†family Calcitronidae Petrunkevitch 1945 (short-tailed whip-scorpion)

Arachnida - Thelyphonida - Calcitronidae

Full reference: A. Petrunkevitch. 1945. Calcitro fisheri, a new fossil arachnid. American Journal of Science 243:320-329

Parent taxon: Hubbardioidea according to L. Prendini 2025

See also Clouse et al. 2017, Dunlop et al. 2013 and Petrunkevitch 1945

Sister taxa: Hubbardiidae, Protoschizomidae

Subtaxa: Calcitro

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Type: Calcitro

Ecology:

Distribution:

• Pliocene of United States (1: Arizona collection)

• Eocene of China (1)

Total: 2 collections each including a single occurrence

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