Attacobius thalitae, Pereira-Filho & Saturnino & Bonaldo, 2018

Pereira-Filho, José Moisés B., Saturnino, Regiane & Bonaldo, Alexandre B., 2018, Five new species and novel descriptions of opposed sexes of four species of the spider genus Attacobius (Araneae: Corinnidae), Zootaxa 4462 (2), pp. 211-228 : 217-220

Attacobius thalitae n. sp.

Figs 9, 10 ; Map 1

Type material. ♂ holotype from Estação Ecológica do Panga, Uberlândia , Minas Gerais, [19°11'40"S,

48°19'06"W], Brazil, VIII.2006, M. Mineo leg. ( IBSP 91 461); two ♂ paratypes, same data as holotype ( IBSP 91462 , IBSP 91460 ) ; ♂ paratype from Horto Barra do Moeda , Três Lagoas, Mato Grosso do Sul, 20°57'00"S, 51°47'00"W, Brazil, XI.2008, M. Uehara-Prado leg. ( UFMG 5127 ).

Etymology. The specific name is a patronym honouring the first author’s wife, Thalita Camara Ximenes Pereira.

Diagnosis. Males of Attacobius thalitae n. sp. share with those of A. demiguise n. sp. the short proximal end of the median apophysis and the absence of the tegular retrolateral groove ( Figs 11, 12 ). They are promptly recognized by the small, inconspicuous retro-dorsal cymbial process and the extremely developed prolateral tegular keel, which completely covers the embolar base in ventral view ( Figs 9, 10 ).

Description. Male (holotype, IBSP 91461). Carapace pale yellow, cephalic region slightly darker, anterior median eye area with black spot divided by longitudinal gap; chelicerae yellow with fangs brown; endites and labium yellow; endites without conspicuous brown pit on basal inner margin; sternum pale yellow with brown margins; legs: femur and patella yellow, tibiae, metatarsus and tarsus orange; abdomen pale grey. Total length 3.27. Carapace 1.34 long, 1.14 wide, 0.36 high. Clypeus 0.10 high. Eye diameters and interdistances: AME 0.09, ALE 0.08, PME 0.08, PLE 0.10; AME–AME 0.05, AME–ALE contiguous, PME–PME 0.10, PME-PLE 0.02, ALE– PLE contiguous. MOQ length: 0.21, front width: 0.23, back width: 0.25. Chelicerae 0.46 long, with 3 promarginal and 2 retromarginal teeth. Sternum 0.75 long, 0.83 wide. Abdomen 1.77 long, 1.07 wide. Leg measurements: I: femur 1.21/ patella 0.45/ tibia 1.10/ metatarsus 1.09/ tarsus 0.83/ total 4.68. II: 1.17/ 0.44/ 0.99/ 1.03/ 0.77/ 4.40. III: 1.07/ 0.40/ 0.93/ 1.09/ 0.84 / 4.33. IV: 1.31/ 0.38/ 1.08/ 1.24/ 0.86/ 4.87. Leg spination: I: femur d1-1-0, p0-0-1, r0, v0; tibia d0, p0, r0, v3-2 -2; metatarsus d0, p0, r0, v2-2 -0. II: femur d1-1-0, p0, r0, v0; tibia d0, p0, r0, v2-2 -2; metatarsus d0, p0, r0, v2.2.0. III: femur d1-1-0, p0, r0, v0; tibia d0, p0, r0, v0; metatarsus d0, p0, r0, v0. IV: femur d1-1-0, p0, r0, v0; tibia d0, p0, r0, v0; metatarsus d0, p0, r0, v0. Palp: RTA with two lobes; ventral lobe large; apical spur strongly sclerotized, arising sub-apically from ventral lobe; dorsal lobe small, with an inner excavation; cymbial prolateral process large, fused to cymbial transversal process; cymbial transversal process long, gently curved retro-basally, with large basal prong curved retro-apically; cymbial retrolateral tubercle absent; cymbial retrodorsal process small, lamelliform, triangular, pointed basally; prolateral tegular keel large, sub-rectangular, projected ventro-apically; ventral tegular keel absent; distal extension of median apophysis not protruded apically; median extension of median apophysis smooth, composed of single piece, proximal extension of median apophysis short ( Figs 9, 10 ).

Female. Unknown.

Distribution. State of Minas Gerais, Brazil (Map 1).

Material examined. Only the types.

Figures

FIGURES 9, 10. Attacobius thalitae n. sp., left male palp: 9. ventral view; 10. retrolateral view. Abbreviations: C, conductor; CPP, Cymbial prolateral process; CRP, cymbial retro-dorsal process; CTP, cymbial transverse process; dMA, distal end of median apophysis; E, embolus; mMA, median extension of median apophysis; pMA proximal end of median apophysis; PTK, prolateral ventral tegular keel.

FIGURES 11, 12. Attacobius demiguise n. sp., left male palp: 11. ventral view; 12. retrolateral view. Abbreviations: AS, apical spur of VL; C, conductor; CRP, cymbial retro-dorsal process; CRT, cymbial retrolateral tubercle; CTP, cymbial transverse process; DL, dorsal lobe of RTA; dMA, distal end of median apophysis; E, embolus; mMA, median extension of median apophysis; pMA proximal end of median apophysis; VL, ventral lobe of RTA.