Longistylus, Indicatti, Rafael Prezzi & Lucas, Sylvia Marlene, 2005

Indicatti, Rafael Prezzi & Lucas, Sylvia Marlene, 2005, Description of a new genus of Nemesiidae (Araneae, Mygalomorphae) from the Brazilian Cerrado, Zootaxa 1088, pp. 11-16 : 12

Longistylus n. gen.

( Figs. 1–18 )

Type­species: L. ygapema n. sp.

Diagnosis. Longistylus n. gen. resembles Teyl Main by the very long, styliform embolus of the male palpal bulb, but differs by the reflexed embolus at least twice as long as the palpal tibia ( Figs. 1–3 ) (in Teyl never longer than tibia), and by the pseudosegmented tarsi ( Figs. 13–15 ). It is distinguished from the ramaining Anaminae genera by the triangular apical segment of PLS ( Fig. 7 ) and by the absence of megaspine on male tibia I and II ( Fig. 12 ).

Etymology. The generic name refers to the very long embolus of the male palp (from the Latin: long + stylus, pointed tip). Gender is male.

Description. See description of the type­species.

Figures

FIGURES 1 – 3. Longistylus ygapema n. sp. 1 – 3. Left male palpal bulb. 1, Prolateral view; 2, Dorsal view; 3, Retrolateral view. Scale bars = 1 mm.

FIGURES 4 – 10. Longistylus ygapema n. sp. 4 – 10. 4, Male body, dorsal view; 5, Cephalothorax, dorsal view; 6, Abdomen, ventral view; 7, Lateral view; 8, Ventral view; 9, Lateral view, showing color variation; 10, Dorsal view, showing color variation. Scale bars = 2 mm. Photos: R. P. Indicatti.

FIGURES 11 – 18. Longistylus ygapema n. sp. 11 – 18. 11, Male sternum, endites and ratellum. 12, Tibia I, retrolateral view; 13, Tarsus IV pseudosgmentation, lateral view; 14, Tarsus IV pseudosegmentation, variation, lateral view; 15, Tarsus IV pseudosegmentation, variation, lateral view; 16, Male palpal bulb, prolateral view; 17, Retrolateral view; 18, Ventral view. Scale bars = 2 mm. Photos: R. P. Indicatti.