Close up shot of Filograna implexa characteristic tentacular crown and yellow operculm
Photo by Emma Blacklock
This species is identified from other related species such as Salmacina dysteri (family Serpulidae) by a number of morphological and mineralogical components. Specifically it is distinguished by collar setal morphology, thorax segmentation count and its distinctive yellow cup shaped operculum (Richards, 2008; Van Nieuwenhuijzen, 2011). F. implexa in particular has a calcite dominated tube chemical framework with minor component of aragonite (Vinni et al., 2008)