Razor clam. Atlantic jackknife clam, Ensis directus. Razor shell, Ensis arcuatus. Siliqua alta, the northern or Arctic razor clam. Siliqua costata, Atlantic razor clam. Pacific razor clam, Siliqua patula. Gould's razor shell, Solen strictus. Rosy razor clam, Solecurtus strigilatus. The Pacific razor clam, Siliqua patula, is a species of large marine bivalve mollusc in the family Pharidae. Contents. 1 Range; 2 Description; 3 As food . 3 days ago - Types of Clams. 01 of 10. Types of Clams. 02 of 10. Hard-Shell Clams/Quahogs/Round Clams (Mercenaria mercenaria) 03 of 10. Soft-Shell Clams/Steamers/Ipswich Clams (Mya arenaria) 04 of 10. Manila Clams/Steamers (Venerupis philippinarum) 05 of 10. Razor Clams/Pacific Clams (Siliqua patula) 06 of 10. 07 of 10. 08 of 10. Clam Species Guide. Quahog Varieties. Chowder, Cherrystone, Top Neck, Medium Neck, Little Neck. Mahogany. Steamer. Atlantic Razor. Manila. Geoduck. Pacific Razor. Razor Clam (Ensis directus). Alternate common names: Straight Razor Clam, Jackknife Clam. Color: Shell is brownish green. Size: Up to 10 inches; . There are thousands of different types of clams around the world. . likely to find in the US, from littlenecks and cherrystones to steamers, razor clams, and more. Some of the most frequently encountered species are easy to identify by their shell shape and . Razor clams are regulated by DMR and a few coastal towns. A clam of several species in superfamily Solenoidea, with long curved shells resembling straight razors. . The razor shell, Ensis arcuatus, now Ensis magnus. Sep 1, 2013 - A bead of sweat forms on your brow, but you've no time to wipe it. . Long and slim, the razor clam resembles a sheathed straight razor you'd .