Uduba milamina, 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 : 65-66

Uduba milamina , new species

Figures 76 C, F, I , Maps 8, 15.

Type material. Holotype female ( CASENT9010797 ) collected at the Ranomafana-Radio Tower in Fianarantsoa Province, Madagascar, by R. Harin’Hala from 21–24 December 2001, deposited in CAS . Paratype female ( CASENT9006100 ) collected from soil at 720m elevation in the Andringitra Reserve , Fianarantsoa Province, Madagascar, by Steve Goodman on 19–20 November 1993, deposited in FMNH .

Etymology. The species epithet is from a Malagasy word milamina meaning neat; an adjec tive in apposition.

Diagnosis. Uduba milamina belong to Group I.c, the Uduba funerea group ( Map 15 ) of Group I, the Epigynal atrium group. They are ecribellate, with a colulus; female with epigynal plate with median lobe surrounded by depressed atrium; epigynal plate short or nearly absent posteriad of atrium, height less than 0.12 times epigynal length, median lobe narrow, atrium width greater than three times ML width ( Figs. 76 C, I ). Male unknown.

Description. Male unknown. Female (Holotype): Total length 15.00. Markings typical of

Uduba . Carapace 7.70 long, 4.65 wide, 3.20 high; clypeus 1.10 high. Eye diameters: AME 0.22, ALE and PME 0.26, PLE 0.34. Chelicerae 3.40 long; sternum 3.20 long, 2.30 wide; labium 1.60 long; palpal coxae 2.40 long. With a colulus. Spination: palpus–femur d0-0-1, patella p1-0, tibia p2-0, tarsus p2-1; leg I–femur d1-0-0, p0-0-1, tibia v2-2-2-1, metatarsus v2-2-3; leg II–femur d1- 0-0, p0-0-1, tibia v1-1-1-0, metatarsus v2-2-3; leg III–femur d0-1-0-0, p0-0-1, tibia p0-1-1-0, v1- 1-2, r0-1-1-0, metatarsus p1-2-2, v2-2-2, r1-1-2; leg IV–femur d1-0-0, tibia v1-1-2, r0-1-1-0, metatarsus p0-1-2, v2-1-2-2, r0-2-2. Scopulae: strong ventral beneath tarsi I–IV and metatarsus I and II, on apices of metatarsi III and IV and on apices of tibiae I and II. Leg measurements: I: 5.60 + 2.50 + 4.80 + 4.00 + 2.30 = 19.20; II: 4.60 + 2.30 + 3.90 + 3.70 + 2.10 = 16.60; III: 3.80 + 1.80 + 2.10 + 3.00 + 1.80 = 12.50; IV: 5.10 + 2.10 + 4.30 + 5.00 + 2.30 = 18.80; palpus: 2.70 + 1.30 + 1.40 + NA + 2.50 = 7.90. Leg formula 1423. Female genitalia: epigynal plate with median lobe surrounded by depressed atrium ( Fig. 76 C ), plate width 1.21 times length; atrium sides weakly concave, atrium width 1.48 times atrium length; epigynum length 1.68 times atrium length, atrium width 0.73 times epigynum width, atrium origin at 0.12 times epigynum length from epigastric groove; median lobe narrow ( Fig. 76 C ), wider towards base, atrium width at side of ML 1.27 times ML width; epigynal ML length 2.36 times width, length equal to atrium length, ML extending to apex of atrium, ML 0.62 times epigynal length; lateral lobes narrow, atrium width 9.25 times LL width; copulatory openings beneath median lateral margins of atrium. Vulva ( Fig. 76 F ) with spermathecal ducts making broad, curved copulatory duct and single anterior spiral, vulva length 0.61 times width, fertilization ducts close together, vulva width 4.67 times distance between fertilization ducts.

Variation. (N=2) Total length 15.00–16.00. Ratios –carapace length / width = 1.54–1.66, carapace height / width = 0.57–0.69, PER / carapace width = 0.42–0.46, PER/OAL = 3.23–3.53, PER/AER = 1.39–1.41, OAL/OQL = 1.07–1.20, OQP/ OQA = 1.19–1.26, clypeus height / AME = 2.25–5.00, cheliceral length / clypeus height = 3.09–7.33, sternum length / width = 1.35–1.39, palpal coxa length / width = 2.09–2.18, metatarsus I length / carapace width = 0.83–0.86, femur IV length / carapace width = 1.10–1.11, palpal tarsus length / carapace width = 0.48–0.54, palpal tibia length / palpal patella length = 1.69–1.92, palpal tarsus length / palpal tibia length = 1.57–1.79, palpal tarsus length / palpal femur length = 0.85–0.93, palpal tibia length / palpal patella length = 1.08. Spines beneath the leg tarsi may be absent (holotype, Ranomafana) or present (paratype, Andringitra). Epigynal plate width 1.16–1.21 times length ( Figs. 76 C, I ) epigynum length 1.68– 1.94 times atrium length, atrium origin at 0.10–0.12 times epigynum length from epigastric groove; epigynal median lobe length 2.36–4.75 times width, ML length 1.00–1.19 times atrium length; broad, curved copulatory duct making one or one and a half anterior spirals, vulva length 0.61– 1.20 times width, fertilization ducts close together, vulva width 4.67–5.00 times distance between fertilization ducts ( Figs. 76 C, F, I ).

Material examined. MADAGASCAR: Fianarantsoa Province: Ranomafana Radio Tower , 21°15.05ʹS, 47°24.43ʹE, malaise canopy trap at an open area at the forest edge, 21–24 December 2001, R. Harin’Hala (holotype, CASENT9010797 , 1♀, CAS) ; edge of Andringitra Reserve, ca. 45 km S Ambalavao, on east bank of Iantara River, along Ambalamanenjana-Ambatomboay trail, camp #1, 22°13ʹ20ʺS, 47°01ʹ20ʺE, elev. 720m, from soil, 19–20 November 1993, S. Goodman (paratype, CASENT9006100 , 1♀, FMNH) .

Natural history. The paratype female of Uduba milamina was collected in soil and the female holotype of this ecribellate spider was collected in a malaise canopy trap at an open area at the forest edge, suggesting that this species is terrestrial but may wander in vegetation.

Distribution. Uduba milamina are known from upland eastern forest from central and southern Madagascar (Maps 8, 15).

Figures

FIGURE 76. Uduba spp., female genitalia drawings. A, B. U. barbarae, new species, paratype (CASENT9006064) from Lokobe Forest on the island of Nosy Be. C, F, I. U. milamina, new species. C. Holotype (CASENT9010797) from a malaise canopy trap at the Ranomafana-Radio Tower. F, I. Paratype (CASENT9006100) from Andringitra Reserve. D, E. U. kavanaughi, new species, paratype (CASENT9003517) from Talatakely, Parc National Ranomafana. G, H. U. platnicki, new species, paratype (CASENT9030253) from Mikira Forest. A, C, D. H, I. Epigynum, ventral. B, E, F, G. Vulva, dorsal. Illustrations A, B by Jenny Speckels, C–I by Charles Griswold. At, atrium of epigynum; AtSp, atrial side plate of epigynum; EF, epigastric furrow; LL, lateral lobe of epigynum; ML, median lobe of epigynum. 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.