Pentremites
noun
Pen·tre·mi·tes
| \ ˌpen‧trəˈmīˌtēz\
Definition of Pentremites
: 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
Keep scrolling for more