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  • Dactylioceras Commune 133mm
  • Dactylioceras Commune 133mm

Dactylioceras Commune 133mm


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Dactylioceras Commune ammonite contained within the naturally discovered pebble stone, with another smaller umbilicus phragmacone, read the fuller description below...

Genus: Dactylioceras Commune Ammonite, described by Hyatt circa 1867.
Geological Origin: Upper Lias, Alum shale, Portmulgrave, Nr. Whitby, N.Yorks, England.
Age: Mesozoic era, Jurassic period, Toarcian stage 183 to 174 million years ago.

Nodule measurement.
Width: 13.5 cm
Height: 10.0 cm
depth: 4.8 cm

larger Umbilicus measurement.
Width: 7.5 cm
Height: 6.6 cm
depth: 1.5 cm

Smaller Umbilicus measurement
Width: 2.5 cm
Height: 2.2 cm
depth: 0.6 cm

Approximate weight: 0,653 g

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A fine example of a great British classic dactylioceras commune ammonite, two specimens reside within the one split stone nodule, once part of the silty seabed where the extant cephalopods umbilicus (shells) would reside post their demise, to be covered over and eventually harden into the fossil time capsules from a prehistoric Jurassic period of England. The superb duo coupling have been exquisitely and perfectly cleaned and prepped out of the limestone shales, so each defining point of both are fully exposed, seemingly as though one may have just lifted the ancient shells from a sandy beach.

The larger umbilicus has an excellent mouth border still intact, this is a rarity. The mouth aperture flares out at this point creating a trumpet bowl effect, which is very attractive. Coupled with a second specimen micro conch this is a particularly attractive novice and aficionado collection piece. The smaller umbilicus has the iridescence of iron pyrite, fools gold, this contrast with the darker chocolate brown of the larger ribbed shell, which is good enough to eat from a collector point of view!

Alpheus Hyatt (April 5, 1838 – January 15, 1902) was an American zoologist and palaeontologist >

Additional Information

Age Jurassic
Origin England
Colour Black