Bioacoustics of Caracladus leberti

Description. Male (NMB 1601a): Total length: 1.62 mm . Cephalothorax: honey brown (138 U); broadly oval; 0.83 mm long without cephalic lobe, 0.85 mm long with cephalic lobe ( Fig. 35 ); 0.62 mm wide. Cephalic lobe: frontally steeply declining, rounded protuberance between and lateral to the PME ( Thaler 1973 ), lobe at PME 0.23 mm wide dorsally; fine, short pubescence with some long hairs; broad lateral sulci ( Thaler 1973 ). Eyes: PME upmost on the cephalic lobe ( Fig. 34 ); AME projecting forward; long, upwards facing hairs between AME ( Fig. 35 ). Clypeus: directed obliquely backwards. Sternum: very fine brown (469 U) pigmentation on yellow (124 U) ground, dark brown (469 U) on the margins; 0.50 mm long; 0.46 mm wide. Chelicerae: honey brown (138 U); fine and dense stridulatory striae. Legs: yellow (122 U); tibia III–IV with one dorsal proximal macroseta (0-0-1-1), 1.1–1.3 times longer than diameter of tibia; Tm I: 0.57. Pedipalp: patella three times longer than wide; tibial apophysis directing distally with retrolaterally curved tip; paracymbium simple; tegulum with short and long protegular papillae on protegulum; suprategular apophysis with marginal suprategular apophysis and pointed distal suprategular apophysis; embolic membrane slender without papillae; radix simple without any processes other than the short radical tailpiece and a strongly sclerotised embolus. Abdomen: light brown (125 U); booklung covers yellow (122 U), scaly. Female (NMB 1601a): Total length: 1.51 mm . Cephalothorax: honey brown (138 U); 0.77 mm long, 0.57 mm wide. Eyes: posterior eyes separated by their diameter. Sternum: very fine brown (469 U) pigmentation on yellow (124 U) ground, dark brown (469 U) on the margins, 0.49 mm long, 0.45 mm wide; coxa separated by their diameter. Chelicerae: honey brown (138 U); promargin with six big teeth; retromargin with five to six denticles; stridulatory striae fine and dense. Legs: yellow (122 U); formula 4-1-2-3; tibia I–IV with one dorsal proximal macroseta (1-1-1-1); Tm I: 0.48. Epigyne: copulatory opening at anterior end of trapezoid dorsal plate ( Fig. 37 ). Vulva: receptacula globular, incoming dorsally; copulatory duct faces forward/laterad, then aborad and finally mediad/aborad where they are stronger sclerotised ( Figs 38, 39 ; Thaler 1973 ). Abdomen: light brown (125 U). Variation. The measurements are based on alcohol material from NMB (1601a: 5♂ 5♀ ). Males (n=5, means in brackets): The coloration is variable. E.g. Thaler (1973) describes the abdomen as blackish and the legs as brownish whereas our specimens were much brighter presumably due to the long storage in alcohol. Total length 1.55–1.68 mm ( 1.61 mm ). Cephalothorax: 0.81–0.85 mm ( 0.83 mm ) long without cephalic lobe, 0.84–0.89 mm ( 0.86 mm ) long with cephalic lobe; 0.62–0.69 mm ( 0.65 mm ) wide. Cephalic lobe: at PME 0.22–0.24 mm ( 0.23 mm ) wide dorsally. Legs: Tm I: 0.56–0.59 mm ( 0.58 mm ). Females (n=5, means in brackets): The colorations are variable. Total length 1.34–1.79 mm ( 1.59 mm ). Cephalothorax: 0.72–0.81 mm ( 0.76 mm ) long; 0.55–0.62 mm ( 0.59 mm ) wide. Legs: Tm I: 0.48–0.66 mm ( 0.57 mm ).