Mesabolivar rudilapsi, Machado, Éwerton O., Brescovit, Antonio D. & Francisco, Rafael C., 2007

Machado, Éwerton O., Brescovit, Antonio D. & Francisco, Rafael C., 2007, Three new ground dweller Mesabolivar González-Sponga, 1998 (Araneae: Pholcidae) from Blumenau, Santa Catarina, Brazil, Zootaxa 1560, pp. 55-61 : 57-59

Mesabolivar rudilapsi n. sp.

( Figs. 12–18 )

Types. Male holotype from Parque Natural Municipal Nascentes do Ribeirão Garcia (27o01’– 27o06’ S; 49o04’– 49o10’ W; 290–910 m), Blumenau, Santa Catarina, Brazil, 24.X.2004, R.C. Francisco col. with pitfall traps, deposited in IBSP 62448.

Etymology. The species is named in honour of the Brazilian ornithologist Rudi Ricardo Laps, from “Universidade Regional de Blumenau”.

Diagnosis. This species can be distinguished from the congeneric species by the presence of two pairs of medium-sized apophyses on the chelicerae, in an unique position ( Figs. 12–14 ) and by the slender procursus with several ventral ridges ( Figs. 15–16 ).

Description. Male (Holotype): Total length 2.4, carapace width 1.3; leg I: 37.9 (9.3 + 0.4 + 9.9 + 16.1 + 2.7), tibia II: 6.2, tibia III: 4.1, tibia IV: 6.4, tibia I L/d: 71. Carapace light brown; sternum light ochre. Distinct thoracic groove. Eight eyes on slightly elevated ocular area; distance PME–ALE about 60% of PME diameter. Chelicera uniformly light brown, basal segment of chelicera with one ventro-prolateral median apophysis, and one more proximal prolateral protrusion ( Figs. 12–14 ). Palps as in figs. 15–18. Coxa with a very pointed retrolateral apophysis ( Fig. 15 ). Femur proximally with a small basal rounded retrolateral apophysis ( Fig. 15 ).

Procursus dark brown, slender and slightly curved, with several median ventral ridges ( Figs. 15–16 ) and several basal prolateral hairs ( Fig. 16 ). Distinct tip of procursus, ending in a membrane, with a ventral projection ( Fig. 17 ). Bulb simple, with no transparent projection, embolar division of bulb membranous at the end ( Fig. 18 ). Legs light brown; without spines, vertical or curved hairs. Tarsus I with approximately 36 pseudosegments. Opisthosoma globular, pale green, with some lateral bluish spots.

Female. Unknown.

Other material examined. None.

Distribution. Known only from type locality.

Figures

FIGURES 12 – 18. Mesabolivar rudilapsi n. sp. 12. Chelicerae, frontal; 13. Chelicera, lateral; 14. Chelicerae, dorsal; 15. Left palp, retrolateral; 16. Left procursus, prolateral; 17. Tip of left procursus, dorsal view; 18. Left bulb, prolateral view. Scale lines: 0.5 mm.