$2, $3 dagi (joriy) koʻrinishi

Fontannesia — Yura davrida yashagan ammonoidlarga mansub boshoyoqli mollyuskalar turkumi.

  • Arkell et al., 1957., Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L, Ammonoiea. Geological Society of America and University of Kansas Press.