Megarachne

Meg-ah-rak-ney.
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Emily Green

Paleobotanist

Emily Green brings the ancient world of plants to life through her insightful research and engaging writing. Her expertise lies in examining how prehistoric vegetation influenced climate patterns and animal evolution.

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Name

Megarachne (Large spider).

Phonetic

Meg-ah-rak-ney.

Named By

Mario A. H�nicken - 1980.

Classification

Arthropoda, Merostomata, Eurypterida, Hibbertopteroidea, Mycteroptidae.

Diet

Carnivore.

Species

M. servinei

Size

Reconstructed as a eurypterid, length estimated to be about 54 centimetres long.

Known locations

South America, Argentina.

Time Period

Pennsylvanian of the Carboniferous.

Fossil representation

Two specimens of partial remains.

In Depth

       To begin we need to be clear about one thing: Megarachne was never a spider. Forget what you may have seen in the BBC documentary ‘Walking With Monsters, although in their defence they were following the original fossil study during production, and did change the name to Mesothelae for broadcast to try and prevent confusion. Also this means that previous reconstructions as seen in museums for twenty-five years between its discovery and re-examination have unfortunately been incorrect. Still, this is not the first time that an extinct creature has been incorrectly interpreted, nor is likely the last.

       When first discovered the specimen was thought to represent a spider but in 2005, the specimen was re-examined along with a second specimen by Paul Seldon, Jos� Corronca and Mario H�nicken and actually found to be a

Further Reading

– A giant fossil spider (Megarachne servinei) from Bajo de V�liz, Upper Carboniferous, Argentina – Boletin de la Academia Nacional de Ciencias, C�rdoba, Argentina 53: 317–341. – Mario A. H�nicken – 1980. – The true identity of the supposed giant fossil spider Megarachne. – Biology Letters 1 (1): 44–48. – Paul A. Selden, Jos� A. Corronca & Mario A. H�nicken – 2005.

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