Perisphinctes
noun
Peri·sphinc·tes
ˌperəˈsfiŋ(k)(ˌ)tēz
: a genus (the type of the family Perisphinctidae) comprising discoidal ammonites having bifurcating ribs not interrupted on the ventral side and being characteristic of the Upper Jurassic
perisphinctoid adjective
¦⸗⸗¦sfiŋ(k)ˌtȯid
Word History
Etymology
New Latin, from peri- + -sphinctes (from Greek sphinktos tightly bound, from sphingein to bind fast)