Carolinea 77

L amos : Discovery of Belba sculpta M ihel č i č , 1957 151 valves smooth, each with two sparsely barbed thin setae: an1, an2. Anal lyrifissure ian obser- vable as a small slit in the anterolateral corner of each valve. Aggenital setae ag (36 µm) late- roventrad genital plates, similar in size and ap- pearance to genital setae. Genital and anal ca- vities both surrounded by an externally reflexed rim. Anal plates with a well-defined medial carina. Anteriormost medial part of anal opening cove- red by unpaired preanal organ, which serves to retract the anal valves. Two articular sockets con- nect the preanal organ to the anterior border of the anal opening. Adanal lyrifissures iad oblique, anterolateral to the anal plates. The pregenital chamber contains the genital pa- pillae as well as either a spermatopositor or a ovipositor. Genital papillae Va, Vm, Vp lobe-like, approximately equal in shape and dimensions. Spermatopositor egg-shaped in ventral view, with seven hollow setal pairs: Ψ 1, Ψ 2, τ 1, τ 2, τ 3, τ 4, kx. Setae Ψ 1, Ψ 1, Ψ 2, Ψ 2 form a distinct group situated ventrally to a sclerotized strip lo- cated along the midline of the spermatopositor when observed in ventral perspective. In similar view, setal group τ 1, τ 2, τ 3, τ 4, kx occurs in two clusters, one on each side of the sclerotized me- dian strip. The spermatopositor serves to produ- ce stalked spermatophores. Ovipositor a short, tubular, hollow cylinder consi- sting of a proximal part Pp and a distal eversible portion subdivided into a base bDp and three co- nical eugenital lobes L1-L3.The latter encircle the eugenital opening through which the egg exits. Unpaired ventral lobe L1 with 4 setae, the apical setae Ψ 1, Ψ 1 and the proximal Ψ 2, Ψ 2. Paired dorsolateral ovipositor lobes L2 and L3 each with 4 setae: τ 1 in an apical position, τ a most proximal and setae τ b, τ c in between. The insertion points of setae τ a, τ b, τ c of each lobe are grouped close together, approximately in the shape of an equi- lateral triangle. All setae on eugenital lobes thick, spinelike, eupathidial, about 18 μm in length. The surface of the lobes is smooth, while that of Pp and bDP is pleated. The ovipositor base bDp is Figure 3. Belba sculpta adult, lateral aspect.