FANDOM


Ammonoidea

Ammonoidea2

Ammonoidea

Restoration of Ammonoidea

Characteristics
Era Paleozoic - Mesozoic
Period Devonian - Cretaceous
Living Period 400 – 65.5 Million Years Ago
Region North America, Europe, Africa
Size 23cm - 53cm long
First Appearance Chapter 106

Description

Ammonites are an extinct group of marine invertebrate animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e. octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species.

Ammonites are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods. Their fossil shells usually take the form of planispirals, although there were some helically-spiraled and non-spiraled forms (known as heteromorphs).

The name ammonite, from which the scientific term is derived, was inspired by the spiral shape of their fossilized shells, which somewhat resemble tightly coiled rams' horns. Pliny the Elder (d. 79 AD. near Pompeii) called fossils of these animals ammonis cornua ("horns of Ammon") because the Egyptian god Ammon (Amun) was typically depicted wearing ram's horns. Often the name of an ammonite genus ends in -ceras, which is Greek (κέρας) for "horn".

Shirou's History Fact

Chronology

Lighthouse arc

After Kouichi Yarai decided to head to one of the buildings on the map, Makiko Shigeno was seen holding an ammonite in her hands.

Prominent Animals
ChimeraChimera IIErnestMr. Lucky
Extinct Animals
AmmonoideaAncient TicksAnomalochelysArctodus SimusArgentavisAlectroenas NitidissimaAmbulocetusAndrewsarchus Mongoliensis ArsinoitheriumBasilosaurusBos PrimigeniusCanis DirusChalicotheriumCheirolepisCrassigyrinusCyclotosaurusDiatrymaEntelodonEumegamysEusmilusEusthenopteronGerrothoraxGigantopithecusGlyptodonHarpagornis MooreiHoloptychiusHyaenodonHypsognathusHyracotheriumIchthyornisIctitheriumIschyromysKannemeyeriaLystrosaurusMacraucheniaMammuthus ImperatorMegaladapis EdwardsiMeganeura MonyiMegatherium AmericanumMeiolaniaMesohippusMoeritheriumNecrolemurNemegtbaatar GobiensisNotharctus ParaceratheriumPristichampusPropleopusPtilodus RodhocetusSmilodonTitanis WalleriTriadobatrachusUnknown Extinct Animals

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.