fusulina
noun
fu·su·li·na
ˌfyüzəˈlīnə,
-lēnə
1
capitalized : a genus (the type of the family Fusulinidae) of large fossil spindle-shaped foraminiferans having a test with 4-layered walls and deeply folded septa and serving as an index fossil in various Lower and Middle Pennsylvanian rocks
2
plural -s : an animal or fossil of Fusulina or a related genus
Word History
Etymology
New Latin, from Latin fusus spindle + -ulus (diminutive suffix) + New Latin -ina