ammonites
Basslerella firma Kellett 1935 (ostracod)

Ostracoda - Podocopida - Cytherideidae

Full reference: B. Kellett. 1935. Ostracodes of the Upper Pennsylvanian and the Lower Permian strata of Kanss: III. Bairdiidae (concluded), Cytherellidae, Cypridinidae, Entomoconchidae, Cytheridae, and Cypridae. Journal of Paleontology 9(2):132-166

Belongs to Basslerella according to T. Z. Yan et al. 2005

Sister taxa: Basslerella acuta, Basslerella annesophieae, Basslerella crassa, Basslerella favosa, Basslerella jadarensis, Basslerella obesa, Basslerella ola, Basslerella ovata, Basslerella reticulata, Basslerella rothi, Basslerella shaxianensis, Basslerella subola, Basslerella tota

Type specimen: USNM 90125. Its type locality is Upstream of Cottonwood River Bridge, Elmdale, which is in a Gzhelian shallow subtidal shale in the Elmdale Formation of Kansas.

Ecology: epifaunal detritivore-grazer

Average measurements (in mm): carapace 0.459 x 0.245, valve 0.475 x 0.250