Amphipod

(Bactrurus pseudomucronatus)

Arkansas Wedge

(Xolotrema occidentale)

Bat Cave Isopod

(Caecidotea macropropoda)

Calico Rock Oval

(Patera clenchi)

Cave Obligate Harvestman

(Crosbyella distincta)

Cave Obligate Harvestman

(Crosbyella roeweri)

Cave Obligate Isopod

(Caecidotea simulator)

Cave Obligate Millipede

(Trigenotyla parca)

Cave Obligate Planarian

(Dendrocoelopsis americana)

Cave Obligate Pseudoscorpion

(Apochthonius diabolus)

Cave Obligate Pseudoscorpion

(Apochthonius titanicus)

Cave Obligate Springtail

(Schaefferia alabamensis)

Channelled Pebblesnail

(Somatogyrus wheeleri)

Earthworm

(Diplocardia meansi)

Elevated Spring Amphipod

(Stygobromus elatus)

Foushee Cavesnail

(Amnicola cora)

Hubricht's Long-tailed Amphipod

(Allocrangonyx hubrichti)

Isopod

(Lirceus bicuspidatus)

Isopod

(Caecidotea ancyla)

Isopod

(Caecidotea dimorpha)

Isopod

(Caecidotea steevesi)

Isopod

(Caecidotea stiladactyla)

Isopod

(Caecidotea oculata)

Isopod

(Caecidotea fonticulus)

Isopod

(Caecidotea salamensis)

Isopod

(Lirceus bidentatus)

Land Snail

(Gastrocopta rogersensis)

Magazine Mountain Shagreen

(Inflectarius magazinensis)

Millipede

(Abacion wilhelminae)

Mountain Cave Amphipod

(Stygobromus montanus)

Ouachita Needlefly

(Zealeuctra wachita)

Ouachita Pebblesnail

(Somatogyrus amnicoloides)

Ouachita Slitmouth

(Stenotrema unciferum)

Ozark Cave Amphipod

(Stygobromus ozarkensis)

Ozark Pyrg

(Pyrgulopsis ozarkensis)

Pseudoscorpion

(Microcreagris ozarkensis)

Pseudoscorpion

(Pseudozaona occidentalis)

Rich Mountain Slitmouth

(Stenotrema pilsbryi)

Shelled Cave Springtail

(Pseudosinella testa)

Springtail

(Pseudosinella dubia)

Springtail

(Arrhopalites clarus)

Striate Supercoil

(Paravitrea aulacogyra)

Thicklipped Pebblesnail

(Somatogyrus crassilabris)

White Liptooth

(Millerelix peregrina)