Ummidia insularis Santos & Ortiz & Sánchez-Ruiz 2022, new species
Creators: name: Santos, Gabriel De Los
name: Ortiz, David
name: Sánchez-Ruiz, Alexander
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Halonoproctidae
Ummidia
Ummidia insularis

description: Ummidia insularis new species
Figs. 1–6
Types. Holotype male (MNHNSD 09.1231). DOMINICAN REPUBLIC: Independencia Province, Lago Enriquillo and Isla Cabritos National Park, Cabritos island; 18.4951° N, 71.7221° W; ~ 20 m below sea level; 8 Jan. 2010; Gladys Rosado & Gabriel de los Santos, leg; wandering at around 20:00 hrs. Paratype female (MNHNSD 09.1187); same province as holotype: 200 m N of Puerto Escondido town: 18.3303° N, 71.5699° W; ~ 450 m above sea level; 28 Jan. 2005; Alexander Sánchez-Ruiz & Rolando Teruel leg.; leaf litter under a plant of Agave sp. (Agavaceae).
Etymology. Latin adjective that refers to the “double island” condition of the holotype of this species, which was collected on Cabritos, an island located in Lake Enriquillo, on the island of Hispaniola.
Diagnosis. Ummidia insularis sp. n. can be distinguished from most other New World Ummidia species by the following combination of characters: males with a comb of spinules on the retrolateral face of tarsus IV (Fig. 2F), a small number of spines on the prolateral and retrolateral faces of tibia I (Fig. 2A–B), and pedipalp bulb embolus evenly curved, not sinuous (Fig. 3A–C); females, by the shape of their spermathecae, including a narrow neck (Fig. 4F); both sexes, by lacking stripes or a pale patch on the abdomen (Figs. 1A, 4A) and by having the tarsi not distinctly pale (Figs. 2, 5). Males and females of U. insularis also differ from the other Antillean species— U. nidulans (Fabricius 1787), U. salebrosa (Simon 1892) and U. tunapuna Godwin & Bond 2021 —by the considerably smaller number of maxillary cuspules (16, 22; n=2 vs.>50) (Figs. 1D, 1F, 4E).
Description. Male (holotype). Carapace, legs and pedipalps very dark brown. Carapace rugose. Abdomen greyviolaceous, very rugose, sparsely covered by tiny hairs, without dorsal pale patch. Total length, 14.5. Carapace 6.5 long, 6.1 wide. Sternum 3.9 long, 3.5 wide. Caput high, 4.9 long. Mid-region between the ocular zone and fovea elevated. Fovea strongly procurved, “U” shaped (Fig. 1A): 0.4 long, 1.3 wide. Ocular region dark brown (Fig. 1B). Ocular tubercle slightly elevated, subrectangular: 0.90 long; 1.30 wide. Eight eyes in 2 rows. Anterior ocular row markedly procurved; posterior, slightly recurved. AME round: diameter 0.22. PME round: diameter 0.15. ALE ovoid: greater diameter 0.51. PLE ovoid: greater diameter 0.29. ALE-PLE distance 0.70 times the diameter of the PLE. Clypeus 0.33 wide. Sigillae poorly defined. Sternum covered by sparse erect hairs, mainly along the edges; mostly flat but bears some wide shallow depressions (Fig. 1D). Labium dome-shaped, higher on anterior region bearing long, thin, and erect setae (Fig. 1F). Labium 1.0 long, 1.3 wide. Six spiniform labial cuspules. Maxilla 2.4 long, 1.35 wide. Right maxilla with 20 spiniform cuspules; left maxilla, with 22. Chelicerae with 2 rows of teeth parallel to promargin on ventral face. Left chelicera: 9 teeth on anterior margin, 6 on posterior margin. Right chelicera: 9 teeth on anterior margin, 8 on posterior. Cheliceral rastellum comprises a marginal row of 8 very large, thick, dark spines, and a submarginal zone of about 20 spines, which are smaller extending further from margin. Posterior median spinnerets have a single digitiform segment; posterior lateral spinnerets have 3 segments (Fig. 1C, E). Book lungs apertures have smooth edges.
Appendages segment lengths. Pedipalp: femur 3.9, patella 1.8, tibia 3.4; total 9.1. Leg I: femur 5.6, patella 2.8, tibia 3.9, metatarsus 2.6, tarsus 1.2; total 16.1. Leg II: femur 5.4, patella 2.6, tibia 3.0, metatarsus 2.2, tarsus 1.2; total 14.4. Leg III: femur 4.5, patella 2.2, tibia 2.6, metatarsus 2.6, tarsus 2.0; total 13.9. Leg IV: femur 5.8, patella 2.4, tibia 3.9, metatarsus 4.2, tarsus 2.3; total 18.6. Leg formula: IV>I>II>III.
Trochanter of leg II possesses a shallow notch in the ventral-apical border (Fig. 3D). A distinct curly bracketshaped prominence located between the dorsal and medium-prolateral faces of leg III trochanter (Fig. 3E; see Fig. 4D for female paratype). Femur III considerably wider in baso-medial region than in apex of segment (Fig. 2C–D). Retrolateral inferior region of all patellae with a nodule. Tibia III has a saddle-shaped depression on its dorsal face, and a longitudinal yellow stripe on its prolateral face (Fig. 2C–D). Metatarsi I–II scopulated in apical 1/3 of segment; metatarsi III–IV lacking scopula. Tarsi not distinctly paler than rest of the segments (Fig. 2); tarsi I–II scopulated; tarsi III–IV lacking scopula. All tarsi dorsally with abundant filiform trichobothria; tarsi I/II with 3–4 claviform trichobothria next to base. Tarsus IV with comb of spinules on its lower retrolateral face (Fig. 2F). Paired claws on all legs have 1 or 2 teeth; the number of teeth often varies between left and right corresponding limbs. Unpaired claws are much smaller and lack teeth.
