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1a) Edge opposite hinge is rounded |
Go to 2 Go to 3 Go to 14 |
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2a) Ridges extend from hinge to outer edge (perpendicular to hinge) 2b) Ridges circle shell (parallel to hinge) |
Go to 4 Go to 5 |
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3a) Shell is rough (ribs, spines) 3b) Shell is smooth |
Go to 6 Go to 7 |
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4a) Hinge with ears 4b) Hinge without ears |
Atlantic Calico Scallop Go to 8 |
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5a) Thin, fragile, lightweight 5b) Thick and heavy shell |
Go to 10 Northern Quahog |
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6a) Fan-shaped 6b) Not fan-shaped |
Go to 11 Go to 12 |
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7a) Shell is slender, 6 times longer than wide 7b) Shell is rectangular, 3 times longer than wide |
Atlantic Jackknife Stout Tagelus |
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8a) Piano hinge (teeth-like) 8b) No piano hinge |
Incongruous Ark Go to 9 |
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9a) Ribs covered with raised scales (prickly) 9b) No raised scales on ribs |
Florida Prickly Cockle Atlantic Giant Cockle |
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10a) Almost translucent, paper thin 10b) Not translucent |
Common Jingle Go to 13 |
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11a) Approximately 30 ribs covered with small spines 11b) Fewer than 20 ribs, some with large spines |
Saw-toothed Penshell Stiff Penshell |
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12a) Angel-wing shaped 12b) Not angel-wing shaped |
Go to 15 Go to 16 |
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13a) Beak curves forward 13b) Beak does not curve forward |
Elegant Dosinia Cross-hatched Lucine |
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14a) Crisscross pattern of ridges 14b) No crisscross pattern |
Cross-barred Venus Go to 17 |
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15a) Approximately 30 sharply beaded ribs covering whole surface 15b) Strong ribbing only on one end of shell |
Angel Wing False Angel Wing |
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16a) Triangular shell with wing-like extensions 16b) Oval or circle-shaped; no wing-like extensions |
Atlantic Wing Oyster Go to 19 |
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17a) One end of shell pointed, other end rounded 17b) Both ends pointed |
Channeled Duckclam Go to 18 |
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18a) Beak central 18b) Beak towards one end of shell |
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19a) Strong radial ribbing 19b) No distinct ribbing |
Ribbed Mussel Eastern Oyster |
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