Coryneforms
As coryneform refers to bacterial cells with a particular lobe-like thickened at one end of cell morphology (Greek coryne = lobe). Along with cocci , rods, filamentous, stalked and other cell shapes, coryneform cells form one of the categories into which bacteria are classified based on their cell shape that can be seen under the microscope. Basically, the cell shape of bacteria says little about their relationship. It can only point to the correct classification of an unknown bacterium as one of many characteristics.
Coryneform cell types, however, occur more frequently in certain genera, for example in corynebacteria , bifidobacteria , arthrobacter and propionibacteria .
Bacteria that go through certain development cycles or pleomorphic bacteria can appear coryneform even temporarily.