Book: Sur Un Aptychus De Sonninia Du Bajocien Des Environs De Nancy (1900) (French Edition) - Kessinger Publishing, LLC
Digital Music Track: Aptychus - Phrantique
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ammonite aptychi: how to transform a jaw into an operculum? - The ...
The association of aptychi with ammonite shells is a long recognized fact. But since ... aptychus could have served a double function as ajaw and an operculum.
A Devonian Aptychus (Cephalopoda) from Alabama - Jstor
This is the first report of a Devonian aptychus in the United States and only the fourth report of aptychi in the Paleozoic of North America. INTRODUCTION.
Aptychus - Merriam-Webster Online
a shelly plate usually of two pieces found in ammonites and regarded as an operculum. Origin of APTYCHUS. New Latin, from 2a- + Greek ptychē fold — more ...
Spathiocaris - Jstor
0022-3360/94/0068-0671 $03.00. METHODS FOR DISTINGUISHING CARBONIZED SPECIMENS. OF THE PRESUMED CEPHALOPOD APTYCHUS SIDETES.
First three-dimensionally preserved in situ record of an ...
Nov 11, 2009 ... The function of the aptychus is discussed in general, and an ... The formation of strongly calcified aptychi in aspidoceratids and some oppeliid ...
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