Carolinea 77

152 Carolinea 77 (2019) very broad, together with its short lobes it is only slightly longer (81 µm) than wide (57 µm) and bears six thornlike eupathidial setae k, each with a length of roughly 20 μm. Gnathosoma (Figs 3, 7) The gnathosoma consists of the infracapitulum, paired chelicerae and paired pedipalps. This unit resides within a cavity, the camerostome. Infra- capitulum diarthric, with a transverse labio-genal articulation. Mentum quadrate in shape, slightly wider than long, medially with two slightly asym- metrical rows of sigillae of pharyngeal muscles. The posterior of the infracapitulum articulates via two grooves with a pair of condyles at the lateral base of the mentotectum. Genal notch absent. Genal carinae anteriorly bearing pedipalps and minute supracoxal seta e1. Infracapitular setae h, m, a bilaterally barbed, tapering, curved to- wards the midline and of medium length; relative lengths: h ≥ m > a. Ventral surfaces of mentum and genuae microtuberculate. Anterolaterally each gena is separated by a dorsal manubrial area porosa from the rutellum. Rutella smooth, atelebasic, with a conspicuous distal hyaline swelling. Paraxial surface of each rutellum with rutellar brush. Labrum elongate, arrowhead-like in appearance, with an acute tip. An area poro- sa positioned on antiaxial side of the gena and also in the cheliceral groove. Lateral lips rela- tively broad, each anteriomediad with a long, tri- angular, membranous tip, distally with the adoral sclerite bearing slender, smooth, needle-like ad- oral setae or1 and or2. Mouth opening situated between the unpaired dorsal labrum and the two latero-ventral lateral lips. Chelicerae robust, chelate-dentate and elongate (122 µm). Digitus fixus and digitus mobilis each with 3 large triangular teeth. Site of articulation of cheliceral digits situated ventral to insertion of seta chb. Seta cha inserted in a dorsal to some- what paraxial position, directed anteriad, long, evenly barbed, with a ventral bend in the distal half and tapering at the tip. Seta chb slightly shorter, antiaxially situated, barbed with the lon- gest barbs in the distal third, where they form a distinct fringe which shortens strongly towards the tip. Paraxial cheliceral surface with three tiny chitinous spines sp posterior to seta cha. Body wall attaches obliquely to the proximal third of the chelicerae. A very large area porosa located antiaxially between approximately the distal line of attachment of the cheliceral sheath and the in- sertion point of seta chb. Ventral region of digitus mobilis also with a small porose area. Lamellated organ located paraxially on principal segment of chelicera. Trägårdh´s organ long, slender, tape- ring to a thin tip, on paraxial side. Coxal opx, ven- tral opv and paraxial oncophyses op’ present. Pedipalpi slender, pentamerous, with a length of 201 μm. Setal formula of pedipalps: 0-2-1-3-9(1). Solenidion ω distally directed, with a rounded tip and laid dorsolaterally on the tarsal cuticle, not associated with the seta acm. Subultimal su, ultimal ul’, ul’’ and anteroculminal acm setae in- serted distally on tarsus, eupathidial and appro- ximately half the length of the solenidion. Inferior inf and superior sup seta of palpfemur, lateral seta l’’ of palpgenu, and lateral l’, l’’ setae of palp- tibia distinctly barbed. Dorsal seta d of palpgenu as well as culminal cm, lateral l’, l’’, and ventral vt’, vt’’ setae of palptarsus smooth. All setae ex- cept eupathidia elongate, slender, acuminate. Palparsus with a dorsoproximal lyrifissure. Legs (Tab. 1, Figs 4-6) Legs with five free segments. Leg segments elongate, clavate, often with slightly wrinkled in- tegument and muscle scars on bulbs, particular- ly the femora. Trochanter I and II short, straight. Trochanter III and IV both much longer, bent posteriorly at a right angle at the point where they emerge from the acetabulum, distally with a small antiaxial spur-like projection, a tectum, protecting articulation with femur. Femur I and II bent at a right angle just immediately distal to their articulation with the trochanter. Femur III and IV straight instead. Leg lengths, based on a sample of 5 individuals, are: I: 551 µm, II: 423 µm, III: 528 µm, IV: 783 µm. Relative lengths of legs I to IV are: 1: 0,77: 0,96: 1,42. Leg IV 1,5 times the ventral body length. Setae on trochantera, femora and genua most- ly slender, smooth and relatively long. Femur II paraxially with very conspicuous smooth, thick, Table 1. Leg segment lengths of Belba sculpta adults, n = 5 (in µm). Segment Leg I Leg II Leg III Leg IV trochanter – – 80 117 femur 197 145 146 203 genu 72 57 56 87 tibia 99 77 95 161 tarsus 205 172 208 263