Australian Arrenurus 
237 
4-6: 223, 204, 213. Lengths of IV-leg-4-6: 296, 175, 
194; IV-leg-4 with a short spur. 
Female 
Body 1416 long and 1296 wide. Anterior and 
posterior body margin concave. D1 and L4 on 
humps. Dorsal shield slender, rounded anteriorly 
and truncated posteriorly (Figure 7). Medial 
margin of CX4 longer than medial margin of CX3. 
Distance of CX4 larger than one genital valve. 
Gonopore 145 long, genital valves with small 
chitinous patches. Genital plates narrow and short, 
slightly bowed (Figure 6). Excretory pore 
surrounded by a large sclerotization. Lengths of 
PI-PV: 48, 113, 98, 124, 82; palp as in male, but PII 
has in anteroventral comer two large and one small 
seta (Figure 8). Lengths of I-leg-4-6: 213, 204, 204; 
lengths of IV-leg-4-6: 272, 233, 243. 
Remarks 
The female of the new species has a similar 
dorsal shield as A. balladoniensis, but is smaller, 
with distinct humps on the dorsum. Males of the 
two species differ in the shape of the petiole. The 
shape of the petiole separates the male from other 
species. 
Etymology 
The species is named after the sword-like petiole. 
Arrenurus (Arrenurus) harveyi sp. nov. 
Figures 9-14 
Material Examined 
Holotype 
S, Chinderwariner Pool, Millstream-Chichester 
National Park, Western Australia, Australia, 15 
August 1994 (WAM). 
Paratypes 
Australia: Western Australia: 2 d (ZMA), 1 9 
(WAM), same data as holotype. 
Diagnosis 
Petiole of rounded shape, ligulate process 
reversed mushroom-shaped. Female with distinct 
posterolateral comers of the body; genital plates 
straight and narrow, slightly sloping; genital valves 
with small, rounded chitinous patches, connected 
by a small strip. 
Description 
Male 
Body 1154 (1096-1135) long (including petiole) 
and 766 (732-745) wide. Body colour blueish. 
Anterior margin of body concave. Cauda and 
pygal lobes well developed (Figure 9). Dorsal 
shield incomplete, anterior part more or less 
triangular. D1 on small hump; D3 on large fused, 
obtuse hump (Figure 12). Gonopore 49 long. 
Genital plates narrow and long, extending onto 
lateral sides of body (Figure 11). Hyaline 
membrane well developed, trapezoid, posterior 
margin concave. Petiole 146 long (measured from 
ventral view), extending beyond pygal lobes, 
rounded posteriorly. Ligulate process reversed 
mushroom-shaped (Figure 10). Curved setae 
extending to posterior margin of petiole. Lengths 
of PI-PV: 36, 77, 60, 96, 58; PII with 4 seta on 
medial side, of which 2 setae in anteroventral 
comer (Figure 13). Lengths of I-leg-4-6: 155, 146, 
204; lengths of IV-leg-4-6: 286, 107, 146; IV-leg-4 
with a spur. 
Female 
Body 1038 long and 825 wide. Anterior body 
margin rounded. Posterolateral corners very 
distinct. L3 on small humps. Gonopore 87 long; 
genital valves with small, rounded chitinous 
patches; anterior and posterior patch connected by 
a small strip. Genital fields straight and narrow, 
slightly sloping, laterally rounded (Figure 14). 
Length of PI-PV: 29, 67, 50, 88, 49. PII with 2 setae 
on medial side, of which one seta located 
anteroventrally. Length of I-leg-4-6: 87, 68, 145.; 
length of IV-leg-4-6 175, 145,136. 
Remarks 
The assignment of the female is somewhat 
uncertain, as two different Arrenurus species 
Table 1. Previously reported Arrenurus species from 
Australia (compiled from Cook 1986; K.O. 
Viets 1975; K.O. Viets 1981; Smit 1992; Smith 
and Harvey 1989). 
Arrenurus (Arrenurus) nuslralicus Lundblad 1941 
A. (Arrenurus) balladoniensis Halfk 1940 
A. (Arrenurus) fissipetiolatus Lundblad 1947 
A. (Arrenurus) pseudoaffinis Piersig 1906 
A. (Megaluracarus) cheetus Cook 1986 
A. (Megaluracarus) harpagopalpus Walter 1929 
A. (Megaluracarus) margatellus Cook 1986 
A. (Megaluracarus) olodus Cook 1986 
A. (Megaluracarus) roobeeki Smit 1992 
A. (Megaluracarus) restrains Daday 1898 
A. (Megaluracarus) rostratus degeneratus K.O. Viets 1984 
A. (Megaluracarus) thienemanni K.O. Viets 1984 
A. (Megaluracarus) tricornutus K. Viets 1955 
A. (Megaluracarus) vanderpalae Smit 1992 
A. (Megaluracarus) victorianus K.O. Viets 1978 
A. (Micruracarus) forpicatoides Lundblad 1941 
A. (?Micruracarus) kitchingi Smith and Harvey 1989 
A. (Truncaturus) haswelli Cook 1986 
A. (Truncaturus) novaehoUandiae Lundblad 1947 
A. (Truncaturus) tasmanicus Lundblad 1941 
