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Bairdia geisi
Taxonomy
Bairdia geisi was named by Kellett (1934). Its type specimen is USNM 89476, a carapace, and it is a 3D body fossil. Its type locality is Cottonwood River Bridge, shale on top of buff limestone, Elmdale, which is in a Gzhelian shallow subtidal shale in the Elmdale Formation of Kansas.
Sister species lacking formal opinion data
B. africana, B. altifrons, B. anomala, B. antamputata, B. auricula, B. austriaca, B. billjohnsoni, B. birinae, B. bradfieldi, B. cassiana, B. ciscoensis, B. colonensis, B. condylus, B. confragosaeformis, B. crebra, B. croneisi, B. croskeina, B. cultrijugati, B. dissortis, B. dolicha, B. egorovi, B. eleziana, B. eleziana, B. exoura, B. fabaeformis, B. fusca, B. gibbosa, B. gosportensis, B. haworthi, B. hilda, B. hisingeriformis, B. hispida, B. hiwannensis, B. hondurasensis, B. isoscelata, B. kaschewarovae, B. kawakensis, B. kelleri, B. kinderhookensis, B. knuepferi, B. legumen, B. longisetosa, B. manifesta, B. meishanensis, B. moorei, B. mucronata, B. multihilosa, B. nitida, B. oklahomensis, B. opisthorhadina, B. paraproba, B. peneovoidea, B. philippovae, B. pinnula, B. proxischimensis, B. psiegorkiensis, B. rectifrontis, B. singularis, B. soldadensis, B. subcitriformis, B. subeleziana, B. subvexa, B. summa, B. turgida, B. urodeliformis, B. virga, B. feliumgibba, B. pompillioides, B. gliberti