Epitheliomuscular cells in Lingula unguis (Brachiopoda) and Branchiostoma lanceolatum (Acrania).
D000818:Animals; D002816:Chordata, Nonvertebrate / Q000166:cytology*; D004847:Epithelial Cells; D004848:Epithelium / Q000648:ultrastructure*; D007448:Invertebrates / Q000166:cytology*; D008643:Mesentery / Q000648:ultrastructure; D008854:Microscopy, Electron; D009132:Muscles / Q000648:ultrastructure