Phlyctiderma verrilli, Verrill's diplodon[1][2] or inflated diplodon,[3] is a species of bivalve mollusc in the family Ungulinidae.

[1] It can be found along the Atlantic coast of North America, ranging from Massachusetts to North Carolina[2] and Gulf of Mexico.

[1] The shell diameter can reach 2 cm (0.79 in).

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