Penrose Point State Park 

Pierce Co., WA

Site Description:       

This beach is on Mayo Cove on the west side of Carr Inlet, due west of Tacoma, WA.  It is a muddy sand beach with some rubble.  An extensive spit reaches out into the cove and it is exposed at low tide.  The spit is made of siltstone lightly covered in sand and rubble.  Various seaweeds and algae are present.  There are also a few large boulders.
 

Google Map
 

                                    


Species List:

     Following is a list of mollusk species observed at this location by members and associates of the club.  This is by no means a complete list of the species which may occur at this site.  Revisions and additions to the data are made as we acquire new information.   When a site contains more than one very distinctive type of habitat or if multiple sites were included in a single location, then a species list for each is included.
    We indicate frequency of occurrence based on our observations.  This is an indicator of how likely it is that you may be able to find this species yourself and is not a formal population survey.  

     Frequency Code:  (Based on the assumption that you are looking in the appropriate location where the species
                                          likes tolive - on rocks, in sand, etc.  Some populations fluctuate seasonally.  Ours are based
                                          on the spring/summer seasons.)
     [4] - Rare - very difficult to find, maybe only a couple found after repeated visits to the site
     [3] - Uncommon - difficult to find, may not see on every trip but dedicated searching may turn up a few
     [2] - Common - easy to find, should locate a number of them on any given day
     [1] - Abundant - very easy to find, large numbers should be seen on every trip

     Bivalves
Clinocardium nuttallii  [2]
Crassostrea gigas  [2]
Leukoma staminea  [2]
Macoma inquinata  [2]
Macoma nasuta  [2]
Modiolus rectus  [4]
Mya arenaria  [3]
Mytilus complex  [2]
Nuttallia obscurata  [3]
Pododesmus macrochisma  [2]
Saxidomus gigantea  [2]
Tellina modesta  [4]
Tresus capax  [2]
Tresus nuttallii  [3]
Venerupis philippinarum  [2]
Zirfaea pilsbryi  [3]
 
     Gastropods
Alia carinata  [2]
Batillaria attramentaria  [2]
Crepidula fornicata  [3]
Crepipatella dorsata  [3]
Euspira lewisii  [2]
Hima mendica  [3]
Lacuna sp.  [4]
Littorina scutulata  [1]
Lottia pelta  [2]
Lottia persona  [2]

     Chitons
Mopalia lignosa  [2]
Tonicella lineata  [4]

     Nudibranchs
Haminoea vesicula  [4]

   
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This page last revised: 1-25-2011