Taxa Count: 64
ORTHOTETIDAE
Derbyia
Derbyia arellanoi
Derbyia auriplexa
Derbyia bella
Derbyia buchi
Derbyia carteri
Derbyia cincinnata
Derbyia complicata
Derbyia correana
Derbyia crassa
Derbyia crenulata
Derbyia cymbula
Derbyia deltauriculata
Derbyia elongata
Derbyia filosa
Derbyia hooserensis
Derbyia informis
Derbyia kaskaskiensis
Derbyia laqueata
Derbyia nasuta
Derbyia pannucia
Derbyia plicatella
Derbyia profunda
Derbyia regularis
Derbyia robusta
Derbyia scitula
Derbyia scobina
Derbyia sp 1
Derbyia sp 2
Derbyia sp 3
Derbyia sp a
Derbyia sp b
Derbyia strophomenoidea
Derbyia texta
Derbyia wabaunseensis
Derbyina jamesiana
Derbyina smithii
Derbyoides dunbari
Derbyoides marathonensis
Derbyoides sp 1
Derbyoides sp 2
Hipparionyx
Hipparionyx proximus
Hipparionyx unguiformis
Orthotetes
Orthotetes (Derbyia)
Orthotetes (Orthotetes)
Orthotetes batesvillensis
Orthotetes chemungensis
Orthotetes declivis
Orthotetes distortus
Orthotetes distortus var. campanulatus
Orthotetes guadalupensis
Orthotetes kaskaskiensis
Orthotetes kaskaskiensis bransonorum
Orthotetes keokuk
Orthotetes mutabilis
Orthotetes protensus
Orthotetes sp a
Orthotetes stenopsis
Orthotetes subglobosus
Orthotetes subglobosus var. batesvillensis
Orthotetes subglobosus var. protensus
Werriea keokuk