ammonite


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ammonite

(ăm`ənīt), one of a type of extinct marine cephalopodcephalopod
, member of the class Cephalopoda, the most highly organized group of mollusks (phylum Mollusca), and including the squids, octopuses, cuttlefish, and nautiluses. The class as a whole has become adapted for a free-swimming existence.
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 mollusk, related to the nautilusnautilus
or chambered nautilus,
cephalopod mollusk belonging to the sole surviving genus (Nautilus) of a subclass that flourished 200 million years ago, known as the nautiloids.
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 and resembling it in having an elaborately coiled and chambered shell. Unlike the interiors of nautilus shells, the chambers of ammonite shells display intricately shaped septa and sutures. The type included numerous species, which were widely distributed during the Mesozoic era, about 200 million years ago. Ammonites are classified in the phylum MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
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, class Cephalopoda, subclass Ammonoidea.

ammonite

[′a·mə‚nīt]
(materials)
An explosive containing 70-95% ammonium nitrate.
(paleontology)
A fossil shell of the cephalopod order Ammonoidea.

ammonite

1
1. any extinct marine cephalopod mollusc of the order Ammonoidea, which were common in Mesozoic times and generally had a coiled partitioned shell. Their closest modern relative is the pearly nautilus
2. the shell of any of these animals, commonly occurring as a fossil

ammonite

2
1. an explosive consisting mainly of ammonium nitrate with smaller amounts of other substances, such as TNT
2. a nitrogenous fertilizer made from animal wastes
References in periodicals archive ?
Jurassic ammonite morphotypes as water-depth indicator of Tethys-Himalaya sea // Acta of Palaeontological Sinica.
Mayor (2000: 275) inferred that the fossils referred to by Pliny were iridescent ammonite fossils.
Campanian ammonites from the Upper Cretaceous Gober Chalk of Lamar County, Texas.
It was identified as Ammonite by Cross in 1976 (according to L.
Notably Lot's daughters have sons, although their descendants, the Moabites and Ammonites, became persistent enemies of Israel.
We quickly met success along the beaches at Lyme Regis and nearby Charmouth, finding dozens of ammonites, pieces of belemnites, bits of ichthyosaur rib and sea lilies, and even a globelike sea urchin.
The fossil is of a previously unknown creature which is a type of Ammonite," the Daily Mail quoted a museum spokesman as saying.
There was an ammonite fossil bigger than a dustbin lid and a 200 million-year-old slab of rippled rock from Cheshire, once a mudflat, with the footprint - no bigger than a small hand - of a tiny dinosaur.
Return of trucks with explosive ammonite and weapon belonging to the Kyrgyz Interior Ministry by Uzbekistan was discussed at the meeting.
The explosions at the privately-owned "Midzhur" started at Wednesday night, and are still continuing as there were 10 tons of ammonite in its storage facilities as well as mines and other ammunition.
But three inches across, its perfect swirls etched with pristine clarity onto pearly white limestone, this ammonite is the highlight of our tour of the fossils sprinkled across the buildings of Liverpool.
No Ammonite or Moabite shall be admitted into the congregation of the Lord; none of their descendants, even in the tenth generation, shall ever be admitted into the congregation of the Lord .