Aspidella is an Ediacaran disk shaped fossil. The Ediacaran Period is the last geological period of the Neoproterozoic Era, just before the Cambrian. ...

In 1872 Elkanah Billings discovered Aspidella terranovica fossils for the first time in Duckworth Street, St Johns, Newfoundland. They were in a Precambrian outcrop of black shale. Billings was the head paleontologist with the Geological Survey in Canada at the time. Even so his findings were disputed by Charles Doolittle Walcott, an American, who claimed that the shapes in the rocks were concretions formed inorganically. Other explanations were that the circles were gas escape bubbles, or fakes planted by God to lure those with little faith into error. They were the first Ediacaran or Vendian fossils described by a scientist. 1872 (MDCCCLXXII) was a leap year starting on Monday (see link for calendar) of the Gregorian calendar or a leap year starting on Wednesday of the 12-day-slower Julian calendar. ... Nickname: The City of Legends Motto: Avancez (Go forward) Coordinates: Country Canada Province Newfoundland and Labrador Established August 5, 1583 by Royal Charter of Queen Elizabeth I City Mayor Andy Wells Governing body St. ... Newfoundland —   (stress on final syllable; for mispronunciations, see Newfoundland travel guide from Wikitravel)— (French: , Irish: ) is a large island off the east coast of North America, and the most populous part of the Canadian province of Newfoundland and Labrador. ... The Precambrian is an informal name for the eons of the geologic timescale that came before the current Phanerozoic eon. ... Shale Shale is a fine-grained sedimentary rock whose original constituents were clays or muds. ... The Ediacaran biota (also known as Ediacaran fauna(s), Vendian biota, Vendian forms, Vendian fauna(s), Vendobionta or Vendozoa) are a group of ancient lifeforms that are found in rocks of the Ediacaran Period, a bit older than the Cambrian faunas that represent the oldest (shelled) fossils of classical paleontology. ...

For decades Aspidella and its partner fossils were not considered to be Precambrian life forms. This lasted till the work of Reg Sprigg who discovered the Ediacara Hills fossils. Fossils were found in many other parts of the world in rocks of about the same age and became accepted as genuine remains of life forms.

Other places where Aspidella are found is the Bona Vista Peninsula and Mistaken Point in Newfoundland, and the Twitya formation in British Columbia. Motto: Splendor Sine Occasu (Latin: Splendour without diminishment) Official languages English de facto (none stated in law) Flower Pacific dogwood Tree Western Redcedar Bird Stellers Jay Capital Victoria Largest city Vancouver Lieutenant-Governor Iona Campagnolo Premier Gordon Campbell (BC Liberal) Parliamentary representation  - House seats  - Senate seats 36 6 Area...

The diameter of Apsidella varies from 1 to 180 cm but is usually under 10 cm.

Antiquity of Aspidella ranges from 610 million years ago to 555 mya.

Different morphological forms have been called Ediacaria or Spriggia. In Newfoundland it takes the form of ellipses, from 3 to 8cm long and 1 to 4 cm wide with a central pimple. The pimple is surrounded by sharp ridge edged concentric rings. The disk is a holdfast, with the pimple being where the stalk of the animal was connected. A frond was connected to the stalk, and this frond is what was called Spriggina.

Aspidella has also been used to name fungi of the Amanita genus. The genus Amanita contains about 600 species of agarics and contains some of the most toxic known mushrooms, found worldwide. ...