Uduba ibonia Griswold, Ubick, Ledford & Polotow, 2022, new species
Creators: name: Griswold, Charles
name: Ubick, Darrell
name: Ledford, Joel
name: Polotow, Daniele
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Udubidae
Uduba
Uduba ibonia

description: Uduba ibonia, new species   
Figures 7 F, 9 E, 11 F, 20 B, 29 F, 45 A–C, 73 A, B, 81 C, F, Maps 1, 13.  
 Type material. Holotype male (CASENT9006038) from montane rainforest at 1100m elevation at 7 km W Ranomafana, ca. 21º12ʹS, 47º27ʹE, Fianarantsoa Province, Madagascar, collected 22–31 October 1988, W. Steiner, deposited in the USNM. Paratype female (CASENT9006035), from Parc National Ranomafana, Talatakely, 21º14.9ʹS, 47º25.6ʹE, Fianarantsoa Province, Madagascar, collected 11 April 1998 by D. Kavanaugh, deposited in CAS.   
 Etymology. The species epithet, ibonia, refers to an epic poem that has been told for at least several hundred years in various forms across the island of Madagascar; a noun in apposition.   
  Diagnosis. Uduba ibonia  belong to Group I.a, the Uduba dahli group (Map 13) of Group I, the Epigynal atrium group. They are cribellate, with a very small divided cribellum (Fig. 20 B). Males can be distinguished from those of other cribellate Uduba by having the palpus with TA3 a slender, pointed screw (Fig. 29 F) and the TA2 an elongate blade (Figs. 29 F, 45 A, B ). The females can be distinguished from those of other cribellate Uduba that have an epigynal plate with median lobe surrounded by depressed atrium by having the posterior margin of atrium divided at ML apex, atrium with atrial side plate (AtSp) next to ML (Fig. 73 B), ML short, broad, length about equal to width; U. ibonia females are distinguished from those of U. platnicki in that the former have a divided cribellum (Fig. 20 B), whereas U. platnicki are ecribellate.   
 Description. Male (Holotype). Total length 14.29. Markings as in Figs. 9 E, 11 F. Carapace 8.36 long, 6.07 wide, 2.50 high; clypeus 0.43 high. Eye diameters: AME 0.34, ALE 0.32, PME 0.36, PLE 0.43. Chelicerae 3.79 long; sternum 3.86 long, 2.93 wide; labium 1.82 long; palpal coxae 2.75 long. Cribellum divided, very small. Spination: palpus–femur d0-0-1, p0-0-1, r0-0-1, tibia p1-0; leg I–femur d1-1-0-1, p0-0-0-2, r0-0-0-1, tibia d0-0-0-1, p0-1-1-0, v2-2-2-2, r0-1-1-0, metatarsus p1-1-0, v2-2-3, r1-1-0; leg II–femur d1-1-0-1, p0-0-1, r0-1-0-1, tibia d0-0-0-1, p0-1-1- 0, v2-2-2-2, r0-1-1-0, metatarsus p1-1-0, v2-2-3, r1-1-0; leg III–femur d1-1-1, p0-1-1-1, r0-1-1-0, tibia d0-0-1-0, p0-1-1-0, v2-0-2, r0-1-1-0, metatarsus p1-1-1-1, v2-2-2, r1-1-0-1; leg IV–femur d1- 1-0-1, p0-1-0-1, r0-0-0-1, tibia d0-0-1-0, p0-1-1-0, v2-2-2, r0-1-1-0, metatarsus p1-1-2, v2-2-2, r2- 1-2-1-2. Scopulae: cymbium, apicodorsal; strong beneath all tarsi. Leg measurements: I: 7.64 + 3.00 + 7.71 + 8.43 + 4.29 = 31.01; II: 7.00 + 2.86 + 6.36 + 7.21 + 3.79 = 27.21; III: 5.86 + 2.71 + 4.00 + 6.07 + 3.01 = 21.71; IV: 8.14 + 2.86 + 7.14 + 9.71 + 4.14 = 32.00; palpus: 3.14 + 1.29 + 1.43 + NA + 3.86 = 9.71. Leg formula 4123. Male palp (Ranomafana, CASENT9006036) (Figs. 45 A–C): palpal tibia 0.38 times cymbial length, RTA a short triangle (Fig. 45 A), length 0.21 tibia length, length 0.86 times width, with pointed