Monastic Orders within Theravada

Theravada monks typically belong to a particular nikaya, variously referred to as monastic orders or fraternities. These different orders do not typically develop separate doctrines, but may differ in the manner in which they observe monastic rules. These monastic orders represent lineages of ordination, typically tracing their origin to a particular group of monks that established a new ordination tradition within a particular country or geographic area. In Sri Lanka caste plays a major role in the division into nikayas. Some Theravada Buddhist countries appoint or elect a sangharaja, or Supreme Patriarch of the Sangha, as the highest ranking or seniormost monk in a particular area, or from a particular nikaya. The demise of monarchies has resulted in the suspension of these posts in some countries, but patriarchs have continued to be appointed in Thailand. Burma and Cambodia ended the practice of appointing a sangharaja for some time, but the position was later restored, though in Cambodia it lapsed again.
*Bangladesh:
**Sangharaj Nikaya
**Mahasthabir Nikaya
*Burma (Myanmar):
**Thudhamma Nikaya
**Shwekyin Nikaya
**Dvara Nikaya
*Sri Lanka:
**Siam Nikaya
***Malwaththa 
***Asgiriya
***Waturawila (or Mahavihara Vamshika Shyamopali Vanavasa Nikaya)
**Amarapura NikayaMany Sub orders including
***Dharmarakshitha 
***Kanduboda (or Swejin Nikaya)
***Tapovana (or Kalyanavamsa)
**Ramañña Nikaya
***Galduwa (or Kalyana Yogashramaya Samsthava)
***Delduwa
*Thailand and Cambodia
**Maha Nikaya
**Dhammayuttika Nikaya
Category:Buddhism