Aneumastus Carolinianus Guide
Credit: Meredith Tyree
  1. Striae uniseriate becoming biseriate at margin
  2. Central area an irregular stauros
  3. Striae unevenly shortened at center valve
  4. Apices acutely rounded

Valves are lanceolate with acutely rounded apices. The central area is transversely expanded, forming an irregular stauros. The raphe is undulate. Striae are radiate throughout, becoming most strongly radiate at the apices. Striae are uniseriate, except at the margins, where they become biseriate.