240 
H. Smit 
Figures 20-24 Arrenurus (Arrenunis) mantonensis sp. nov., holotype 6 (unless stated otherwise): 20, ventral view; 21, 
dorsal view; 22, lateral view; 23, palp; 24, ventral view, paratype $. Scale lines, 50 pm (Figure 23), 200 
pm (Figures 20-22, 24). 
humps (Figure 22). Gonopore 68 long. Genital 
plates long and narrow, extending onto lateral side 
of body (Figure 20). Posterior margin of genital 
plates with numerous long setae. Petiole 155 long 
(measured from ventral view) and 102 wide, with 
a rhomboid hyaline area. Petiole ventrally with two 
bifurcated setae, medial part of petiole with a 
finely serrated lateral margin. Hyaline membrane 
absent. Cauda dorsally with a tubercle, just 
anterior of petiole. Lengths of PI-PV: 29, 54, 31, 82, 
29; PII with 3 setae on medial side, PIV very 
slender, with a very short anterior margin (Figure 
23). Lengths of I-leg-4-6: 146, 136, 194. Lengths of 
IV-leg-4-6: 204, 165, 112; IV-leg-4 without a spur. 
Female 
Body 941 long and 844 wide. Anterior body 
margin slightly concave. Posterolateral comers of 
body distinct, posterior body part truncated, 
posterior body margin straight. Dorsal furrow 
complete, dorsal shield 815 long. D1 on very small 
humps. Medial margin of CX4 larger than medial 
margin of CX3. Medial distance of CX4 less than 
width of one genital valve. Gonopore 107 long, 
genital valves without chitinous patches. Genital 
plates long and straight, anterior margin slightly 
undulating (Figure 24). Lengths of Pl-PV: 25, 52, 
34, 78, 25; palp as in male. Lengths of I-leg-4-6: 160, 
165, 175. Lengths of IV-leg-4-6: 228,194, 175. 
