Name: Idmonarachne ‭(‬Idmon arachne‭)‬.
Phonetic: Id-mon-ah-rak-nee.
Named By: R.‭ ‬J.‭ ‬Garwood,‭ ‬J.‭ ‬A.‭ ‬Dunlop,‭ ‬P.‭ ‬A.‭ ‬Selden,‭ ‬A.‭ ‬R.‭ ‬T.‭ ‬Spencer,‭ ‬R.‭ ‬C.‭ ‬Atwood,‭ ‬N.‭ ‬T.‭ ‬Vo‭ & ‬M.‭ ‬Drakopoulos‭ ‬-‭ ‬2016.
Classification: Arthopoda,‭ ‬Chelicerata,‭ ‬Arachnida,‭ ‬Tetrapulmonata.
Species: I.‭ ‬brasieri‭ (‬type‭)‬.
Diet: Insectivore.
Size: Total body length about‭ ‬11‭ ‬millimetres long.‭ ‬Pedipalps‭ ‬4‭ ‬mm long.‭ ‬Shortest legs‭ ‬6.5‭ ‬mm,‭ ‬longest leg‭ ‬8.5‭ ‬mm.
Known locations: France.
Time period: Stephanian‭ (‬Gzhelian‭) ‬of the Carboniferous.
Fossil representation: Almost complete individual.

       Idmonarachne is one of the oldest‭ ‘‬spiders‭’ ‬that we know about,‭ ‬living on our planet some three hundred million years ago.‭ ‬Idmonarachne is not technically a true spider,‭ ‬hence the genus is not currently included with the Araneae order of arachnids.‭ ‬Idmonarachne however comes very close to being called a true spider.
       The holotype specimen of Idmonarachne is tiny,‭ ‬if it sat on your finger nail,‭ ‬the body would not extend past the tip of your finger.‭ ‬The type specimen was found preserved in sedimentary rock,‭ ‬so computerized tomography was used to reconstruct this‭ ‘‬spider‭’‬,‭ ‬allowing for perfect reconstruction without risking damaging it by trying to dig it out of the stone.‭
       The name Idmonarachne come from the ancient Greek myth of Arachne,‭ ‬a woman who challenged the Goddess Minerva to a weaving contest.‭ ‬When Minerva found that Arachne’s weaving,‭ ‬that of a mortal was as good as her own,‭ ‬a goddess could do,‭ ‬she flew into a great rage and began to beat Arachne.‭ ‬Later after Arachne’s death,‭ ‬the gods turned her into a spider so that Arachne could keep on weaving.‭ ‬Arachne’s father was called Idmon,‭ ‬and in reference to the genus name the idea is Idmonarachne is father to the true spiders.‭ ‬This is not to say the genus is specifically‭ ‘‬the‭’ ‬ancestor,‭ ‬but it represents well the group that may have spawned the true spiders of the Araneae order.

Further reading
-‭ ‬Almost a spider:‭ ‬a‭ ‬305-million-year-old fossil arachnid and spider origins.‭ ‬-‭ ‬Proceedings of the Royal Society B‭ ‬283:2016125.‭ ‬-‭ ‬R.‭ ‬J.‭ ‬Garwood,‭ ‬J.‭ ‬A.‭ ‬Dunlop,‭ ‬P.‭ ‬A.‭ ‬Selden,‭ ‬A.‭ ‬R.‭ ‬T.‭ ‬Spencer,‭ ‬R.‭ ‬C.‭ ‬Atwood,‭ ‬N.‭ ‬T.‭ ‬Vo‭ & ‬M.‭ ‬Drakopoulos‭ ‬-‭ ‬2016.


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