ammonites
Rhipidomella subcircularis Shen and He 1994 (lamp shell)

Rhynchonellata - Orthida - Rhipidomellidae

Full reference: S. Z. Shen and X. L. He. 1994. Changhsingian brachiopod faunas from Guiding, Guizhou. Acta Palaeontologica Sinica 33:440-454

Belongs to Rhipidomella according to S. Z. Shen and G. R. Shi 2007

Sister taxa: Rhipidomella carbonaria, Rhipidomella caucasica, Rhipidomella cora, Rhipidomella corallina, Rhipidomella cordialis, Rhipidomella dzhuvankarensis, Rhipidomella fortimuscula, Rhipidomella hessensis, Rhipidomella hispidula, Rhipidomella kharaulakhensis, Rhipidomella miaolingensis, Rhipidomella michelini, Rhipidomella miscella, Rhipidomella obesiconcha, Rhipidomella orthogonia, Rhipidomella parva, Rhipidomella pecosi, Rhipidomella penniana, Rhipidomella pressula, Rhipidomella uralica, Rhipidomella vediensis

Type specimen: GD-8161. Its type locality is Wenjiangsi Section, Changxing Fm, Guiding County, which is in a Changhsingian carbonate limestone in the Changxing Formation of China.

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 14.2 x 14.9