ammonite

From French ammonite, from Latin Ammōnis (cornū) (“horn of Ammon”), as it was called by Pliny the Elder in reference to coiling ram horns used to symbolise the Egyptian god Amun. Equivalent to Ammon + -ite.

Ammonites floated through the world's shallow oceans for more than three hundred million years, and their fossilized shells turn up all around the world.

2014, Elizabeth Kolbert, The Sixth Extinction: An Unnatural History, Picador, →ISBN, page 83:

(paleontology) Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal.


ammonoid

Although the extinct externally shelled cephalopods ammonoids have an extensive fossil record, their soft tissues are very poorly known and, like extinct and living nautiloids, they are largely presumed to not have possessed an ink sac.

2017 August 9, Mark Carnall, The Guardian:

An extinct cephalopod of the subclass †Ammonoidea (including ammonites).


ceratitid

(zoology) Any extinct ammonite of the order Ceratitida.


baculite

The shell of a baculite was quite simply straight—an unexpected throwback to the early days of cephalopods.

2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 89:

(paleontology) Any of the genus †Baculites of extinct cephalopod heteromorph ammonites.


snakestone

en-noun

snakestone (countable and uncountable, plural snakestones)

(paleontology) An ammonite (because of its coiled form).


lituite

(paleontology) Any ammonite of the genus †Lituites, found in the Cretaceous formation.


turrilite

From Latin turris (“tower”) + -lite or directly from translingual †Turrilites.

(paleontology) Any fossil ammonite of the genus †Turrilites, the shell forming an open spiral with the later whorls separate.


goniatite

Any member of the extinct Goniatitida, a taxonomic order of ammonites.


acanthoceratid

(zoology) Any member of the Acanthoceratidae.


adrianitid

(zoology) Any of the extinct ammonites in the family Adrianitidae.


amaltheid

(zoology) Any of the extinct ammonites in the family Amaltheidae.


xenoceltitid

(zoology) Any ammonite in the family Xenoceltitidae.


xenodiscid

(zoology) Any ammonite in the family Xenodiscidae.


ancyloceratid

(zoology) Any ammonite in the family Ancyloceratidae.


anisoceratid

(zoology) Any member of the family Anisoceratidae of extinct ammonite cephalopods.


anthracoceratid

(zoology) Any of the extinct ammonids in the family Anthracoceratidae.


araxoceratid

(zoology) Any any of the extinct ammonites in the family Araxoceratidae.


arietitid

(zoology) Any of the extinct ammonites in the family Arietitidae.


aspidoceratid

(zoology) Any of the extinct ammonites in the family Aspidoceratidae.


baculitid

(zoology) Any of the extinct ammonites in the family Baculitidae.


berriasellid

(zoology) Any ammonite in the family Berriasellidae, now considered to be the subfamily Berriasellinae of the Neocomitidae (as the Neocomitinae, the Neocomitidae was formerly considered to be a subfamily of the Berriasellidae).


brancoceratid

(zoology) Any of the extinct ammonites in the family Brancoceratidae.


cheiloceratid

(zoology) Any Ammonite in the family Cheiloceratidae.


clionitid

(zoology) Any ammonite in the family Clionitidae.


coilopoceratid

(zoology) Any ammonite in the family Coilopoceratidae.


collignoniceratid

(zoology) Any ammonite in the family Collignoniceratidae.


cravenoceratid

(zoology) Any ammonite in the family Cravenoceratidae.


cyclolobid

Any ammonite in the family Cyclolobidae.


desmoceratid

(zoology) Any ammonite in the family Desmoceratidae.


dimeroceratid

(zoology) Any ammonite in the family Dimeroceratidae.


dimorphoceratid

(zoology) Any ammonite in the family Dimorphoceratidae.


daraelitid

(zoology) Any ammonite in the family Daraelitidae.


engonoceratid

(zoology) Any ammonite in the family Engonoceratidae.


gastrioceratid

(zoology) Any ammonite in the family Gastrioceratidae.


gaudryceratid

(zoology) Any ammonite in the family Gaudryceratidae.


glaphyritid

(zoology) Any ammonite in the family Glaphyritidae.


gonioloboceratid

(zoology) Any ammonite in the family Gonioloboceratidae.


goniatitid

/ˌɡəʊniəˈtaɪtɪd/

(zoology) Any ammonite in the family Goniatitidae.


gymnitid

(zoology) Any ammonite in the family Gymnitidae.


haloritid

(zoology) Any ammonite in the family Haloritidae.


haploceratid

(zoology) Any ammonite in the family Haploceratidae.


hildoceratid

(zoology) Any ammonite in the family Hildoceratidae.


homoceratid

(zoology) Any member of the family †Homoceratidae of extinct ammonites.


hoplitid

(zoology) Any ammonite in the family Hoplitidae.


juraphyllitid

(zoology) Any ammonite in the family Juraphyllitidae.


liparoceratid

(zoology) Any ammonite in the family Liparoceratidae.


marathonitid

(zoology) Any ammonite in the family Marathonitidae.


lytoceratid

(paleontology) Any member of the family Lytoceratidae of ammonites.

