Table 1

Descriptions of life habit classes in the Pectinidae

Life habit


Genera included in study



Settle and byssally attach to living Porites corals; coral grows around and permanently contains scallop




Permanently attaches to hard or heavy substratum as new shell is generated

Crassadoma, Talochlamys*


Byssal attach

Temporarily attaches to a substratum by byssus threads; can release and reorient

Azumapecten, Brachtechlamys*, Caribachlamys, Chlamys, Coralichlamys, Cyclopecten, Excellichlamys, Gloripallium, Laevichlamys, Leptopecten, Mimachlamys*, Pascahinnites, Scaeochlamys, Semipallium, Spathochlamys, Talochlamys*, Veprichlamys, Zygochlamys



Excavates cavity in soft sediment; full/partial concealment

Euvola, Mizuhopecten, Pecten, Patinopecten



Rests above soft sediment or hard substratum

Aequipecten, Anguipecten, Annachlamys, Argopecten, Brachtechlamys*, Cryptopecten, Decatopecten, Delectopecten, Equichlamys, Mimachlamys*, Mirapecten, Nodipecten, Pseudamussium



Able to swim > 5 m/effort; includes a level swimming phase with a glide component

Adamussium, Amusium, "Amusium," Placopecten


Species-specific classes are the predominant life habit exhibited by sexually mature individuals listed from least to most active. An asterisk indicates multiple life habits are exhibited within the genus.

Alejandrino et al. BMC Evolutionary Biology 2011 11:164   doi:10.1186/1471-2148-11-164

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