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Records of the Australian Museum (2014) Vol. 66 
Figure 29. Acutiramus iwasakii sp. nov. Male: (A) antenna endopod; (C) maxillule; (D) ridges and pits on left shoulder. Acutiramus 
cumulus sp. nov. male: (B) antennule setae; (E) diagram showing terminology used in description of male antennule. Scale bar: A, B, C 
= 0.05 mm. D = 0.06 mm. 
Both species are heavily burdened with suctorian protozoans 
round their perimeter (compare with Fig, 28A). 
Porcellidium tapui described by Hicks & Webber, 1983 
does not fit the diagnosis for Porcellidium , but fits the 
diagnosis fox Acutiramus and should be moved to that genus 
as A. tapui (Hicks & Webber, 1983). A. tapui displays a 
degree of variability in morphology and measurements that 
is unknown among algal living species, Hicks & Webber 
(1983). The question arises whether A. cumulus may be just 
an extreme form of A. tapui. There are some similarities 
between the two animals, but there are also significant 
differences as shown in Table 2. 
