Uduba orona, Griswold & Ubick & Ledford & Polotow, 2022

Griswold, Charles, Ubick, Darrell, Ledford, Joel & Polotow, Daniele, 2022, A Revision of the Malagasy Crack-Leg Spiders of the Genus Uduba Simon, 1880 (Araneae, Udubidae), with Description of 35 New Species from Madagascar, Proceedings of the California Academy of Sciences 67, pp. 1-193 : 66-67

Uduba orona , new species

Figures 75 D, E , Maps 4, 15.

Type material. Holotype female ( CASENT9006101 ) from soil at 1625m elevation on ridge E of Volotsangana River, 22°11ʹ39ʺS, 46°58ʹ16ʺE, Andringitra Reserve , Fianarantsoa Province, Madagascar, collected by Steve Goodman on 12–13 December 1993, deposited in FMNH.

Etymology. The species epithet is from a Malagasy word for nose, orona, referring to the shape of the median lobe (ML); a noun in apposition.

Diagnosis. Uduba orona belong to Group I.c, the Uduba funerea group ( Map 15 ) of Group I, the Epigynal atrium group. They are ecribellate with a colulus. The female has the epigynal plate with median lobe surrounded by depressed atrium; the median lobe is broad and extends to or bulges across epigastric furrow, ML length greater than 1.75 times width ( Fig. 75 D ). The male of Uduba orona is unknown.

Description. Male unknown. Female (holotype): Total length 14.50. Markings typical of

Uduba . Carapace 7.60 long, 5.20 wide, 3.00 high; clypeus 0.55 high. Eye diameters: AME, ALE and PLE 0.26, PME 0.22. Chelicerae 3.50 long; sternum 3.40 long, 2.60 wide; labium 1.70 long; palpal coxae 2.55 long. Ratios– carapace length / width = 1.46, carapace height / width = 0.58, PER / carapace width = 0.41, PER/OAL = 3.24, PER/AER = 1.35, OAL/OQL = 1.22, OQP/ OQA = 1.09, clypeus height / AME = 2.12, cheliceral length / clypeus height = 6.36, sternum length / width = 1.31, palpal coxa length / width = 2.32, femur I length / carapace width =1.13, metatarsus I length / carapace width = 0.79, femur IV length / carapace width = 1.10, palpal tarsus length / carapace width = 0.48, palpal tibia length / palpal patella length = 1.92, palpal tarsus length / palpal tibia length = 1.67, palpal tarsus length / palpal femur length = 0.86, palpal tibia length / palpal patella length = 1.15. With a colulus. Spination: palpus–femur d0-0-1, patella p1-0, tibia d0-1-0, p2-0, tarsus p2-1; leg I–femur d1-0-0, p0-0-1, tibia v2-2-2-0, metatarsus v2-2-3; leg II–femur d1-0-0-1, p0- 1-1-0, tibia p0-0-1-0, v1-1-1-0, metatarsus v2-2-3; leg III–femur p1-1-1-1, r0-1-0-0, tibia p0-1-1- 0, v1-2-1, r0-1-1-0, metatarsus p1-2-2, v2-2-2, r1-1-2; leg IV–femur d1-0-0, tibia v2-2-2, metatarsus p0-1-2, v1-2-2-2, r1-1-2. Scopulae: strong ventral beneath tarsi I–IV and metatarsus I and II and apices of metatarsi III and IV. Leg measurements: I: 5.90 + 2.70 + 5.10 + 4.10 + 2.30 = 20.10; II: 5.10 + 2.50 + 4.10 + 3.60 + 2.10 = 17.40; III: 4.00 + 2.10 + 2.50 + 3.40 + 1.90 = 13.90; IV: 5.70 + 2.30 + 4.80 + 5.50 + 2.40 = 20.70; palpus: 2.90 + 1.30 + 1.50 + NA + 2.50 = 8.20. Leg formula 4123. Female genitalia: epigynal plate with median lobe surrounded by depressed atrium ( Fig. 75 D ), plate width 1.28 times length; atrium sides concave, atrium width 1.35 times atrium length; epigynum length 1.35 times atrium length, atrium width 0.78 times epigynum width; atrium width at side of ML equals ML width; atrium and ML extend as lobe posteriad of epigastric groove ( Fig. 75 D ); median lobe triangular, wider at base, median lobe length 1.85 times width, ML length equals atrium length, 0.69 times epigynal length; lateral lobes narrow, atrium width 8.75 times LL width; copulatory openings beneath anterolateral margins of atrium. Vulva ( Fig. 75 E ) with spermathecal ducts making a large lateral copulatory duct, anteriorly two narrow spirals, and a posteriorly a lobate base, vulva length 0.62 times width, vulva width 5.25 times distance between fertilization ducts.

Variation. Unknown: only the holotype female of Uduba orona is known.

M aterial examined. MADAGASCAR: Fianarantsoa Province: ca. 38 km S Ambalavao, Andringitra Reserve , on ridge E of Volotsangana River, camp #4, 22°11ʹ39ʺS, 46°58ʹ16ʺE, elev. 1625m, ex soil sample, 12–13 December 1993, S. Goodman, (holotype, CASENT9006101 , 1♀, FMNH) .

Natural history. The holotype female of the ecribellate Uduba orona was collected from soil in a montane rainforest.

Distribution. Uduba orona are known only from the type locality in montane rainforest at the Andringitra Reserve in far southern Madagascar (Maps 4, 15).

Figures

FIGURE 75. Uduba spp., female genitalia drawings. A, B. U. lavitra, new species, holotype (CASENT9030898) from Torotorofotsy. C, F. U. lavitra, new species, paratype (CASENT9030895) from Ambatovy. D, E. U. orona, new species, holotype (CASENT9006101) from Andringitra Reserve. A, C, D. Epigynum, ventral. B, E, F. Vulva, dorsal. Illustrations by Charles Griswold. Scale bar = 0.5 mm.

MAP 15. Distribution of Group I.c, the Uduba funerea MAP 16. Distribution of Group II, the Epigynum lateral group of Group I, the Epigynal atrium group: Uduba projection group, or Uduba evanescens group: Uduba funerea Simon, 1906, U. barbarae, U. lavitra, U. orona and evanescens (Dahl, 1901), U. rakotofrah, U. volana, U. milamina. U. heliani, U. goodmani and Uduba pseudoevanescens.