{"product_id":"myl-009-250-australian-fossil-ammonite-myloceras-ammonoide","title":"Australian fossil ammonite (\"Myloceras ammonoide\")","description":"\u003cp data-end=\"451\" data-start=\"0\"\u003e\u003cem data-end=\"22\" data-start=\"0\"\u003eMyloceras ammonoides\u003c\/em\u003e (Millstone Horn Ammonite) is an extinct marine cephalopod from Australia’s Cretaceous inland seas. This species is dated to approximately 100–113 million years ago (Cretaceous) and is known from the Allaru Formation, Currane Station, Ilfracombe, Central West Queensland. The specimen represents a nektonic mollusc that swam within the warm shallow waters of the Eromanga Sea system.\u003c\/p\u003e\n\u003cp data-end=\"942\" data-start=\"453\"\u003eOriginally described by Dr Frederick W Whitehouse in 1926, \u003cem data-end=\"535\" data-start=\"513\"\u003eMyloceras ammonoides\u003c\/em\u003e was based on fossil shells discovered near Port Douglas and Dalhousie Springs. It belongs to the heteromorph ammonites, an unusual group distinguished by shells that became partially uncoiled rather than retaining the tightly coiled form typical of most ammonites. In \u003cem data-end=\"819\" data-start=\"804\"\u003eM. ammonoides\u003c\/em\u003e, the shell commonly developed a straight shaft extending beyond the shell opening, terminating in a recurved spiral tip.\u003c\/p\u003e\n\u003cp data-end=\"1478\" data-start=\"944\"\u003eThe genus name \u003cem data-end=\"970\" data-start=\"959\"\u003eMyloceras\u003c\/em\u003e combines the Greek \u003cem data-end=\"997\" data-start=\"990\"\u003emylos\u003c\/em\u003e (millstone) and \u003cem data-end=\"1021\" data-start=\"1014\"\u003ekeras\u003c\/em\u003e (horn), referring to the distinctive combination of coiled and extended shell forms. \u003cem data-end=\"1118\" data-start=\"1107\"\u003eMyloceras\u003c\/em\u003e is closely related to the heteromorph ammonite \u003cem data-end=\"1177\" data-start=\"1166\"\u003eLabeceras\u003c\/em\u003e, and fossils of both genera are often recovered from the same deposits. Some researchers have suggested the two may represent male and female forms of a single lineage, with \u003cem data-end=\"1363\" data-start=\"1352\"\u003eMyloceras\u003c\/em\u003e interpreted as the larger-shelled macroconch form. At present, both genera continue to be recognised separately.\u003c\/p\u003e\n\u003cp data-end=\"1797\" data-start=\"1480\"\u003eModern nautiluses are distant living relatives of ammonites and provide insight into the buoyant, jet-propelled lifestyle these animals likely employed. Unlike modern nautiluses, ammonites such as \u003cem data-end=\"1688\" data-start=\"1677\"\u003eMyloceras\u003c\/em\u003e possessed far more varied shell shapes, reflecting a wide range of ecological adaptations in ancient seas.\u003c\/p\u003e\n\u003cp data-end=\"1924\" data-start=\"1799\"\u003eEach specimen is carefully prepared and represents a unique fossil with natural variation in preservation and completeness.\u003c\/p\u003e\n\u003cp data-end=\"2214\" data-start=\"1926\"\u003e\u003cstrong data-end=\"1942\" data-start=\"1926\"\u003eKey features\u003c\/strong\u003e\u003cbr data-end=\"1945\" data-start=\"1942\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"2214\" data-start=\"1926\"\u003eAuthentic fossil specimen\u003c\/li\u003e\n\u003cli data-end=\"2214\" data-start=\"1926\"\u003eTaxon: \u003cem data-end=\"2002\" data-start=\"1980\"\u003eMyloceras ammonoides\u003c\/em\u003e (ammonite, Mollusca, Cephalopoda)\u003c\/li\u003e\n\u003cli data-end=\"2214\" data-start=\"1926\"\u003eAge: 100–113 million years (Cretaceous)\u003c\/li\u003e\n\u003cli data-end=\"2214\" data-start=\"1926\"\u003eOrigin: Allaru Formation, Eromanga Sea system, Queensland, Australia\u003c\/li\u003e\n\u003cli data-end=\"2214\" data-start=\"1926\"\u003eMuseum-prepared specimen\u003c\/li\u003e\n\u003cli data-end=\"2214\" data-start=\"1926\"\u003eNatural variation in preservation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"2503\" data-start=\"2216\"\u003e\u003cstrong data-end=\"2224\" data-start=\"2216\"\u003eNote\u003c\/strong\u003e\u003cbr data-end=\"2227\" data-start=\"2224\"\u003eAs a natural fossil, variations in colour, texture and completeness are expected and add to the uniqueness of each specimen. All fossils sold by the Museum are common and widely represented and are not of scientific research value.\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"2503\" data-start=\"2216\"\u003eShipping is only available within Australia.\u003c\/p\u003e","brand":"Australian Age of Dinosaurs Museum Shop","offers":[{"title":"Default Title","offer_id":48928735232228,"sku":"MYL-009-250","price":300.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/8838\/5673\/files\/MYL-009-250_1.jpg?v=1778809883","url":"https:\/\/australianageofdinosaursmuseumshop.com\/products\/myl-009-250-australian-fossil-ammonite-myloceras-ammonoide","provider":"Australian Age of Dinosaurs Museum Shop","version":"1.0","type":"link"}