THERE is significant forensic evidence in a case against a group of bikies allegedly involved in a wild brawl in an Adelaide nightclub, a court has heard.

Police have arrested 19 members or associates of the Hells Angels and Finks bikie gangs, charging them with aggravated riot in relation to the incident in May.

Among those charged over the incident was Finks member Nicholas John Forbes, 41, who was arrested on the Gold Coast last month and extradited to Adelaide.

Police alleged he was part of the gang's ''terror team'', a group of bikies who were overtly violent.

Some of the bikies appeared in the Adelaide Magistrates Court today when prosecutors said the case was complex and involved the processing of a large amount of forensic material, including fingerprint evidence.

Police previously alleged the rival gangs attacked each other with bar stools and bottles during the brawl, which forced other patrons of the nightclub to flee for their safety.

It was captured by security cameras, with police using the footage to make arrests.

Magistrate Alf Grasso today adjourned the case to October 4, when the prosecution will be required to provide declarations.

The defendants will be asked to answer the charges on a later date.