Porteria torobayo, Morrill & Crews & Esposito & Ramírez & Griswold, 2023

Morrill, Elizabeth, Crews, Sarah, Esposito, Lauren, Ramírez, Martín J. & Griswold, Charles, 2023, A revision of the genus Porteria and the phylogeny and biogeography of Porteriinae (Araneae: Desidae), Zoological Journal of the Linnean Society 198 (2), pp. 368-461 : 432-433

PORTERIA TOROBAYO SP. NOV.

FIGS 54–56

Zoobank registration: urn: lsid: zoobank. org:act: 5187160A-D4AE-4BC2-A1A3-E15721B925F4.

Types: Holotype male and paratype female from Chile, XIV Región de Los Ríos, Valdivia Province: Rincón de la Piedra , turn-off 14.8 km SE Valdivia, elev. 50 m, S39º55.32’, W73º06.27’, 11 January - 2 February 1997 ‘disturbed Valdivian rainforest with Nothofagus dombeyi , Podocarpus salignus , flight intercept trap’, A. Newton and M. Thayer, deposited in AMNH.

Etymology: Named after the locality Torobayo in Valdivia, near where this species was collected. A noun in apposition.

Diagnosis: Males can be distinguished from others in the bunnyana group by the finger-like DTA of uniform width projected retrolaterally in dorsal view ( Figs 55C, D , 56D ) and the slender embolus base ( Figs 55B, C , 56B ). Females can be distinguished from P. faberi ( Figs 50F, G , 53A, C, D ) by the rectangular shaped atrium ( Fig. 55E ), the ‘M’-shaped atrium ventral wall and the close proximity of spermatheca stalks ( Fig. 55G ).

Description: Male: based on FMHD 97–18. Specimen faded but with white anterolateral lines on dorsum of abdomen along with three or four pairs of white medial spots ( Fig. 54A ). Total length 5.56. Carapace length 1.39 times width. Clypeus height 1.71 times AME diameter. ALE diameter 1.43 times AME diameter. Chelicera length 7.83 times clypeus height. Sternum as long as wide. Femur I 1.32 times carapace length. Leg formula 4123. Cymbium length 3.93 times length of bulb. Cheliceral promargin with five teeth and one denticle. Leg spination as follows: palp: femur d1-1- 3, patella d1-1, tibia d0-1-0, p1-0-0, tarsus d0-1(p)-0, r0-0-1; leg I: femur d1-1(p)-1(r)-1-2-2, p0-0-1-0, patella d1-1, tibia d1(r)-0-0, p0-1-1-1-0, v2-2-2, metatarsus p0-0-1, r0-0-1, v2-2-1; leg II: femur d3-2(p)-1(r)-1-2-2, patella d1-1, tibia d1(r)-0-0, p0-1-1-0, r0-1-1-0, v2-2- 2, metatarsus d0-0-1, p0-0-1, r0-1-1, v2-2-2; leg III: femur d3-3-2-2, patella d1-1, tibia d1(r)-0-1-0, p0-1-1-0, r0-1-1-0, v2-2-2, metatarsus d2-0-2, p0-1- 1, r0-1-1, v2-2-1, tarsus r0-1, v0-0-2; leg IV: femur d2-2-2-1(r)-2, patella d1-1, tibia d1(r)-0-1-0, p0-1-1-0, r0-1-1-0, v2-2-2, metatarsus d2-2-1, p0-0-1, r0-1-1-1, v2-2-2, tarsus r0-1, v0-1-3. Palp as in Figure 55 A-D with four tibial apophyses: LRTA bent, projecting out of frontal plane, VTA darkly sclerotized mound, RTA long attenuate, unlike P. alopobre , which has a more differentiated tooth on anterior surface of base (see Fig. 58 ). DTA finger like with uniform width ( Fig. 55C, D ), stouter than in P. ariasbohartae , projected more retrolaterally than that of P. alopobre smaller and more slender. Paracymbium present ( Fig. 56B ), larger than that of ariasbohartae . Embolus base narrow and elongate, less than half the width of bulb ( Fig. 56B ); embolus tip of medium length tapering to narrow needle-like tip curving to meet apex of conductor ( Fig. 56A ). Conductor straight, dividing bulb in half and twisting tightly distally. Large tegular concavity ( Fig. 56B, C ).

