Carolinea 77

L amos : Discovery of Belba sculpta M ihel č i č , 1957 147 mulae of leg setation, including famulus: leg I: (1- 7-4-4-20); leg II: (1-6-4-5-17); leg III: (2-4-3-4-17); leg IV: (1-4-3-4-13). Solenidial formulae: I: (1-2- 2); II: (1-1-2); III: (1-1-0); IV: (0-1-0). Solenidia of genua I-III and tibiae II-IV both coupled. Setae on trochanter and femur of legs I-IV slender, smooth, elongate except femur II paraxially with a con- spicuous thick, short, hornlike seta l’. Setae d on femur IV, genu IV and tibia IV distally flagellate and extremely long, with seta d of tibia IV mea- suring 260 µm. Setae l’ of these segments similar in appearance and very elongate with seta l’ of tibia IV attaining a length of 243 µm. Leg IV mea- sures 1,5 times the ventral body length. Body dimensions Total body length 561 (526-598) μm. Ventral body length 523 (506-548) μm. Body width 347 (315-368) μm. A slight sexual dimorphism exists. Females are on the average 22 μm longer than males (v. b. l., two tailed t-test, n = 17, P < 0.01). Ratio of ventral body length to body width 1,5:1. Body height 293 μm. Length of proterosoma 209 μm. Length of hysterosoma 312 μm. Integument Colour of adults chestnut-brown. Cuticle strongly sclerotized, finely granular in appearance with the microtubercles small, round in dorsal view, variable in size and spacing regionally. Microtu- bercles comparatively large and widely spaced on the central region of the notogaster and pos- terior prodorsal surface; smaller, less distinct on rostral tip, notogastral margin, genital and anal plates as well as on the surfaces of gen- uae, tibiae and tarsi. Medial to lyrifissure ia the diameter of the microtubercles is 0,1-0,2 µm, and their density is 20/µm 2 . Body markedly mi- crotuberculate and strongly sclerotized on all enantiophyses. Epimeres I-IV without sizeable cuticular tubercles, alveoli or other significant sculpturing besides the apophyses and muscle scars. Cerotegument waxy, white in colour, cov- ers most of external body surface. Cerotegumen- tal particle aggregations mostly filamentous, but ranging from columnar to cottony in appearance. Individual cerotegumental filaments sometimes very elongate, reaching a length of up to 90 µm. Cerotegument especially thick on prodorsum, sejugal region, epimeral region and proximal leg segments. Body and leg setae often covered with cerotegumental excrescences. Integument occa- sionally with loosely attached debris and fungal micelles. Notogaster never carrying a compact mass of debris and usually without exuvial scalps but one newly moulted adult specimen transport- ing these on the notogaster. Prodorsum (Figs. 1, 3) Prodorsum approximately triangular in dorsal perspective, narrowed in sejugal area. Maximum width of prodorsum 215 (207-233) µm.The length of the prodorsum, measured from the rostral tip to the dorsosejugal groove in lateral view, is about equal to its width. Rostral tectum broad, rounded anteriorly in dorsal view. Rostrum projecting an- teroventrally in lateral view. Weakly developed, slightly elevated naso-like structure present, with a well demarcated oval semi-fenestrate area of lighter cuticle. Tectum of podocephalic fossa not ventrally projecting. Rostral and lamellar setae thin, smooth, slightly attenuate, curved laterad and then strongly inwards towards the sagittal plane. Seta le (80-90 µm) > ro (70-80 µm). Mutual distance between insertion points of se- tae le: 42 µm < ro: 61 µm. Exobothridial setae 60 µm in length, setiform, without barbs, only slightly thinner than the lamellar setae. A small gland opening situated close to insertion of seta ex. Interlamellar setae smooth, slender, thickest in the proximal region, frequently undulating, dis- tally very thin and flagellate, and very long (220- 240 µm). Sensillus smooth and minimally thicker at its basis than the interlamellar setae. Sensillus initially relatively straight, distally flagellate, and very long (190-230 µm). Interlamellar setae and sensillus frequently with a broken-off distal part. Bothridium laterally directed, irregularly funnel shaped with a fairly large opening; proximally with internal ring-like ridges and distally with faint radiating bands of chitin, providing mechanical support to the weakly sclerotized distal both- ridial funnel. Bothridial border entire. Postboth- ridial tubercles Ba and Bp large, subtriangular, well developed, with rounded tips. True postboth- ridial ridges and antebothridial ridges absent. Apophyses Aa, Ap of prodorsal enantiophysis, Da, Dp of dorsosejugal enantiophysis and La, Lp of laterosejugal enantiophysis absent. Prodor- sum without conspicuous tuberculate or alveolar sculpturing. Propodolateral apophysis, lamellae, costulae, tutorium and areae porosae absent. Prodorsum elevated in the region of the larger internal muscle attachments. A noticeable field of muscle sigillae situated in the mid-sagittal plane just anterior to the dorsosejugal groove. Addition- al smaller sigillae located anterior and paraxial to apophysis Ba, and anterior, lateral and posterior