Calcitronidae

{{Short description|Extinct family of whip scorpions}}

{{Taxobox

| fossil_range = {{fossil_range|Pliocene}}

| regnum = Animalia

| phylum = Arthropoda

| classis = Arachnida

| ordo = Schizomida ?

| familia = Calcitronidae

| familia_authority = Petrunkevitch, 1945 {{cite web|title=BioLib - Calcitronidae|url=https://www.biolib.cz/en/taxon/id400875/|publisher=BioLib|accessdate=23 May 2012}}

}}

The family Calcitronidae is an extinct group of arachnids. Its two monotypic genera are only known from Pliocene deposits of calcite in Arizona.{{cite journal |last=Rowland |first=J. Mark |title=Revision of the Schizomida (Arachnida) |journal=Journal of the New York Entomological Society |year=1972 |volume=80 |issue=4 |pages=195–204 |jstor=25008826}} The family has been placed in the order Schizomida, but a review of the order concluded that "the fossil taxa ... are so poorly known that final placement must await further study and possibly new material",{{Cite book |last1=Reddell |first1=J.R. |last2=Cokendolpher |first2=J. C. |date=1995 |title=Catalogue, bibliography, and generic revision of the order Schizomida (Arachnida) |publisher=Texas Memorial Museum |series=Speleological Monographs 4 |url=http://www.nsrl.ttu.edu/personnel/JCCokendolpher/Cokendolpherpubs/publications/1995Reddell_Cokendolpher_catalogue.pdf |accessdate=2016-03-30 |name-list-style=amp|archive-url=https://web.archive.org/web/20160411232313/http://www.nsrl.ttu.edu/personnel/JCCokendolpher/Cokendolpherpubs/publications/1995Reddell_Cokendolpher_catalogue.pdf |archive-date=2016-04-11 |url-status=dead }} and they are not listed in the order in a 2016 catalog of fossil arachnids.{{cite web |last1=Dunlop |first1=J.A. |last2=Penney |first2=D. |last3=Jekel |first3=D. |date=2016 |title=A summary list of fossil spiders and their relatives, version 16.5 |work=World Spider Catalog |publisher=Natural History Museum Bern |url=http://www.wsc.nmbe.ch/resources/fossils/Fossils16.5.pdf |accessdate=2016-03-30 |name-list-style=amp}}