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Student Project Figures

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Figure 1
Figure 1: Images taken by Sandie and Bernie Degan and diagrams showing the physical appearance of Hydroides sp. found the ARMS plates. Photo A shows the operculum and tube of an indivdiual identified to be Hydroides diramphus. This identification was made from the shape of the verticil spines which are t-shaped, flattened and yellow in colour matching the description in Bastida-zavala et al. (2002) from which the correspinding diagram of a Hydroides diramphus operculum in 1 has been adapted. The length of the operculum is approximately 1.6 mm (Bastida-zavala et al. 2002). Photo B shows the operculum and branchial crown of an indivdiual identified as Hydroides elegans. Like in digram 2 also adapted from Bastida-zavala et al. (2002), of this species’ operculum the spines of the verticili in H. elegans are elongate, pointed and wings at their middle point. The size of the radioles of this animals branchial crown are 3.0mm (Bastida-zavala et al. 2002). This identification is less certain because of the quality of the photo so the identification was helped by comparison to past photos of this species from the ARMS plates and their abundance on the plate matched the distribution record of this species(Sun et al. 2015). Photo C has been identified as the species Hydroides ezoensis but this is a tentative ID because of the photo quality. Dirgram 3 adapted from Thorp et al. 2007 shows the operculum of Hydroides ezoensis. This idenitifcation was made using descriptions in Thorp et al. 2007 but it’s distribution does not align with this sighting. Due to morphological variation this specimen could also belong to the species Hydroides elegans or a number of other species but without up close inspection of the operculum identification will remain uncertain. 
Figure 1 Figure 2