Most welcome Terri. Thank you for the compliment Ob! I took that specimen to the dentist with me last time I went for a checkup. She was waiting for a new digital X-ray machine to arrive so I'll take it again next time and hopefully get some good images.
Browsing the Naturalis site I came across this on German heteromorphs in their collections. They say "The Aegocrioceras beds represent a rather cold phase during the Hauterivian, but, when temperatures rose again, Aegocrioceras gradually disappeared to give way to species of Crioceratites and Simbirskites.."