Key:  Family Porcellanidae

Phylum Arthropoda
 Subphylum Crustacea
  Class Malacostraca
   Subclass Eumalacostraca
    Superorder Eucarida
     Order Decapoda
      Suborder Pleocyemata
       Infraorder Anomura
        Superfamily Galatheoidea

Taken primarily from  Kozloff, 1987, 1996 p. 411 (Copyright 1987, 1996, University of Washington Press.  Used in this web page by permission of University of Washington Press)

An alternate key to some of these species can be found in Wicksten, 2009 page 269.
 
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1a Chelipeds equal or nearly equal, flattened, with a finely granulated surface, not covered with plumose hairs (picture) 2
1b Chelipeds decidedly unequal, thick, roughened by tubercles (picture), and covered with plumose hairs 3
2a Carpus of chelipeds about twice as long as wide, with parallel anterior and posterior margins Petrolisthes eriomerus
2b Carpus of chelipeds about 1.5 times as long as wide, with anterior and posterior margins not parallel Petrolisthes cinctipes
3a Telson with 7 plates; carpus of chelipeds with 3 or 4 uneven, serrated teeth on the anterior margin Pachycheles pubescens
3b Telson with 5 plates, carpus of chelipeds with a broad, nearly triangular lobe on the anterior margin (picture) Pachycheles rudis



Taxonomic Levels Represented in This Key:

 Pachycheles pubescens
 Pachycheles rudis
 Petrolisthes cinctipes
 Petrolisthes eriomerus



Page created by Dave Cowles, 2005
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