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Top thirteen fossil stories of 2016 | Earth Archives
The soft-bodied Tullimonstrum gregarium has confounded scientists since its discovery in 1966 in Carboniferous sediments from Mazon Creek at Illinois. It had a body like a cuttlefish, complete with a little pair of fins, a lengthy proboscis with jaws at the end and eyes mounted on stalks.
The animal was sometimes classified as a swimming mollusk and sometimes as a creature unrelated to any other animal group alive today. However its real identity has now been revealed. Tullimonstrum – the “Tully Monster” for short – was not an invertebrate but rather an ancient fish related to modern jawless fish like lampreys and hagfishes.
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https://en.wikipedia.org/wiki/Hagfish
https://en.wikipedia.org/wiki/Lamprey
The soft-bodied Tullimonstrum gregarium has confounded scientists since its discovery in 1966 in Carboniferous sediments from Mazon Creek at Illinois. It had a body like a cuttlefish, complete with a little pair of fins, a lengthy proboscis with jaws at the end and eyes mounted on stalks.
The animal was sometimes classified as a swimming mollusk and sometimes as a creature unrelated to any other animal group alive today. However its real identity has now been revealed. Tullimonstrum – the “Tully Monster” for short – was not an invertebrate but rather an ancient fish related to modern jawless fish like lampreys and hagfishes.
=============================================
https://en.wikipedia.org/wiki/Hagfish
https://en.wikipedia.org/wiki/Lamprey