Diguetia Simon, 1895

Jimenez, Maria-Luisa, Cardiel, Carlos Palacios & Chamé-Vázquez, David, 2022, The spider genus Diguetia Simon, 1895 (Araneae: Diguetidae) in North America a new species, redescriptions, and comments on the distribution of the genus, Zootaxa 5205 (2), pp. 125-146 : 127

Genus: Diguetia Simon, 1895

Type species. Segestria canities McCook, 1890

Emended diagnosis. After Gertsch (1958), Brignoli (1974), Platnick (1989), Grismado & Ramírez (2014). Members of Diguetia resemble those of Segestrioides by the diamond-shaped endites, females with two lateral pore plates and males with wide, flattened laminate embolus, but Diguetia can be distinguished by the presence of thick white setae on the prosoma and opisthosoma ( Figs 1–8 , 25 , 30–37 , 53 , 56–63 , 67–74 , 85–92 , 103–104 ; absent in Segestrioides ); opisthosoma usually with a middle basal band which continue caudally as two narrow scalloped bands, different pattern in Segestrioides , and the capsulated tarsal organ ( Fig. 23 ; while in Segestrioides it is a typical flattened plate bearing concentric rings). Furthermore, the gonopore in Diguetia is wider than in Segestrioides but it is not situated on a protuberance; the male palpal bulb of Diguetia has a narrow tubular prong associated with the spoonshaped embolus ( Figs 11–17 , 40–46 , 64–65 , 77–82 , 95–100 ; absent in Segestrioides ). The females have a single longitudinal oriented membranous median sac ( Figs 10 , 18–19 , 39 , 47–48 , 76 , 94 ) of unknown function, although Brignoli (1974: 258) refers it as single medial spermatheca; such structure is absent in Segestrioides . Moreover, Diguetia species spin extensive aerial webs in shrubs and cacti with vertical retreats, whereas Segestrioides species dwell under rocks ( Platnick 1989).

Composition. Diguetia albolineata (O. Pickard-Cambridge, 1895) , D. andersoni Gertsch, 1958 , D. balandra sp. nov., D. canities ( McCook, 1890) , D. dialectica Chamberlin, 1924 stat. reval., D. catamarquensis ( Mello-Leitão, 1941) , D. imperiosa Gertsch & Mulaik, 1940 , D. mojavea Gertsch, 1958 , D. propinqua (O. Pickard-Cambridge, 1896) , D. signata Gertsch, 1958 , D. stridulans Chamberlin, 1924 .

Distribution. Primarily Southwestern United States to North and Central Mexico, and from Argentina ( Ubick et al. 2017).

Remarks. We emend the generic diagnosis based on the copulatory organs of D. balandra sp. nov., D. canities , D. dialectica stat. reval., D. signata , D. imperiosa , and D. catamarquensis .

Figures

FIGURES 1–10. Diguetia balandra sp. nov. 1, 2, male habitus, dorsal; 3, 4, same, ventral; 5, 6, female habitus, dorsal; 7, 8, same, ventral; 9, female genitalia, ventral; 10, same, dorsal. Scale bars 1–8: 0.50 mm; 9–10: 0.20 mm.

FIGURES 17–29. Diguetia balandra sp. nov. 17, male palp, dorso-lateral; 18, female genitalia, ventral; 19, detail of lateral pore plates, dorso-lateral; 20, female stridulating file of chelicerae, lateral; 21, male metatarsal lyriform organ; 22, female tarsal slit sensilla; 23, female, tarsal organ of leg I; 24, metatarsus IV of female, lateral; 25, live male specimen; 26, retreat in situ; 27, web in situ; 28, male leg IV, prolateral; 29, female leg IV, prolateral. Scale bars 28–29: 0.50 mm

FIGURES 30–39. Diguetia dialectica stat. reval. 30, 31, male habitus, dorsal; 32, 33, same, ventral; 34, 35, female habitus, dorsal; 36, 37, same, ventral; 38, female genitalia, ventral; 39, same, dorsal. Scale bars 30–37: 0.50 mm; 38–39: 0.20 mm.

