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Aegocrioceras raricostatum

Order

Suborder

Superfamily

Family

Subfamily

Genus

Ammonoidea

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Stage

Zone

Subzone

Horizon

Hauterivian

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Continent

Country

County

City

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Size at widest points: 150 mm.
Planispiral heteromorphic genus. Strong simple ribs distinctly spaced.

Aegocrioceras capricornu can be distinguished by its loose coiling and the very slow growth of the width of the whorl.

1975 . RAWSON P. F.

Lower Cretaceous Ammonites from North-East England: The Hauterivian Heteromorph Aegocrioceras [Bulletin of the British Museum, Natural History (Vol. 26, No. 4)] - Natural History Museum of London

p. 328, pl. 11

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Created by Guillaume on 28/12/2016 - 22:07:10
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