Classification: State Special Concern
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The CapeFear spike may reach about three inches in length. The anterior third of the shell is considerably thicker than the posterior third, and the shell appears to significantly thicken as individuals grow. The shell is distinctly wedge shaped without sexual dimorphism.The swollen posterior ridge is keeled and the posterior slope is narrow and concave. Adults have one or two radial grooves on the posterior slopes. Growth rests are clearly expressed in the shells.The periostracum of young individuals is smooth with a shiny, yellow-brown color. Green rays may be present on the posterior half of the shell. Older individuals are a dark brownish-black with roughened margins and posterior slopes.
Fuller (1972) found gravid females around the middle of June. Nothing is known about the fish hosts or ecology of the species.
General Life History For Mussels