Prismatoolithus

{{Short description|Dinosaur egg}}

{{oobox

| fossil_range = Hauterivian-Maastrichtian
~{{fossil range|130|66|latest=Paleocene}}

| image = Prismatoolithus IVPP.jpg

| image_caption = Prismatoolithus tiantaiensis eggs, Paleozoological Museum of China

| taxon = Prismatoolithus

| authority =

| subdivision_ranks = Oospecies

| subdivision = * P. caboti

• P. gebiensis
• P. hanshuiensis
• P. heyuanensis
• P. hirschi
• P. hukouensis
• P. ilekensis
• P. jenseni
• P. levis
• P. matellensis
• P. tenuis
• P. tiantaiensis
• P. trempii

}}

Prismatoolithus is an oogenus of dinosaur egg from the Cretaceous (Hauterivian-Maastrichtian) and possibly also the earliest Paleocene. They likely belonged to troodontids.Carpenter, K. 1999. Eggs, Nests, and Baby Dinosaurs: A Look at Dinosaur Reproduction (Life of the Past). Indiana University Press, Bloomington, Indiana.Mateus, I, H Mateus, MT Antunes, O Mateus, P Taquet, V Ribeiro, G Manuppella. 1998. Upper Jurassic theropod dinosaur embryos from Lourinhã (Portugal). Memórias da Academia das Ciências de Lisboa 37, 101-110