Rocky Mountain ridged mussel (Gonidea angulata) management plan: Appendix 1

Appendix 1: Species Similar to the Rocky Mountain Ridged Mussel

Figure 10: California Floater Shell

Figure 10: California Floater shell, similar in size and shape to the Rocky Mountain Ridged Mussel but lacking the lateral ridge running parallel to the anterior margin of the shell. Photo J. Heron.

California Floater shell, similar in size and shape to the Rocky Mountain Ridged Mussel but lacking the lateral ridge running parallel to the anterior margin of the shell. Photo J. Heron.

Figure 11: Western Floater

Figure 11: Western Floater has a less prominent lateral line, and a smooth thin shell. Photo J. Heron.

Western Floater has a less prominent lateral line, and a smooth thin shell. Photo J. Heron.

Figure 12: Western Pearlshell

Figure 12: Western Pearlshell. Note the concavity of the outer edge of the shell, (more prominent in older specimens). These specimens are from Ashton creek east of Enderby and north of Armstrong, B.C. Photo L. Gelling.

Note the concavity of the outer edge of the shell, (more prominent in older specimens). These specimens are from Ashton creek east of Enderby and north of Armstrong, B.C.  Photo L. Gelling.

Figure 13: Inside of Western Pearlshell

Figure 13: Inside of Western Pearlshell. Note the purplish nacre and the large pseudocardial teeth. Photo J. Heron.

Note the purplish nacre and the large pseudocardial teeth. Photo J. Heron.

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