Pentremites
noun
Pen·tre·mi·tes
ˌpen‧trəˈmīˌtēz
: a genus (the type of the family Pentremitidae) comprising Mississippian blastoid echinoderms having an ovate or pyriform calyx with five ambulacral areas suggestive of petals
Word History
Etymology
New Latin, from penta- (from Greek) + Greek trēma hole + New Latin -ites