Table 1.

Descriptions of life habit classes in the Pectinidae

Life habit	Description	Genera included in study	References
Nestle	Settle and byssally attach to living Porites corals; coral grows around and permanently contains scallop	Pedum	[38,61]
Cement	Permanently attaches to hard or heavy substratum as new shell is generated	Crassadoma, Talochlamys*	[62]
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	[39]
Recess	Excavates cavity in soft sediment; full/partial concealment	Euvola, Mizuhopecten, Pecten, Patinopecten	[39,40]
Free-living	Rests above soft sediment or hard substratum	Aequipecten, Anguipecten, Annachlamys, Argopecten, Brachtechlamys*, Cryptopecten, Decatopecten, Delectopecten, Equichlamys, Mimachlamys*, Mirapecten, Nodipecten, Pseudamussium	[39]
Gliding	Able to swim > 5 m/effort; includes a level swimming phase with a glide component	Adamussium, Amusium, "Amusium," Placopecten	[44-46]

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.