Lucina pensylvanica, commonly known as the Pennsylvania lucine,[2] is a species of bivalve mollusc in the family Lucinidae.

He spelt the specific name incorrectly, with only a single "n" in the first syllable, but by the law of priority laid down in the International Code of Zoological Nomenclature, the original spelling is retained even if it contained an error.

The valves are largely white, but remnants of the brownish periostracum may remain in the form of calcified scales.

[3] These scales contain calcareous granules and have a thin layer of prismatic aragonite on their ventral surfaces, which gives an unusual flexibility to the margin of the valve.

[5] Like other members of the Lucinidae, Lucina pensylvanica possesses chemosymbiotic, sulphur-oxidizing bacteria housed in bacteriocytes in their gills.