Uduba lamba, 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 : 58-59

Uduba lamba , new species

Figures 9 H , 26 C , 49 A–C , Maps 12, 13.

Type material. Holotype male ( CASENT9042542 ) from rainforest at 525m elevation, Réserve Nationale Intégrale Betampona , 17°55ʹ11ʺS, 049°12ʹ01ʺE, Toamasina Province, Madagascar, collected 25 May–1 June 2008 by B. L. Fisher, deposited in CAS . Paratype male ( CASENT9042359 ), same data, also deposited in CAS .

Etymology. The species epithet, lamba, refers to a traditional garment worn by men and women in Madagascar; a noun in apposition.

Diagnosis. Uduba lamba are members of Group I.a, the Uduba dahli group ( Map 13 ) of Group I, the Epigynal atrium group. They are ecribellate, with a colulus ( Fig. 26 C ). Males have the TA3 with a small, screw-shaped apex, TA2 erect, truncate, apex a sharp point, with a large, complex MA, concave in center with strong marginal ridge with a transverse ventral lobe or with ventral point to prolateral ( Figs. 49 A–C ); distinguished from Uduba fandroana and U. hainteny by having the MA relatively large, with pronounced ventral projection ( Figs. 49 A–C ): in Uduba fandroana ( Figs. 39 A–C ) and U. hainteny ( Figs. 42 A–C ) the MA is relatively small, width less than 0.35 tegulum width, height less than 0.25 tegulum height and without prominent projections. Female unknown.

Description. Male (holotype): Total length 12.50. Markings as in Fig. 9 H . Carapace 8.60 long, 5.70 wide, 2.80 high; clypeus 0.40 high. Eye diameters:AME and ALE 0.26, PME 0.28, PLE 0.36. Chelicerae 3.40 long; sternum 3.50 long, 2.80 wide; labium 2.20 long; palpal coxae 2.70 long. With a colulus ( Fig. 26 C ). Spination (holotype): palpus–femur d0-0-1, p0-0-1, r0-0-1; leg I–femur d1-1-1, p0-0-2, r0-0-1, tibia p0-1-1-0, v2-2-2-2, r0-1-0-0, metatarsus p1-1-0, v2-2-3, r1-1-0; leg II– femur d1-1-1, p0-1-1, r0-1-0-1, tibia d0-1-1-0, 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, r0-1-1-1, tibia d0-1-0, p0-1-1-0, v2-2-2, r0-1-1-0, metatarsus p1-1-1-2, v2-2-2, r1-1-2; leg IV–femur d1-1-0-1, p0-1-0-1, r0-0-0-1, tibia v2[segments missing from both sides]. Scopulae: cymbium, apicodorsal; weak beneath tarsi and apices of all metatarsi. Leg measurements (paratype, CASENT9042359): I: 8.50 + 3.30 + 8.20 + 9.00 + 4.60 = 33.60; II: 7.20 + 2.70 + 6.70 + 7.20 + 3.90 = 27.70; III: 6.00 + 3.40 + 4.00 + 6.30 + 3.20 = 22.90; IV [metatarsus and tarsus are missing, so their lengths and leg IV total length have been estimat- ed]: 8.40 + 3.60 + 7.10 + 9.14 + 4.03 = 32.27; palpus: 3.20 + 1.20 + 1.40 + NA + 4.00 = 9.80. Leg formula 1423. Male palp (holotype, Figs. 49 A–C ): palpal tibia 0.40 times cymbial length, RTA short, triangular, with blunt apex ( Fig. 49 C ), RTA length 0.78 times width, RTA length 0.21 times tibia length; VTA slender, nearly cylindrical ( Fig. 49 A ), length 1.71 times width, length 0.40 times tibia width; tibia lacks stout spines; tegulum convex, without ridge but with retrolateral concavity ( Fig. 49 B ), tegulum length 1.08 times width; TA1 extends distad of tegulum apex, TA1 extends past TA3 apex by 1.36 times tegulum length; TA3 with a small, screw-shaped apex, TA3 even with TA2 apex, TA2 erect, truncate with apex a sharp point ( Fig. 49 B ); MA large, complex, length 0.31 tegulum length, width 0.435 tegulum width, MA origin at 0.36 tegulum length, tegulum apex at 0.48 tegulum length from tegulum apex, length (including apical processes) 0.76 times width ( Figs. 49 A–C ), MA with transverse ventral lobe; conductor fan concave or entire. Female unknown.

Variation. Male (N = 2) Total length = 12.50–14.29, carapace length / width = 1.40–1.51, carapace height / width = 0.41–0.49, PER / carapace width = 0.37–0.39, PER / OAL = 2.33–2.76, PER / AER = 1.33–1.37, OAL / OQL = 1.04–1.12, OQP / OQA = 1.05–1.08, clypeus height / AME = 1.25–1.54, cheliceral length / clypeus height = 8.50–9.00, palpal coxa length / width = 2.45–2.70, femur I length / carapace width = 1.37–1.47, metatarsus I length / carapace width = 1.44–1.55, femur IV length / carapace width = 1.45–1.46, cymbium length / carapace width = 0.63–0.69, cymbium length / palpal patella length = 3.27–3.33, cymbium length / palpal tibia length = 2.86–3.00, cymbium length / palpal femur length = 1.20–1.25, palpal tibia length / palpal patella length = 1.09–1.17. Female variation unknown.