(paleontology, dated) Any member of the order Lytoceratida (now the suborder Lytoceratina).


medlicottiid

(zoology) Any ammonite in the family Medlicottiidae.


ophiceratid

(zoology) Any member of the family †Ophiceratidae of extinct ammonite cephalopods.


oxynoticeratid

(zoology) Any ammonite in the family Oxynoticeratidae.


otoceratid

(zoology) Any ammonite in the family Otoceratidae.


nostoceratid

(zoology) Any ammonite in the family Nostoceratidae.


pachydiscid

(zoology) Any in the family Pachydiscidae of extinct ammonites.


otoitid

(zoology) Any ammonite in the family Otoitidae.


paragastrioceratid

(zoology) Any ammonite in the family Paragastrioceratidae.


parahoplitid

(zoology) Any ammonite in the family Parahoplitidae.


pericyclid

(zoology) Any ammonite in the family Pericyclidae.


perisphinctid

(zoology) Any ammonite in the family Perisphinctidae.


perrinitid

(zoology) Any ammonite in the family Perrinitidae.


phylloceratid

(zoology) Any ammonite in the family Phylloceratidae.


placenticeratid

(zoology) Any ammonite in the family Placenticeratidae.


popanoceratid

(zoology) Any ammonite in the family Popanoceratidae.


prionoceratid

(zoology) Any ammonite in the family Prionoceratidae.


prolobitid

(zoology) Any ammonite in the family Prolobitidae.


prodromitid

(zoology) Any ammonite in the family Prodromitidae.


pseudotirolitid

(zoology) Any ammonite in the family Pseudotirolitidae.


ptychitid

(zoology) Any ammonite in the family Ptychitidae.


pseudohaloritid

(zoology) Any ammonite in the family Pseudohaloritidae.


schloenbachiid

(zoology) Any ammonite in the family Schloenbachiidae.


ussuritid

(zoology) Any of the extinct ammonites in the family Ussuritidae.


vascoceratid

(zoology) Any ammonite in the family Vascoceratidae.


shumarditid

(zoology) Any member of the †Shumarditidae, extinct shelled cephalopods.


stephanoceratid

(zoology) Any ammonite in the family Stephanoceratidae.


strigoceratid

(zoology) Any ammonite in the family Strigoceratidae.


tetragonitid

(zoology) Any ammonite in the family Tetragonitidae.


thalassoceratid

(zoology) Any ammonite in the family Thalassoceratidae.


tissotiid

(zoology) Any ammonite in the family Tissotiidae.


tornoceratid

(zoology) Any ammonite in the family Tornoceratidae.


trachyceratid

(zoology) Any extinct ammonite in the family Trachyceratidae.


tropitid

(zoology) Any ammonite in the family Tropitidae.


turrilitid

(zoology) Any member of the family Turrilitidae of ammonites.


cornu ammonis

From Latin cornū Ammōnis (“Ammon's horn”). See ammonite.

(paleontology, obsolete) A fossil shell, curved like a ram's horn; an ammonite.


neoammonite

Any ammonite (Ammonoidea) of the Jurassic period, descended from Psiloceras, the sole surviving ammonite genus of the Triassic–Jurassic extinction event.


psiloceratacean

Many British stratigraphers have historically used the first occurrence of the ammonite Psiloceras planorbis to indicate the base of the Jurassic, but elsewhere in Europe two other psiloceratacean ammonites appear before P.

2016 January 21, “The Oldest Jurassic Dinosaur: A Basal Neotheropod from the Hettangian of Great Britain”, in PLOS ONE, →DOI:

Any ammonoid cephalopod of the superfamily Psilocerataceae.


virgatosphinctin

Any ammonite of the genus Virgatosphinctes


cadoceratid

Any fossil ammonite of the family Cardioceratidae


cardioceratid

Any ammonite in the family Cardioceratidae.


echioceratid

Any ammonite of the family Echioceratidae of serpenticone ammonites.


oxycone

The quickest and nimblest were probably the oxycones, throwing themselves through the water like discuses.

2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 87:

(paleontology, malacology) A type of ammonoid with a slim, disk-shaped (oxyconic) shell.


scaphite

Landman concluded that scaphites probably didn't have muscular arms or a strong siphon. They didn't need them […].

2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 94:

An extinct ammonoid of the genus Scaphites.


ammonitid

(paleontology) Any ammonite of the order Ammonitida.


euomphaloceratine

(paleontology) An ammonite in the acanthoceratid subfamily Euomphaloceratinae.


kossmaticeratid

(paleontology) Any member of the family Kossmaticeratidae of ammonites.