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The Oklahoma Department of Wildlife Conservation is the state agency responsible for managing fish and wildlife.

Crustacea

Allocragonyx pellucidus - Oklahoma Cave Amphipod
Bactrurus hubrichti - Kansas Well Amphipod
Stygobromus bowmani - Bowman's Cave Amphipod
Stygobromus ozarkensis - Ozark Cave Amphipod

Caecidotea acuticarpa
Caecidotea ancyla
Caecidotea antricola
Caecidotea macropoda
Caecidotea simulator
Caecidotea stiladactyla

Cambarus subterraneus - Cave Crayfish
Cambarus tartarus - Oklahoma Cave Crayfish
Faxonella blairi
Orconectes menae
Orconectes nana
Orconectes saxatilis - Kiamichi Crayfish
Procambarus tenuis

Odonata

Gomphus oklahomensis - Oklahoma Clubtail
Gomphus ozarkensis - Ozark Clubtail
Somatochlora ozarkensis - Ozark Emerald

Orthoptera

Eximacris phenax - Big Cedar Grasshopper; now considered a synonym of Trimerotropis maritima - Seaside Grasshopper, a common e US species
Gryllotalpa major - Prairie Mole Cricket

Coleoptera

Dubiraphia parva - Little Dubiraphian Riffle Beetle
Nicrophorus americanus - American Burying Beetle (ABB)

Lepidoptera

Speyeria diana - Diana Fritillary
Speyeria idalia - Regal Fritillary

Amblyscirtes linda - Linda's Roadside Skipper
Atrytone arogos iowa - Iowa Skipper
Cogia outis - Outis Skipper
Hesperia attalus - Dotted Skipper
Problema byssus - Byssus Skipper

Hemileuca slosseri - Shinnery Oak Buck Moth
Papaipema eryngii - Rattlesnake Master Borer

Oklahoma's 2015 draft SGCN list is here:
Oklahoma Comprehensive Wildlife Conservation Strategy: A Strategic Conservation Plan for Oklahoma's Rare and Declining Wildlife - PDF