3 articles
Ammonites of Asia
Ammonites of Asia covers ammonite faunas of the Tethyan, Boreal, and Pacific marine realms across Asia, from the Himalaya and Kachchh to Siberia, Iran, and Japan.
Catanduanes
Catanduanes: island province in the Bicol Region, Philippines, east of Camarines Sur; capital Virac, 11 municipalities, abaca capital, typhoon-prone, site of the Philippines' first described Cretaceous ammonites.
Polyptychoceras
Polyptychoceras (Yabe, 1927), type species P. pseudogaultinum, a heteromorph ammonite of the Diplomoceratidae from the Santonian–Campanian of Hokkaido, Sakhalin and beyond, with a paper-clip shell of parallel shafts joined by U-shaped tubes.