Lower Cretaceous ammonites from the Neuquén Basin, Argentina: a Hauterivian Olcostephanus fauna

M. B. Aguirre-Urreta, and P. F. Rawson

2001

Article

Cretaceous Research 22(6):763-778

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Taxa discussed in this work:

• Holcostephanus leanzai
• Olcostephanus (Jeannoticeras)
• Olcostephanus (Jeannoticeras) agrioensis
• Olcostephanus (Olcostephanus) boesei
• Olcostephanus (Olcostephanus) laticosta
• Olcostephanus (Olcostephanus) variegatus

Taxonomy:

• Olcostephanus (Olcostephanus) laticosta belongs to Olcostephanus (Olcostephanus) - Aguirre-Urreta and R (2001)
• Holcostephanus leanzai belongs to Olcostephanus (Olcostephanus) laticosta - Aguirre-Urreta and R (2001)
• Olcostephanus (Olcostephanus) boesei belongs to Olcostephanus (Olcostephanus) - Aguirre-Urreta and R (2001)
• Olcostephanus (Olcostephanus) variegatus belongs to Olcostephanus (Olcostephanus) - Aguirre-Urreta and R (2001)
• Olcostephanus (Jeannoticeras) belongs to Ammonites (Olcostephanus) - Aguirre-Urreta and R (2001)
• Olcostephanus (Jeannoticeras) agrioensis belongs to Olcostephanus (Jeannoticeras) - Aguirre-Urreta and R (2001)
• Olcostephanus (Olcostephanus) belongs to Ammonites (Olcostephanus) - Aguirre-Urreta and R (2001)