74 
G.L. Pesce, P. De Laurentiis, W.F. Humphreys 
Figure 29 The location of the samples in northwestern Australia: Metacyclops mortoni sp. nov. (•); Mesocylops brooksi 
sp. nov. (#); Apocyclops dengizicus (O); Microcylops varicans (*). The small dots denote sites where 
stygofauna was found. 
segment with hyaline lamella provided with one 
deep notch; remaining ornamentation as in Figures 
18, 20, 21. 
Antenna. Endopodite 3-segmented; first segment 
with one inner seta, second segment with eight 
setae, third segment with an apical group of seven 
setae; segments I—II with rows of small 
integumental pits. All segments with a row of 
setules on the external side. Basipodite with 
vestigial exopodal seta overreaching tip of the 
distal segment of the endopodite, and two short 
subdistal setae, frontal side with the characteristic 
row of long spinules along the outer margin, 2-3 
rows of small spinules on the inner margin, and a 
transverse row of spinules below. 
Maxillulary palp not provided with spines. Other 
mouthparts as usual in the genus. 
Legs 1-4, spine and setae formula typical for the 
genus; couplers without setules on the caudal side. 
Leg 1, inner margin of the basipodite not armed 
with a spine. Leg 4: endopodite about 3.5 times 
longer than broad; apical spines subequal, outer 
spine equally serrated on both margins, inner spine 
with outer margin completely set with spinules, 
internal margin regularly serrated; couplers with 
pair of blunt tubercles, coxopodite armed with 3 
(frontal side) and 4 (caudal side) rows of spines/ 
setules; caudal side of the basipodite on its distal 
