ammonites
Basslerella crassa 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 D. Q. Chen and H. Bao 1986

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

Type specimen: USNM 90123. 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.

Ecology: epifaunal detritivore-grazer

Average measurements (in mm): carapace 0.607 x 0.326, valve length 0.700