A rare body fossil Bactryllum Heer 1853 from the Ejecta of Shyamnagar mud volcano, North Andaman and its status

Bactryllium Heer 1853 has been treated by different authors as a fossil community under diatom, pteropods and faunal excreta. The present investigation recorded Bactryllium cf. B. canaliculatum Heer 8153 as a group of tubular fossil mass trapped on a lump of sandstone ejected through the mud volcano at Shyamnagar, North Andaman, revealing a different history of faunal affinity altogether. Bactrylluim Heer 1853 sensu stricto conforms to body fossil and its age range can be extended up to Cretaceous from the Triassic