Aamunops yiselae, Sánchez-Ruiz & Bonaldo, 2024

Sánchez-Ruiz, Alexander & Bonaldo, Alexandre B., 2024, Updating the morphological phylogenetics of Nopinae (Araneae: Caponiidae): novel terminals and characters, with two new species, European Journal of Taxonomy 930 (1), pp. 182-204 : 193-201

Aamunops yiselae sp. nov.

urn:lsid:zoobank.org:act:16C669C8-4F61-4D28-B800-E48B669E1C25

Figs 3–4 , 5A , 6–13

Diagnosis

The males of A. yiselae sp. nov. resemble those of A. noono and A. hoof sp. nov. by having a short embolus, shorter than the palpal tibia, but can be distinguished by a slender and sinuous embolus tip, without denticles and with a longer and thin hyaline process ( Figs 3H , 5A ). Females can be distinguished from those of the other species with a T-shaped sclerotized bifid duct on the anteromedian receptacle base by having it with a convex anterior margin ( Fig. 6D ) (vs concave anterior margin in other species).

Etymology

The specific name is a patronym honoring Yisel Krauss, the sister of the first author.

Type material

Holotype MEXICO • ♂; Oaxaca, 1 km S San Lorenzo Mixtepec ; 16.17493° N, 96.20910° W; 2120 m a.s.l.; 23 Jun. 2006; O. Francke, G. Villegas, H. Montaño, A. Valdez and C. Santibañez leg.; CNAN-Ar 6948 .

Paratypes MEXICO • 2 ♀♀; same collection data as for holotype; CNAN-Ar 6945 .

Description

Male (holotype)

Carapace orange ( Fig. 3C ). Chelicerae, palps, endites, labium, sternum and legs light orange; coxae and trochanters lighter. Abdomen pale gray, with dorsal dark gray chevron pattern as in Fig. 3A ; ventral part pale gray without stains ( Fig. 3B ). Anal tubercle and spinnerets lighter than abdomen. Crista short, covering little more than half of metatarsus I, covering less than half of metatarsus II. Total length 3.9. Carapace 1.8 long, 1.3 wide. Sternum 1.6 long, 1.2 wide. Leg measurements: I: 5.3; II: 5.0; III: 4.7; IV: 5.5. Tegulum globose, spherical; embolus short, length not reaching palpal tibia length, with wide base and narrow tip that looks like triangle in lateral view, with slender and sinuous embolus tip, without denticles and with long and thin hyaline process ( Figs 3H , 5A ).

Female (paratype)

Carapace, chelicerae, palps, endites, labium, sternum, coxae, legs, abdomen, anal tubercle and spinnerets as in male ( Fig. 4A–D ). Crista covering all ventral part of metatarsi. Total length 4.2. Carapace 2.0 long, 1.5 wide. Sternum 1.9 long, 1.5 wide. Leg measurements: I: 5.4; II: 5.2; III: 4.9; IV: 5.6. External genital area with strongly sclerotized ess ( Fig. 6A ). Internal genitalia with T-shaped sclerotized bifid duct on anteromedian receptacle base and convex anterior margin ( Fig. 6D ); sac-like membranous structure long and wide ( Figs 6B , 11E–F ); membranous posterior receptacle covering pair of horizontal sclerotized bars communicating with sclerotized bifid duct on anteromedian receptacle base ( Figs 6D , 11E–F ).

Distribution

Known only from the type locality in Mexico ( Fig. 13 ).

Figures

Fig. 3. Aamunops yiselae sp. nov., holotype, ♂ (CNAN-Ar 6948). A. Habitus, dorsal view. B. Habitus, ventral view.C. Carapace, dorsal view. D. Sternum and mouth parts, ventral view. E. Right leg I, prolateral view. F. Right leg III, prolateral view. G. Right leg IV, prolateral view, arrows show the adesmatic joints. H. Left palp, in square a detail of the embolus tip, prolateral view. I. Left palp, ventral view. J. Left palp, retrolateral view. Scale bars = 0.5 mm.

Fig. 4. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945). A. Habitus, dorsal view. B. Habitus, ventral view.C. Carapace, dorsal view. D. Sternum and mouth parts, ventral view. E. Left palp, prolateral view. F. Left palp, retrolateral view. G. External genital area, ventral view. H. Right tarsus and metatarsus IV, prolateral view, arrows show the adesmatic joints. I. Left tarsus and metatarsus IV, retrolateral view, arrows show the adesmatic joints. Abbreviations: see Material and methods. Scale bars: A‒B = 1 mm; C‒G = 0.5 mm; H‒I = 0.2 mm.

Fig. 5. Drawings of the embolus tip, prolateral view. A. Aamunops yiselae sp. nov., B. Aamunops hoof sp. nov. Abbreviations: see Material and methods. Scale bars = 0.1 mm.

Fig. 6. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945). A. External genital area, ventral view. B. Internal genitalia, dorsal view. C. Detail of anteromedian receptaculum base, dorsal view. D. Same, posterior view. Abbreviations: see Material and methods. Scale bars: A‒B = 0.5 mm, C‒D = 0.2 mm.

Fig. 7. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945), chelicerae. A. Anterior view.B. Ventral view. C. Ectal side showing stridulatory ridges. D. Right fang, ventral view. E. Detail of left fang base, anterior view. F. Detail of right fang base, anterior view. Abbreviations: see Material and methods.

Fig. 8. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945), left leg I, retrolateral view. A. Full leg. B. Femur.C. Metatarsus and tarsus. D. Gladius on joint of metatarsus and tarsus. E. Tarsus.F. Metatarsus. Abbreviations: see Material and methods.

Fig. 9. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945), left leg IV. A. femur, metatarsus and tarsus, prolateral view. B. Tarsus, prolateral view. C. Detail of joint metatarsus and tarsus, prolateral oblique view. D. Tarsus, dorsal view. E. Metatarsus, arrow points adesmatic joint, prolateral oblique view. F. Detail of adesmatic joint on metatarsus, prolateral oblique view. Abbreviations: see Material and methods.

Fig. 10. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945). A. Left pretarsus I, retrolateral view. B. Left tarsus I, retrolateral view. C. Trichobothrium on left metatarsus I, dorsal oblique view. D. Detail trichobothrium base on left tarsus I, dorsal oblique view. E. Tarsal organ, dorsal view. F. Ventral frictional setae on left pretarsus I, retrolateral oblique view. Abbreviations: see Material and methods.

Fig. 11. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945). A. Left pretarsus IV, prolateral view. B. Left pretarsus IV, anterior view. C. Presumed slit sensilla on left tarsus IV, dorsal view. D. Tarsal organ, dorsal view. E. Internal genitalia, ventral view. F. Same, posterior view. Abbreviations: see Material and methods.

Fig. 12. Aamunops yiselae sp. nov., paratype, ♀ (CNAN-Ar 6945), spinnerets, posterior view. A. Spinning field. B. Left ALS and PMS. C. Right ALS and PMS. D. Right PMS. E. Detail of presumed minor ampullated gland spigot on PMS.F. Detail of aciniform gland spigot on AMS.Abbreviations: see Material and methods.

Fig. 13. Distribution map of species of Aamunops Galán-Sánchez & Álvarez-Padilla, 2022. Aamunops chimpa Galán-Sánchez & Álvarez-Padilla (black square), A. hoof sp. nov. (triangle), A. misi Galán- Sánchez & Álvarez-Padilla (white stars), A. noono Galán-Sánchez & Álvarez-Padilla (white square), A. yiselae sp. nov. (circle) and A. olmeca Galán-Sánchez & Álvarez-Padilla (black star).