apex, VTA conical, with broad base and slender apex (Fig. 45 B), length 0.31 tibia width, VTA length 1.60 times width; tibia with a long, slender prolateral spine but lacking stout spines; tegulum convex, without ridge, tegulum length 0.90 times width (Figs. 45 A, B), TA1 extends distad of tegulum apex, TA1 extends past TA3 apex by 1.285 times tegulum length; TA3 a slender, pointed screw, TA3 ends before TA2 apex, TA2 an elongate triangular blade, visible behind and beyond TA3, apex rounded (Fig. 29 F); MA simple with small prolateral hook (Fig. 45 A), origin at 0.46 times tegulum length, tegulum apex at 0.29 tegulum length from MA apex, length (including apical processes) 0.78 times width, MA small (Figs. 45 A, C), length 0.20 tegulum length, width 0.23 tegulum width; conductor fan concave. Female (Paratype, CASENT9006035): Total length 12.50. Markings as in Fig. 7 F. Carapace 6.70 long, 5.50 wide, 2.50 high; clypeus 0.45 high. Eye diameters:AME and ALE 0.24, PME 0.22, PLE 0.26. Chelicerae 3.20 long; sternum 2.80 long, 2.30 wide; labium 1.50 long; palpal coxae 2.30 long. Cribellum divided, very small (Fig. 20 B ). Spination: palpus–femur d0-0-2, patella p1, tibia p2-1, tarsus p2-1-1; leg I–femur d1-0-0-2, tibia v2-2-2-1, metatarsus v2-2-3; leg II–femur d1-0-0, p0-0- 1, tibia v1-1-1-2, metatarsus v2-2-3; leg III–femur d0-0-0-1, p0-0-1-1, r0-0-1-1, tibia d0-1-0, p0- 1-1-0, v2-0-2, r0-1-1-0, metatarsus p1-2-2, v2-2-2, r1-1-2, tarsus v0-1-0; leg IV–femur d1-1-0, r0- 0-1, tibia v1-2-2, r0-1-1-0, metatarsus p1-1-0-2, v2-1-2-2, r1-2-1. Scopulae: strong ventral beneath all tarsi, beneath metatarsi I and II and apices of metatarsi III and IV. Leg measurements: I: 4.70 + 2.30 + 3.90 + 3.70 + 2.30 = 16.90; II: 4.20 + 2.20 + 3.20 + 3.10 + 2.10 = 14.80; III: 3.40 + 1.90 + 2.00 + 2.80 + 1.90 = 12.00; IV: 4.80 + 2.00 + 3.80 + 4.90 + 2.40 = 17.90; palpus: 2.40 + 1.20 + 1.40 + NA + 2.30 = 7.30. Leg formula 4123. Female genitalia (Figs. 73 A, B, 81 C, F): epigynal plate with median lobe surrounded by depressed atrium, shallow beside ML and forming deep sulci laterally (Fig. 73 B), epigynal plate width 1.43 times length; atrium sides weakly concave, atrium width 1.87 times atrium length; epigynum length 1.79 times atrium length, atrium width 0.73 times epigynum width; atrium plate width at side of ML 0.18 times ML width (Fig. 81 C), atrium lateral sulcus width at side of ML 0.21 times ML width; atrium and median lobe arise well anteriad of epigastric groove (Fig. 81 C ), atrium origin at 0.26 of epigynal plate length, median lobe broad, widest at base, median lobe length 1.08 times width, ML does not extend to atrium apex, atrium extends 0.20 times epigynum length anteriad of ML, ML length 0.38 times epigynal length; lateral lobes narrow, atrium width 7.30 times LL width; copulatory openings beneath the atrial side plate (AtSp) next to ML (Fig. 73 A ), distance between CO 0.35 times width of epigynal plate, CO distance from epigastric furrow 0.64 times epigynum length. Vulva (Figs. 73 A, 81 F ) with spermathecal ducts making three to four, transverse curves, vulva length 0.82 times width, fertilization ducts close-together, vulva width 8.80 times distance between fertilization ducts.   