Appendages spination. Leg I (Fig. 2A–B): patella v3, tibia p2 r3 v11, metatarsus p1 r11, tarsus p3 r14; total 48. Leg II: tibia p2 r2 v13, metatarsus p3 r10, tarsus p4 r12; total 46. Leg III (Fig. 2C–D): patella d3 p4, tibia d7 p7 r7 v3, metatarsus d6 p5 r8 v8, tarsus p12 r16 v7; total 93. Leg IV (Fig. 2E): patella d20 p ~50 thick very short spinules (Fig. 3F–G), tibia p2 v9, metatarsus p8 r2 v18, tarsus p17 r11; total 137.
Genitalia. Pedipalpal bulb with long and slender embolus lacking denticles or fish-hook teeth; it is evenly curved, projected retrolaterally, especially in its apical half (Fig. 3A–C). Bulb 2.5 long.
Female (paratype). Carapace, legs and pedipalps, brown. Carapace smooth and shiny (Fig. 4A). Total length, 20.3. Carapace 6.7 long, 5.8 wide. Sternum 3.5 long, 3.9 wide. Caput high, 5.4 long. Fovea 0.7 long, 1.7 wide. Ocular region covered by small black speckles on yellowish background (Fig. 4B). Ocular tubercle 0.78 long, 1.53 wide. Anterior ocular row procurved; posterior row straight. AME/PME rounded: diameter 0.20.ALE ovoid: greater diameter 0.44. PLE ovoid: greater diameter 0.34. Distance between ALE/PLE 0.45 times the diameter of the PLE. Clypeus 0.34 wide. Two sigillae, occupying ¾ of sternal area; divided by a longitudinal thin septum and together they form a heart-shaped structure. Labium 1.0 long, 1.3 wide. Six spiniform labial cuspules (two missing). Maxilla length, 2.7; width, 1.4. Right maxilla with 18 spiniform cuspules; left maxilla, with 16. Left chelicera: 4 teeth on anterior margin; 6 on posterior. Right chelicera: 6 teeth on anterior margin; 8 on posterior.
Appendages segment lengths. Pedipalp: femur 3.2, patella 2.0, tibia 2.2, tarsus 2.2; total 9.6. Leg I: femur 3.4, patella 2.4, tibia 2.0, metatarsus 1.4, tarsus 1.1; total 10.3. Leg II: femur 3.1, patella 2.3, tibia 1.9, metatarsus 1.4, tarsus 1.2; total 9.9. Leg III: femur 3.0, patella 2.3, tibia 2.0, metatarsus 1.2, tarsus 1.3; total 9.8. Leg IV: femur 4.1, patella 2.4, tibia 2.4, metatarsus 2.2, tarsus 1.5; total 12.6.
Trochanter of legs I–II possess a shallow notch in the ventral-apical border (Fig. 4C). Tibia III with 1 longitudinal stripe on prolateral, and one on retrolateral faces (Fig. 5C–D). All tarsi and metatarsi lack scopula (Fig. 5 A–F). Retrolateral face of tarsus IV lacks spinules (Fig. 5F). Single tarsal claws of pedipalps and paired tarsal claws of all legs bear 1 internal tooth.
Appendages spination. Pedipalp: patella p1, tibia p25 r29, tarsus p28 r32; total, 115. Leg I (Fig. 5A–B): tibia p29 r34 v1, metatarsus p22 r26, tarsus p15 r15; total, 142. Leg II: tibia p17 r14 v1, metatarsus p22 r12, tarsus p18 r15; total, 99. Leg III (Fig. 5C–D): patella p9 d2, tibia p5 r3 d12, metatarsus p3 r4 d11 v2; total, 65. Leg IV (Fig. 5E): patella p 68 thick very short spinules, metatarsus p4, tarsus p13; total, 17.
Genitalia. Two three-partite non-twisted spermathecae (as defined by Decae [2010]) with narrow neck, arched to inner side and tending to converge at apex (Fig. 4F).
Distribution. This species is known from Cabritos island in Lake Enriquillo, and the surroundings of Puerto Escondido town, Independencia province, Dominican Republic (Fig. 6A). The two localities are nearly 25 km away.
Natural History. The male holotype was captured wandering at night in a xeromorphic scrub (Fig. 6B). The female paratype was found in a similar habitat (Fig. 6C) occupying a trap-door retreat made among leaf litter under Agave sp. (Agavaceae). The known altitudinal range of U. insularis goes from 20 m below sea level to 450 m above sea level.
description: Published as part of Santos, Gabriel De Los, Ortiz, David & Sánchez-Ruiz, Alexander, 2022, Ummidia insularis new species, first record of the family Halonoproctidae (Araneae: Mygalomorphae) for Hispaniola, pp. 442-452 in Zootaxa 5092 (4) on pages 443-450, DOI: 10.11646/zootaxa.5092.4.3, http://zenodo.org/record/5886464