Dwija Ganapathi (Dvija Ganapati) is the 6th form among 32 forms of Lord Ganesha. He is depicted with foud heads (Chaturmukha) & 4 arms (Chaturbhuja) similar to Lord Brahma.
Dwija Ganapati is neither mentioned in 21 types of Ganesha (Ekavimsathi Ganapathi) nor in 16 types of Ganesha (Shodasha Ganapati). He shines in the colour of Moon and wears lightning-like bangles on his arms.
Dwija Ganapathi Dhyanam: Dvija Ganesha Mantram
Yah pustakaksha gunadanda kamandalu Shrih
Nirvarthya maana karabhushana mindu varnam
Sthamberamanana chaturbhuja shobhamanam
Thwaam samsmarethi dwija ganadhipathim sa dhanyah
Appearance & Iconography of Dwija Ganapathi
Dvija Ganapathi shines in moon-like white complexion. In his hands, he holds a book, rosary beads, kamandalu (vessel used during worship), and a danda (staff).
Worship
Dwija Ganapathi is worshipped on Ganesha Jayanti, Vinayaka Chaturthi & Durva Ganapati vrat. Those who worship Dwija Ganesha will be blessed with health & prosperity.
Dwija Ganapathi Dhyana Mantra