Madagascarchaea gracilicollis

{{Short description|Species of spider}}

{{Speciesbox

| image =

| taxon = Madagascarchaea gracilicollis

| authority = (Millot, 1948)

| synonyms =

{{Species list

|Archaea gracilicollis|Millot, 1948

|Eriauchenius gracilicollis|(Millot, 1948)

}}

| synonyms_ref =

| range_map = Distribution.eriauchenius.gracilicollis.1.png

}}

Madagascarchaea gracilicollis is a member of the family Archaeidae,{{citation |mode=cs1 |title=Taxon details Madagascarchaea gracilicollis (Millot, 1948) |work=World Spider Catalog |publisher=Natural History Museum Bern |url=https://www.wsc.nmbe.ch/species/5458 |access-date=2021-01-07 }} assassin spiders. It is merely 2 mm long and catches other spiders with venomous fangs at the end of its hugely elongated jaws (chelicerae).

These animals normally run upside down.{{Cite news|url=https://www.wired.com/2014/12/absurd-creature-of-the-week-assassin-spider/|title=Absurd Creature of the Week: The World's Goofiest-Looking Spider Is Actually a Brutal Ninja|last=Simon|first=Matt|date=2014-12-19|work=Wired|access-date=2019-12-31|language=en-US|issn=1059-1028}}