp. nov., U. cuiaba gen. et sp. nov., U. araguaia gen. et sp. nov., U. sapezal gen. et sp. nov., U. belterra gen. et sp. nov., U. caxiuana gen. et sp. nov., U. tucurui gen. et sp. nov., U. tapajos gen. et sp. nov., U. palmarum gen. et comb. nov., U. acuminata gen. et comb. nov. and U. schmidti gen. et comb. nov.

Distribution

Species of Umbyquyra gen. nov. are registered in the Brazilian states of Acre, Pará, Mato Grosso, Tocantins, Goiás, Mato Grosso do Sul, São Paulo and Bolivia, Province Sara ( Figs 29–31 ).

Figures

Fig. 5. Fovea, carapace. A. Umbyquyra schimidti gen. et sp. nov. B. U. sapezal gen. et sp. nov. C. U. caxiuana gen. et sp. nov. D. U. cuiaba gen. et sp. nov. E. U. paranaiba gen. et sp. nov. F. U. belterra gen. et sp. nov.

Fig. 7. Umbyquyra paranaiba gen. et sp. nov. A–C. Holotype, ♂ (IBSP 107411). A. Palp, prolateral. B. Retrolateral. C. Tibial apophysis, ventral. D. Paratype, ♀ (IBSP 111695), spermathecae, dorsal. Abbreviations: see Material and methods.

Fig. 8. Umbyquyra paranaiba gen. et sp. nov. Holotype, ♂ (IBSP 107411). A–C. Palpal bulb. A. Prolateral. B. Anterolateral. C. Retrolateral. D. Tibial apophysis, retrolateral. E. Stridulatory organ, trochanter, male palp. F. Stridulatory organ, trochanter I (arrows in E–F pointed the stridulatory bristles). Abbreviations: see Material and methods.

Fig. 16. Umbyquyra cuiaba gen. et sp. nov. A–C. Holotype, ♂, Cuiabá, Mato Grosso, Brasil (IBSP 167423). A. Palp prolateral. B. Retrolateral. C. Tibial apophysis, retrolateral. D–F. Paratype, ♀, Canarana, Mato Grosso, Brazil (IBSP 108933). D. Spermathecae, dorsal. E. Eye tubercle, dorsal. F. Abdomen, dorsal.

Fig. 15. Umbyquyra acuminata (Schmidt & Tesmoingt in Schmidt, 2005) gen. et comb. nov. A–C. ♂, Santa Cruz de la Sierra, Bolivia (ZMB 47188). A. Palp, prolateral. B. Retrolateral. C. Tibial apophysis, retrolateral. D–E. ♀, same locality (ZMB 47189). D. Spermathecae, dorsal. E. Carapace, lateral. Abbreviations: see Material and methods.

Fig. 6. Umbyquyra tucurui gen. et sp. nov., ♂, from Tucuruí, Pará, Brazil (IBSP 104716). A. Tarsal claws, leg I, prolateral view. B. Tarsal organ, dorsal. C. Trichobothrium, tarsi I, lateral. D. Row of trichobotria, tarsi I, dorsal (arrows indicate the trichobothria). E. Labium, ventral. F. Cuspules of labium, detail.

Fig. 14. Umbyquyra schmidti (Rudloff, 1996) gen. et comb. nov., ♂, Cuiabá, Mato Grosso, Brazil (IBSP 110728), A. Palp prolateral. B. Anterolateral. C. Retrolateral. D. Tibial apophysis, retrolateral. E. Stridulatory organ, palp trochanter. F. Trochanter I. Abbreviations: see Material and methods.

Fig. 12. Umbyquyra palmarum (Schiapelli & Gerschman, 1945) gen. et comb. nov. ♂, Canoa Quebrada, Mato Grosso, Brazil (IBSP 167427). A. Palp prolateral. B. Anterolateral. C. Retrolateral. D. Tibial apophysis, retrolateral. E. Stridulatory organ, palp trochanter. F. Trochanter I. Abbreviations: see Material and methods.

Fig. 24. Umbyquyra tapajos gen. et sp. nov., paratype, ♂, Flona do Tapajós, Belterra, Pará, Brazil (IBSP 161728). A. Palp, prolateral. B. Retrolateral. C. Anterolateral. D. Tibial apophysis, retrolateral. E. Stridulatory organ, trochanter. F. Trochanter I.

Fig. 26. Umbyquyra tucurui gen. et sp. nov., holotype, ♂, Tucuruí, Pará, Brazil (IBSP 104834). A. Palp, prolateral. B. Anterolateral. C. Retrolateral. D. Tibial apophysis, retrolateral. E. Stridulatory organ, trochanter. F. Trochanter I. Abbreviations: see Material and methods.

Fig. 28. Umbyquyra caxiuana gen. et sp. nov., holotype, ♂, Floresta Nacional de Caxiuanã, Pará, Brazil (MPEG 0967). A. Palp, prolateral. B. Anterolateral. C. Retrolateral. D. Tibial apophysis, retrolateral. E. Stridulatory organ, trochanter. F. Same, trochanter I. Abbreviations: see Material and methods.

Fig. 11. Umbyquyra palmarum (Schiapelli & Gerschman, 1945) gen. et comb. nov. A–C. Holotype, ♂, Barão de Melgaço River, Rondônia, Brazil (MACN 832). A. Palp prolateral. B. Retrolateral. C. Tibial apophysis, retrolateral. D. ♀, Chapada dos Guimarães, Mato Grosso, Brazil (IBSP 107257), spermathecae, dorsal.

Fig. 29. Geographic distribution records of species of Umbyquyra gen. nov.: U. belterra gen. et sp. nov., U. caxiuana gen. et sp. nov., U. tucurui gen. et sp. nov. and U. tapajos gen. et sp. nov.

Fig. 30. Geographic distribution records of species of Umbyquyra gen. nov.: U. acuminata (Schmidt & Tesmoingt in Schmidt, 2005) gen. et comb. nov., U. palmarum (Schiapelli & Gerschman, 1945) gen. et comb. nov., U. araguaia gen. et sp. nov., U. paranaiba gen. et sp. nov. and U. sapezal gen. et sp. nov.

Fig. 31. Geographic distribution records of species of Umbyquyra gen. nov.: U. cuiaba gen. et sp. nov. and U. schmidti (Rudloff, 1996) gen. et comb. nov.