With reference to the genus Aspergillus, phialide form directly on the vesicle; a biseriate phialide is supported by a metula.
                                                            
                                                     
                        
                                                
                        
                        
                            in Aspergillus, a vesicle bearing a single layer of phialides
                                                            
                                                     
                        
                                                
                        
                        
                            Having phialides that arise directly from the vesicle in species of Aspergillus.