Cross sections through the median area of five species of Thyasiroidea showing the demibranchs on one side in cross section. A Thyasira sarsi, B Thyasira flexuosa, C Axinus cascadiensis, D Conchocele bisecta, E Ochetoctena tomasi. lbp lateral body pouch; sbc supra branchial chamber.

 
 
  Part of: Oliver G (2014) “TUBULAR GILLS” Extreme gill modification in the Thyasiroidea with the description of Ochetoctena tomasi gen. et sp. nov. (Bivalvia: Thyasiroidea). Zoosystematics and Evolution 90(2): 121-132. https://doi.org/10.3897/zse.90.8323