FIGURES 46–55. Diguetia dialectica stat. reval. 46, male palp, dorso-lateral; 47, female genitalia, ventral; 48, detail of lateral pore plates, dorso-lateral; 49, female metatarsal lyriform organ; 50, tarsal organ and sensilla of male leg I, dorsal; 51, web in situ; 52, retreat in situ; 53, live female specimen; 54, male leg IV, prolateral; 55, female leg IV, prolateral. Scale bars 54–55: 0.50 mm.

FIGURES 56–66. Diguetia dialectica stat. reval., 56–58 female holotype, 59–66 specimens studied by Gertsch (1958: 13– 14). 56, 59, female habitus, dorsal; 57, 60, same, ventral; 58, 66, female genitalia, ventral (inset specimens labels); 61, male habitus, lateral; 62, same, dorsal; 63, same, ventral; 64, male palp, slightly off views “prolateral”; 65, same, slightly off views “retrolateral”. Scale bars 56–63, 66: 0.50 mm; 64–65: 0.20 mm. Note: Figs 56–58 (including label) by the California Academy of Sciences used under CC BY-NC-SA 4.0; 64–65 by Museum of Comparative Zoology, Harvard University.

FIGURES 67–76. Diguetia signata. 67, 68, male habitus, dorsal; 69, 70, same, ventral; 71, 72, female habitus, dorsal; 73, 74, same, ventral; 75, female genitalia, ventral; 76, same, dorsal. Scale bars 67–74: 0.50 mm; 74–76: 0.20 mm.

FIGURES 85–94. Diguetia imperiosa. 85, 86, male habitus, dorsal; 87, 88, same, ventral; 89, 90, female habitus, dorsal; 91, 92, same, ventral; 93, female genitalia, ventral; 94, same, dorsal. Scale bars 85–92: 0.50 mm; 93–94: 0.20 mm.

FIGURES 103–108. 103–105. Diguetia imperiosa. 103, live female specimen; 104, live male specimen; 105 web in situ; 106–108. Diguetia habitats. 106, Habitat of D. balandra sp. nov. at Balandra Beach, Baja California Sur, Mexico; 107, Habitat of D. dialectica stat. reval. at Sierra La Gata, Baja California Sur, Mexico; 108, Habitat of D. dialectica stat. reval. and D. imperiosa at San Basilio, Baja California Sur, Mexico.

FIGURES 11–16. Diguetia balandra sp. nov. 11, male palp (arrow pointing stridulating pins), prolateral; 12, same, retrolateral; 13, same (arrow pointing stridulating pins), dorsal; 14, same, slightly off views “prolateral”; 15, same, slightly off views “retrolateral”; 16, cleared male palp, dorsal. Scale bars 11–16: 0.20 mm.

FIGURES 40–45. Diguetia dialectica stat. reval. 40, male palp (black arrow pointing stridulating pins), prolateral; 41, same, retrolateral; 42, same (blue arrow pointing bulged part of bulb), dorsal; 43, same, slightly off views “prolateral”; 44, same, slightly off views “retrolateral”; 45, cleared male palp (arrow pointing bulged part of bulb), dorsal. Scale bars 40–45: 0.20 mm.

FIGURES 77–84. Diguetia signata. 77, male palp (black arrow pointing stridulating pins, and blue arrow pointing bulged part of bulb), prolateral; 78, same, retrolateral; 79, same, dorsal (red arrow pointing bulged part of bulb); 80, same, slightly off views “prolateral”; 81, same, slightly off views “retrolateral”; 82, cleared male palp, dorsal; 83, male leg IV, prolateral; 84, female leg IV, prolateral. Scale bars 77–82: 0.20 mm, 83–84: 0.50 mm.

FIGURES 95–102. Diguetia imperiosa. 95, male palp (black arrow pointing stridulating pins), prolateral; 96, same, retrolateral; 97, same, dorsal (red arrow pointing femoral groove); 98, same, slightly off views “prolateral”; 99, same, slightly off views “retrolateral”; 100, cleared male palp, dorsal; 101, male leg IV, prolateral; 102, female leg IV, prolateral. Scale bars 95–100: 0.20 mm, 101–102: 0.50 mm.