Temporal range: Campanian
The shell of Bostrychoceras begins as a tightly wound helical spire, like that of Nostoceras, from which hangs a U or J shaped body chamber, at least in the adult. The shell is covered with dense, strong, but un-flaired, ribs that are commonly sinuous and oblique. May nor may not have strong constrictions.
Cretaceous of Nigeria, Peru, South Africa, Spain and the United States 
- Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
- Ammonoid Paleobiology (Topics in Geobiology) by Neil H. Landman, Kazushige Tanabe, and Richard Arnold Davis
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