Middle Jurassic ammonoid jaws (anaptychi and rhynchaptychi) from Dagestan, North Caucasus, Russia

Cephalopods present and past

Jost Wiedmann, Jürgen Kullmann · 1988 · 504 citations

Life Sciences, Biology, Zoology +6

The jaw apparatus of Recent Nautilus and its palaeontological implications

W. Bruce Saunders, Claude Spinosa, Curt Teichert et al. · Biodiversity Heritage Library (Smithsonian Institution) · 1978 · 70 citations · Full text

Dentistry, Anatomy, Paleontology +14

The evolution and geography of Jurassic ammonoids

Kevin Page · Proceedings of the Geologists Association · 2008 · 63 citations

Natural Sciences, Paleontology, Zoology +12

Phylogeny of the aptychi-possessing Neoammonoidea (Aptychophora nov., Cephalopoda)

Théo Engeser, Helmut Keupp · Lethaia · 2002 · 56 citations

Life Sciences, Biology, Evolutionary Biology +9

Double function of aptychi (Ammonoidea) as jaw elements and opercula

Ulrich Lehmann, Cyprian Kulicki · Lethaia · 1990 · 52 citations

Life Sciences, Anatomy, Zoology +14