23 pages matching byssus in this book
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Key for guidance to the identification of the Superfamilies
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adductor muscle scar Atlantic coast beaks beaks in front bifid bivalve British Isles broadly oval byssus cardinal teeth Chlamys chondrophore circular in outline coast of Morocco concentric lines concentric ridges confluent convex crenulate dark brown directed inwards dorsal dorsal line equilateral equivalve escutcheon fathoms gape grooves Growth stages clear Hinge line Iberian Peninsula inequilateral inequivalve Inside of shell Interior of shell internal ligament intertidal zone large specimens measure large specimens reach lateral teeth left valve Ligament external light brown Linnaeus Lunule Margin crenulate Margin smooth Mediterranean metres midline muddy sand Norwegian Sea offshore oval in outline Pallial sinus Pallial sinus deep Periostracum posterior lateral posterior margin posteriorly prominent radiating lines radiating ribs real length resilifer right valve Sculpture Sculpture of concentric Shell brittle Shell solid shell white slightly sometimes species spines Text-fig Thracia Three cardinal teeth tooth triangular in outline umbonal reflection ventral margin white in colour