  Variation. Male  (N = 4): Total length = 11.43–14.29, carapace length / width = 1.38–1.53, carapace height / width = 0.45–0.59, PER / carapace width = 0.38–0.40, PER / OAL = 2.33–3.06, PER / AER = 1.32–1.42, OAL / OQL = 1.00–1.08, OQP / OQA = 1.13–1.28, clypeus height / AME diameter width = 1.26–1.56, cheliceral length / clypeus height = 6.58–8.91, sternum length / width = 1.24–1.31, palpal coxa length / width = 2.07–2.27, femur I length / carapace width = 1.26–1.39, metatarsus I length / carapace width = 1.39–1.55, femur IV length / carapace width = 1.34–1.59, cymbium length / carapace width = 0.63–0.85, cymbium length / palpal patella length = 2.99–3.87, cymbium length / palpal tibia length = 2.70–3.87, cymbium length / palpal femur length = 1.23– 1.61, palpal tibia length / palpal patella length = 1.00–1.11. Female (N = 2): Total length = 11.80– 14.50, carapace length / width = 1.38–1.53, carapace height / width = 0.41–0.67, PER / carapace width = 0.44–0.68, PER / OAL = 2.82–3.56, PER / AER = 1.36–1.44, OAL / OQL = 1.00–1.10, OQP / OQA = 1.17–1.28, clypeus height / AME = 1.26–2.55, cheliceral length / clypeus height = 7.11–8.83, sternum length / width = 1.22–1.32, palpal coxa length / width = 1.89–2.26, femur I length / carapace width = 1.00–1.04, metatarsus I length / carapace width = 0.80–0.82, femur IV length / carapace width = 1.00–1.08, palpal tarsus length / carapace width = 0.49–0.51, palpal tarsus length / palpal patella length = 1.80–1.92, palpal tarsus length / palpal tibia length = 1.60– 1.71, palpal tarsus length / palpal femur length = 0.95–1.09, palpal tibia length / palpal patella length = 1.05–1.17. Genitalia as in Figs. 73 A, B, 81 C, F.   
 M aterial examined. MADAGASCAR: Fianarantsoa Province: 7 km W Ranomafana, ca. 21º12ʹS, 47º27ʹE, elev. 1100m, 22–31 October 1988, W. Steiner (holotype, CASENT9006038, 1♂, USNM), 8-21 October 1988, W. Steiner (CASENT9006037, 1♂, USNM), “island in stream; montane rainforest,” 1–7 November 1988, W. Steiner (CASENT9006036, 1♂, USNM); Parc National de Ranomafana, Vatoharanana, 4.0 km SW Ranomafana (ville), 21°14.7ʹS, 047°26.0ʹE, elev. 1025m, “ pitfalls, slightly transitional lowland to lower montane rainforest”, 3–9 October 2000, S. Goodman [FMNH #00-225], (CASENT9064655, 2♂, FMNH), (CASENT9064664, 1♂, FMNH); Parc National Ranomafana, Talatakely, 21º14.9ʹS, 47º25.6ʹE, “walking on ground”, 11 April 1998, D. Kavanaugh (paratype, CASENT9006035, 1♀, CAS); Talatakely, 21º14.9ʹS, 47º25.6ʹE, elev. ca. 1200m, “under log”, 2 November 1998, V. F. Lee (CASENT9006034, 1♂, CAS); Talatakely, 21º15ʹS, 47º26ʹE, elev. ca. 915–1100m, 30 October–20 November 1998, V. F. Lee and K. Ribardo (CASENT9006033, 1♀, CAS).   
 Natural history. The species Uduba ibonia lives in lowland, premontane and montane rainforest. Collection records suggest that this species may wander; the presence of a calamistrum and a very small cribellum suggests some use of cribellate silk.   
 Distribution. Specimens of Uduba ibonia are known only from the vicinity of Ranomafana National Park in Fianarantsoa Province of southeastern Madagascar (Maps 1, 13).
description: Published as part of 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, pp. 1-193 in Proceedings of the California Academy of Sciences 67 on pages 47-49, DOI: 10.5281/zenodo.13158554