M aterial examined. MADAGASCAR: Antsiranana Province: 6.5 km SSW Befingotra, Rés. Anjanaharibe-Sud , 14º45ʹS; 49º30ʹE, elev. 875m, rainforest, 19 October 1994, B. L. Fisher [BLF1076] ( CASENT9006020 , 1♂, CAS) . Fianarantsoa Province: Réserve Nationale Intégrale Andringitra, Anjavidilay, 8.5 km SE Atanifotsy, 22°09.5ʹS, 46°57.6ʹE, elev. 1990m, pitfall trap in Philippia -dominated sclerophyllus forest, 5–11 March 1997, S. E. Goodman ( CASENT9064649 , 2♂, FMNH) . Toamasina Province: Réserve Nationale Intégrale Betampona , 35.1 km NW Toamasina, 17°55ʹ11ʺS, 049°12ʹ01ʺE, elev. 525m, rainforest, malaise trap, 25 May–1 June 2008, coll. B. L. Fisher [BLF19594_23] (Holotype, CASENT9052542 , 1♂, CAS) , (paratype, CASENT9042359 , 1♂, CAS) .

Natural history. Collection records document the occurrence of Uduba lamba in Philippia dominated sclerophyllus forest in far southern Madagascar and in rainforest at scattered localities in eastern Madagascar. They make no use of cribellate silk.

Distribution. The few records suggest that the species Uduba lamba may be widespread in eastern Madagascar (Maps 12, 13).

Figures

FIGURE 9. Habitus photos of Uduba spp., males, dorsal views. A. U. schlingeri, (CASENT9006077) from R. S. de Ivohibe. B. U. woodae, CASENT9017831 from Lake Ranobe. C. U. lehibekokoa, Holotype (CASENT9017929) from tropical dry forest in Parc National de Namoroka. D. U. salegy, Holotype (CASENT9006044) from montane rainforest in Parc National Montagne d’Ambre. E. U. ibonia, CASENT9006034 from Parc National Ranomafana. F. U. fandroana, CASENT9006103 from Forêt d’Ankazomivady. G. U. kavanaughi, Holotype (CASENT9029870) from evergreen forest in Parc National Ranomafana. H. U. lamba, Holotype (CASENT9042542) from rainforest in Réserve Nationale Intégrale Betampona. Scale bars: A–F, H = 5 mm, G = 10 mm.

FIGURE 26. Spinning organs of Uduba spp. A. B. U. schlingeri ♀, (CASENT9006075), Vatoharanana, Parc Nacional Ranomafana. C. U. lamba, ♂, holotype, (CASENT9042542), R.N.I. Betampona. Cl, colulus, Cr, cribellum. Scale bars: A, B = 0.5 mm, C = 2.0 mm.

FIGURE 49. Uduba lamba, new species, Holotype (CASENT9052542) from Réserve National Intégrale Betampona, left male palpus. A. Prolateral. B. Ventral. C. Retrolateral. Arrow to retrolateral notch in tegulum. Arrow to bump on tegulum. Illustrations by Rachel Diaz-Bastin. MA, median apophysis; TA2, proapical apophysis of the tegulum; TA3, retroapical apophysis of the tegulum. Scale bar = 0.5 mm.

MAP 13. Distribution of Group I.a, the Uduba dahli MAP 14. Distribution of Group I.b, the Uduba woodae group of Group I, the Epigynal atrium group: Uduba group of Group I, the Epigynal atrium group: Uduba lamba, U. fandroana, U. hainteny, U. kavanaughi, U. plat- andriamihajai, U. balsama, U. schlingeri, U. taralily, nicki, U. halabe, U. salegy, U. dahli Simon 1903 and U. lehibekokoa and U. woodae. U. ibonia.

FIGURE 39. Uduba fandroana, new species, Holotype (CASENT9002691) from Anjozorobe, left male palpus. A. Prolateral. B. Ventral. C. Retrolateral. Illustrations by Daniele Polotow. C, conductor; Cm, cymbium; Eb, embolar base; MA, median apophysis; Pt, petiole of subtegulum; RTA, retrolateral tibial apophysis on male palp; ST, subtegulum; T, tegulum; TA1, proapical apophysis of the tegulum; TA2, proapical apophysis of the tegulum, arising just prolaterad of distal notch; TA3, retroapical apophysis of the tegulum; UTA, basal tibial apophysis on male palp, which is located at proximoventral margin of tibia extending above patellar intersegmental membrane; VTA, ventral tibial apophysis on male palp, typically arising at midsegment. Scale bar = 1.0 mm.

FIGURE 42. Uduba hainteny, new species, Holotype (CASENT9032857) from Forêt Ivohibe, left male palpus. A. Prolateral. B. Ventral. C. Retrolateral. Illustrations by Charles Griswold. Scale bar = 0.5 mm.