Snails, Clams & Mussels
(Phylum Mollusca)

Instructions: For a larger view of the specimens below, click on an image. The enlarged image will appear on your screen in a new window. Close this new window when you are through viewing it. See note below regarding identification of macros. Further information on the identification and ecology of aquatic macroinvertebrates can be found from the materials mentioned on the Macro Resources Page.


Gilled Snails (Class Gastropoda, Subclass Prosobranchia)
Tolerance: tolerant to somewhat sensitive
thumbs/170.jpg
170.jpg
snail eggs*
Daybreak Park
East Fork Lewis River

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4.jpg

pond
Clark, Co., WA

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7.jpg

drainage ditch
Battle Ground, WA

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6.jpg

Lewisville Park
East Fork Lewis River

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5.jpg
genus: Juga

Lewisville Park
East Fork Lewis River

snail image
f2004/14.jpg
genus: Juga
(17 mm)
Lewisville Park
East Fork Lewis River
Fall 2004

snail image
f2004/15.jpg
genus: Juga
(17 mm)
Lewisville Park
East Fork Lewis River
Fall 2004

Harmony Dr. macro
harmony-IMG_0510.jpg
genus: Juga

Harmony Dr.
Longview, WA
July 2006

5.jpg
f2004/11.jpg
(8 mm)
Lewisville Park
East Fork Lewis River
Fall 2004

5.jpg
f2004/12.jpg
(8 mm)
Lewisville Park
East Fork Lewis River
Fall 2004

aquatic worm
efl_nov05_45.jpg
(7 mm)
Lewisville Park
East Fork Lewis River
November 2005

aquatic worm
efl_nov05_53.jpg
(7 mm)
Lewisville Park
East Fork Lewis River
November 2005

macro - 54
IMG_3321.jpg
Willow Grove Park
Cowlitz Co.
Columbia River
July 2007

 

 


Lunged (Pouch) Snail (Class Gastropoda, Subclass Pulmonata)
Tolerance: somewhat tolerant
macro - 54
tlp5-11-05_45.jpg
Physid Snail*
Family: Physidae
(10 mm)
Tiger Lily Pond
Clark Co., WA
May 2005

macro - 54
tlp5-11-05_52.jpg
Physid Snail
Family: Physidae
(10 mm)
Tiger Lily Pond
Clark Co., WA
May 2005

 

Limpet (Class Gastropoda, Subclass Pulmonata)
Tolerance: somewhat tolerant

limpet
efl_f06-20288.jpg
limpet on rock
Family: Ancylidae
Lewisville Park
East Fork Lewis River
September 2006

limpet
efl_f06-20291.jpg
Ancylid Snail
Family: Ancylidae
Lewisville Park
East Fork Lewis River
September 2006
limpet
efl_sep05_26_1.jpg
Ancylid Snail
Family: Ancylidae
(2.5 mm)
Lewisville Park
East Fork Lewis River
September 2005
limpet
efl_sep05_27_1.jpg
Ancylid Snail
Family: Ancylidae
(2.5 mm)
Lewisville Park
East Fork Lewis River
September 2005

Clam (Class Bivalvia)
Tolerance: tolerant

macro - 54
tlp5-11-05_35.jpg
Fingernail Clam*
Family: Sphaeriidae
(4 mm)
Tiger Lily Pond
Clark Co., WA
May 2005

macro - 54
IMG_3337.jpg
Clam

Willow Grove Park
Cowlitz Co.
Columbia River
July 2007

macro - 54
IMG_3351.jpg
Clam

Willow Grove Park
Cowlitz Co.
Columbia River
July 2007


Mussel (Class Bivalvia)
Tolerance: sensitive

aquatic worm
efl_sep05_31_1.jpg
Western Pearlshell*

(55 mm)
Lewisville Park
East Fork Lewis River
Sep. 2005

aquatic worm
efl_sep05_1237.jpg
mussel & snail

Lewisville Park
East Fork Lewis River
Sep. 2005

aquatic worm
efl_sep05_1224.jpg
mussels & sculpin


Lewisville Park
East Fork Lewis River
Sep. 2005


Note from author: Considerable effort has been made to be as accurate as possible in the identification of the organisms. While I am fairly confident of the ID (at least for the major taxon levels), I cannot guarantee complete accuracy. In particular, you will notice that some organisms are labeled with a (*). This indicates a probable classification based on general traits (shape, size and color) of the organism and location from which it was found. I do not possess the level of expertise nor did I conduct the kind of detailed inspection to provide a conclusive ID -- consider these efforts at classification as my "best guess" based on available information and, in some instance, outside assistance. (If you notice any errors or omissions, please contact me at the email address provided at the bottom of this page.)

Back to: Freshwater Macros Index


modified: 11/15/07