Leg measurements (right): leg I 14.45 (3.75, 4.8, 3.65, 2.25); leg II 12.45 (3.40, 3.95, 3.25, 1.85); leg III 11.30 (3.05, 3.35, 3.30, 1.60); leg IV 14.75 (3.75, 4.35, 4.55, 2.10); palp 7.40 (2.55, 2.10, –, 2.75).

Description: Female: based on paratype. Specimen faded with mis-shapen abdomen and no distinct markings, dark brown; sternum with light median patch surrounded by dark brown ( Fig. 54 B-D). Total length 5.83. Carapace length 1.37 times width. Clypeus height 2.33 times AME diameter. ALE diameter 1.67 times AME diameter. Chelicera length 5.79 times clypeus height. Sternum as long as wide. Femur I 1.12 times carapace length. Leg formula 4123. Cheliceral promargin with five teeth and one denticle. Leg spination as follows: palp: femur d1-1-3, patella d1-1, tibia d1-1, p1-0, tarsus d2-0, p1-1-1, r0-1-1, v1-2-2; leg I: femur d1-2-1(p)-2, patella d1-1, tibia d1(r)-0-0, p0-0- 1-0, v2-2-2, metatarsus p0-1-1, r0-0-1, v2-2-1; leg II: femur d1-3-2-2, patella d1-1, tibia d1(r)-0-0, p0-1-1-0, r0-0-1-0, v2-2-2, metatarsus p0-1-1, r0-1-1, v2-2-3; leg III: femur d3-1(p)-3-2-2, patella d1-1, tibia d1(r)-0-1-0, p0-1-1-0, r0-1-1-0, v2-1(p)-2, metatarsus d2-0-1, p0-1- 1, r0-1-1, v2-2-3, tarsus r0-1, v0-2; leg IV: femur d1-1- 2-2, patella d1-1, tibia d1(r)-1-0, p0-1-1-0, r0-1-1-0, v2-1(r)-2, metatarsus d2-1(r)-1, p0-1-1, r0-1-1, v1-1-2, tarsus r0-1, v0-1-2. Epigyne as in Figure 55 E-G, closely resembling P. faberi , copulatory openings sunken into atrium, atrium with anterior hood. Margins and hood straight, forming rectangular atrium, side margins and hood with more pronounced curves in P. faberi . Median septum receding into atrium in torobayo , in P. faberi fleshy septum recedes under hood, tapering

Figures

Figure 50. Genitalia of P. faberi sp. nov. A, from Reserva Costera Valdiviana, CASENT9036439. B-E, from Valdivia, CASENT9044656. A, retrolateral view. B, ventral view. C, detail, retrolateral view. D, prolateral view. E, tibia, detail, dorsal view. F-H, female from Reserva Costera Valdiviana, CASENT9055712. F, ventral view showing long setae covering epigynum. G, ventral view with setae shaved. H, dorsal view showing internal structures.

Figure 53. Scanning electron micrographs of epigyna of P. faberi sp. nov. showing variation. A, B, C, from Reserva Costera Valdivia, CASENT9055712. D, E, from Coquimbo, CASENT9044710. A, C, D, ventral view; note small to minute median scape. B, E dorsal view.

Figure 54. Habitus of P. torobayo sp. nov. from Valdivia, FMHD97-18. A, male holotype. B-D female paratype. A, B, dorsal views. C, ventral view. D, lateral view. Scale bars = 1 mm.

Figure 55. Genitalia of P. torobayo sp. nov. A-D, left palp, male holotype, FMHD97-18. A, retrolateral view. B, ventral view. C, prolateral view. D, detail, dorsal view. E-G, female paratype, FMND97-18. E, ventral view. F, dorsolateral view showing Bennett’s gland pore. G, dorsal view.

Figure 56. Left male palp of P. torobayo sp. nov. holotype male from Rincón de la Piedra, Valdivia Province. A, prolateral view. B, ventral view. C, retrolateral view. D, dorsal view. Illustration by Rachel Diaz-Bastin.

Figure 58. Left male palp of P. alopobre sp. nov. holotype from Osorno, CASENT9044647.A, prolateral view. B, ventral view. C, retrolateral view. D, dorsal view. Scale bars = 0.5 mm.