240 
Records of the Australian Museum (2014) Vol. 66 
The body shape of the female syntypes (Bruce, 1990, 
fig. 24) differ slightly from that of the Australian specimen 
also illustrated by Bruce (1990, fig. 25) and also from that 
of the present material. The syntype female cephalon has 
an irregular and rounded cephalon deeply embedded in 
pereonite 1; the posterolateral margins of pereonite 1-3 are 
deeply convex; the posterior margin of pereonite 7 is well 
developed, laterally overlapping pleonite 1; pereonite width 
5 1.5 times pleon width; coxae 5-7 are short (“compact”) 
and do not extend to the posterior margins of their respective 
pereonite, moderately rounded uropod rami apices and 
rounded pleotelson posterior margin. The Australian 
specimens from Carnarvon and Bruce’s (1990) specimen 
differ from the syntypes in having a subquadrate cephalon 
(compared to the rounded cephalon), the posterior margin 
of pereonites 1-3 are subequal in width (compared to the 
progressive posterior margin width of pereonites 1-3), 
pereon and pleon are co-linear with sub-parallel lateral 
margins, both uropod rami apices rounded (compared to the 
rounded endopod and sub-truncate exopod) and subquadrate 
pleotelson posterior margin (compared to the smooth and 
rounded pleotelson). 
Smenispa irregularis is known to occur on host species 
from the family Sparidae, Carangidae and Psettodidae, 
suggesting the species has low host specificity. The current 
host Acanthopagrus latus is a schooling species that occurs 
in the Indo-West Pacific (Froese & Pauly, 2013). 
Acknowledgments. I (MBM) am grateful to receive the Geddes 
Postgraduate award from the Australian Museum which allowed 
me to conduct my research on cymothoid isopods, to Dr Stephen 
Keable for his assistance during my visit to the museum, and to 
the Museum of Tropical Queensland-Queensland Museum for the 
use of their facilities. 
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Manuscript submitted 24 October 2013, revised 2 May 2014, and accepted 
16 May 2014. Associate Editor Dr Donald J. Colgan. 
