Karamites is an extinct cephalopoda genus belonging to the Ammonoidea and included in the hoplitacean family Placenticeratidae

Placenticeratidae

The Placenticeratidae is a family of mostly Late Cretaceous ammonites included in the superfamily Hoplitaceae, derived from the Engonoceratidae by an increase in suture complexity....

.

Karamites lived during the latest Albian (late early Cretaceous), derived from Semenoviceras. It is the typical form for Central Asia where it occurs with members of the Hoplitidae

Hoplitidae

The Hoplitidae is a family of Cretaceous ammonites that lived during the middle of the period from the late Aptian to the Cenomanian. They are part of the superfamily Hoplitaceae....

, e.g. Anahoplites

Anahoplites

Anahoplites is an extinct genus of cephalopod belonging to the Ammonite subclass....

. It is also the direct ancestor of Late Cretaceous placenticeratids such as Placenticeras

Placenticeras

Placenticeras is an ammonite genus from the Late Cretaceous. Its fossils have been found in Asia, Europe, North and South America.-Taxonomy:...

and Hypengonoceras.

References

• Marcinowski, Ryszard. Change within ammonite assemblages from Mangyshlak mountains (western Kasakhstan) during the mid-Cretaceous transgression. Institute of Geology of the University of Warsaw. http://www.geologie.ac.at/filestore/download/BR0046_085_A.pdf
• Cooper, Michael R.; Owen, Hugh G. 2011. The phylogeny and classification of primitive Placenticeratidae (Cretaceous Hoplitina, Hoplitoidea). http://www.ingentaconnect.com/content/schweiz/njbgeol/2011/00000260/00000003/art00008