Pillai: Serpulid polychaetes from the Australian Kimberleys 
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0.02mm 
0.02mm 
Figure 13. A-L, Hydroides exaltatus (Marenzeller, 1885), from AM W21496. (A,B) two views of an operculum; (C-7) bayonet collar 
chaetae C, an older chaeta with worn out teeth. Remaining bayonet chaetae have 3 to 5 teeth at base of blade. Note that teeth do not 
extend way down the boss as in H. pseudexaltatus (Fig. 17E,F,G-I), and their un-serrated notch is moderately long compared to that in H. 
pseudexaltatus in which it is very long.]; (7) thoracic uncini; (K) anterior abdominal uncini; (L) a juvenile specimen; it has two opercula; 
the main spine in the better-developed operculum is directed inwards, while it is directed outwards in the other; its anterior abdominal 
uncinal tori are lateral, separated by a wide gap dorsally, compared to older specimens (Fig. 12C) in which they almost meet mid-dorsally. 
