Tafana riveti, Simon, 1903

De Oliveira, Luiz Fernando M. & Brescovit, Antonio Domingos, 2021, Taxonomic revision and cladistic analysis of ghost spiders of the genus Tafana Simon, 1903 (Araneae: Dionycha, Anyphaenidae), with the descriptions of twelve new species, European Journal of Taxonomy 742, pp. 1-77 : 13-15

The riveti group

Diagnosis

Males of this group resemble those of the silhavyi group by the apophysis at the base of the embolus, but differ by presenting an apophysis at the base of the embolus that is short and conical ( Fig. 12B–C ); the sperm ducts are ‘U-shaped’ in the male palp when it is not expanded ( Figs 9B , 10C ). The females can be recognized by the short atrium, presenting a septum or not, and copulatory ducts narrow ( Figs 10F–G , 11F , 15F–G ).

Included species

Tafana riveti Simon 1903 , T. straminea (L. Koch 1866) , T. quelchi ( Pocock 1895) , T. kunturmarqa sp. nov., T. humahuaca sp. nov., T. pastaza sp. nov., T. nevada sp. nov., T. huatanay sp. nov. and T. ruizi sp. nov.

Figures

Fig. 12. Tafana straminea (L. Koch, 1866), ♂ (MCZ). A. Left palp, ventral view. B. Left palp, ventral view (arrow indicating the base of the embolus). C. Left palp, retrolateral view. Abbreviations: ABE= apophysis of base of the embolus; E =embolus; EP=embolic process; MA=median apophysis; RP= retrolateral projection; ST=subtegulum; T=tegulum; VTP=ventral tegular process. Scale bars: A, C =0.5 mm; B=0.3 mm.

Fig. 9. A, C–D. Tafana silhavyi (Caporiacco, 1955), ♂ (MNHN 11312). A. Left palp unexpanded, ventral view (arrow indicating character). C. Left palp expanded, prolateral view. D. Left palp expanded, retrolateral view (arrow indicating character). B. Tafana riveti (MCZ), ♂, left palp. E–F. Tafana riveti (MCZ), ♂. E. Left palp, retrolateral view. F. Left palp, prolateral view (arrow indicating character). Abbreviations: 1= primary loop of the sperm duct; 2= secondary loop of the sperm duct; ABE=apophysis of base of the embolus; BH =basal haematodocha; C=cymbium; Ch =character; E =embolus; EP=embolic process; F = fundus; MA=median apophysis; MH= median haematodocha; P=petiole; SD = sperm duct; ST =subtegulum; T=tegulum. Scale bars: A–B, E–F =0.25 mm; C–D=0.5 mm.

Fig. 10. Tafana riveti Simon, 1903 (A, C–E =♂, MCZ; B, F–G =♀, MCZ). A. Habitus, dorsal view. B. Habitus, dorsal view. C. Left palp, ventral view (arrow indicating character). D. Left palp, retrolateral view. E. Left palp, dorsal view. F. Epigynum, ventral view. G. Vulva, dorsal view. Abbreviations:A=atrium; Ch =character; CD=copulatory ducts; CO=copulatory opening; E= embolus; FD = fertilization ducts; H = hood; LL =lateral lobes; MA=median apophysis; PA= patellar apophysis; RP = retrolateral projection; RTA=retrolateral tibial apophysis; SD = sperm duct; ST= subtegulum; S1 =primary spermathecae; S2 =secondary spermathecae; T =tegulum. Scale bars: A–B =3.5 mm, C–E, G =0.25 mm, F =0.4 mm.

Fig. 11. Tafana straminea (L. Koch, 1866) (A, C–E=♂, MCZ; B, F–G =♀, IBSP 258181). A. Habitus, dorsal view.B. Habitus, dorsal view. C. Left palp, ventral view (arrow indicating the base of the embolus). D. Left palp, retrolateral view. E. Left palp, dorsal view. F. Epigynum, ventral view (arrow indicating character). G. Vulva, dorsal view.Abbreviations:ABE=apophysis of base of the embolus; CD=copulatory ducts; CO=copulatory opening; E=embolus; EP=embolic process; FD =fertilization ducts; H=hood; LL =lateral lobes; RTA=retrolateral tibial apophysis; S1=primary spermathecae; S2=secondary spermathecae; T =tegulum; VTP=ventral tegular process. Scale bars: A–B=3.5 mm; C–G=0.25 mm.

Fig. 15. Tafana humahuaca sp. nov. (A, C–E =holotype, ♂, MACN-Ar 41787; B, F–G=paratype, ♀, MACN-Ar 41788). A. Habitus, dorsal view. B. Habitus, dorsal view. C. Left palp, ventral view. D. Left palp, retrolateral view. E. Left palp, dorsal view. F. Epigynum, ventral view. G. Vulva, dorsal view. Abbreviations: A= atrium; ABE= apophysis of base of the embolus; CD =copulatory ducts; CO =copulatory opening; E =embolus; FD =fertilization ducts; H =hood; LL= lateral lobes; RTA =retrolateral tibial apophysis; S1= primary spermathecae; S2 =secondary spermathecae; T =tegulum; VTP= ventral tegular process. Scale bars: A–B= 3.5 mm; C–G =0.25 mm.