Australian Pionidae 
363 
Pedipalpal tibia moderately stout, with distinct 
ventral setiferous tubercles (Figures 66, 77, 
89).7 
7. Acetabula arranged in 2 distinct, circular 
groups. Fiona cumberlatidensis (Rainbow) 
Acetabula arranged in 2 semi-circular rows 
(Figures 57, 70, 82).8 
8. Dorsal setae of pedipalpal femur and patella 
simple (Figures 66, 77)... Piona auslralica K.O. 
Viets, Piona marchanti sp. nov. 
Dorsal setae of pedipalpal femur and patella 
setose (Figure 89). Piona murleyi sp. nov. 
Subfamily Huitfeldtiinae K. Viets 
Larri gen. nov. 
Type species 
Larri laffa sp. nov. 
Diagnosis 
Legs III and IV of male unmodified. Body 
without accessory sclerotization. Genital field with 
3 pairs of acetabula. Excretory pore not 
surrounded by sclerotized ring. 
Description 
Glandularia: 5 pairs of dorsoglandularia, 4 pairs 
of lateroglandularia and 6 pairs of 
ventroglandularia. Venter: coxae not fused into 
single plate; excretory pore not surrounded by 
sclerotized ring. Genital region: 3 pairs of circular 
acetabula; d acetabular plate with medial seta in 
addition to normal setae, and flanked by several 
setae. Pedipalpal tibia with 2 ventral setae situated 
in small tubercles. Legs: unmodified; swimming 
setae present on all legs. 
Remarks 
This genus is one of the most plesiomorphic 
pionid genera, and appears to most closely 
resemble the Holarctic genus Huitfeldtia Thor, from 
which it differs by the presence of only three pairs 
of acetabula. 
Etymology 
The generic epithet is an arbitary combination of 
letters, and is feminine in gender. 
Larri laffa sp. nov. 
Figures 1-10 
Material Examined 
Holotype 
d, Poorginup Swamp, Western Australia, 
Australia, 34°33'S, 116°44'E, 4 September 1985, M.S. 
Harvey, T.J. Doeg (WAM 88/2929; SL). 
Para types 
Australia: Western Australia: 2d, 32, 1 
deutonymph, same data as holotype (WAM 88/ 
2930-2933, 2939-2940; SL, FL); 2d, 29, same data 
as holotype (NMV K857-858, K995-996; SL, FL); 
Id, 12, same data as holotype (CNC; SL); Id, 12, 
same data as holotype (DCC; SL); 2d, 32, Lake 
William, West Cape Howe Natl Park, 35°05'S, 
117°36'E, 3 September 1987, M.S. Harvey, J.D. 
Blyth (WAM 88/2934-2938; SL); 2d, 39, same data 
(NMV K861-863, K997-998; SL, FL); 2d, roadside 
pool, Chesapeake Road near crossing of Gardiner 
River, 34°48'S, 116°10'E, 29 August 1987, M.S. 
Harvey, J.D. Blyth (WAM 88/2941-2942; FL). 
Diagnosis 
As for genus. 
Description 
Adult 
Colour pale purple. Glandularia: 5 pairs of 
dorsoglandularia, 4 pairs of lateroglandularia and 
6 pairs of ventroglandularia (Figures 1-3). Dorsum 
(Figure 1): with 1 pair of dorsalia slightly posterior 
to postocularia. Venter (Figures 2-3): coxae not 
fused into single plate; apodemes of coxa I short; 
coxae I not fused in mid-line; suture lines between 
coxae III and IV reaching mid-line, extending 
laterally; excretory pore not surrounded by 
sclerotized ring. Genital region (Figures 5-6): 3 
pairs of circular acetabula; 5-6 (d), 5-8 (2) pairs of 
small setae present on lateral margin of acetabular 
plates, a further medial seta present in d; 
acetabular plate of d flanked by several setae. 
Chelicera stout (Figure 4). Pedipalp (Figure 9): tibia 
with 2 ventral setae situated in small tubercles, and 
a single distal, medial seta. Legs (Figures 7-8): 
unmodified; with swimming setae arranged as 
follows: leg I: d, tibia 0-2, 2, tibia 1-3, metatarsus 
0-2; leg II: d, patella 1, tibia 4, metatarsus 4-5, 2, 
patella 1, tibia 5-6, metatarsus 3-5; leg III: d, 
patella 1, tibia 4-5, metatarsus 5-6, 2, patella 1, 
tibia 6, metatarsus 6-7; leg IV: d, patella 1, tibia 4- 
5, metatarsus 5-7, 2, patella I, tibia 4-5, 
metatarsus 5-7; male legs III and IV not modified. 
Dimensions (pm), d (2): body 531-570/384-429 
(506-864/408-518); capitulum length 100-107 (96- 
121); chelicera length 129 (121); genital field 67-89/ 
84-93 (111-182/108-160). Pedipalp: trochanter 25- 
29 (25-30), femur 80-84 (86-95), patella 45-52 (48- 
57), tibia 84-91 (85-99), tarsus 50-51 (49-60). Leg I: 
trochanter 54-57 (57-65), femur 58-69 (66-80), 
patella 87-95 (91-102), tibia 115-129 (127-148), 
metatarsus 135-148 (147-166), tarsus 158-180 (141- 
186). Leg IV: trochanter 87-99 (94-102), femur 78- 
