ammonites
Porkunites dubius Khayznikova 1989 (demosponge)

Demospongea - Chaetetida - Cryptolichenariidae

Full reference: K. B. Khayznikova. 1989. Biostratigrafiya i tabulyaty biogermnykh otlozheniy rannego paleozoya; Yuzhnoye Verkhoyanye [Biostratigraphy and Tabulata of lower Paleozoic bioherm deposits; southern Verkhoyansk region]

Belongs to Porkunites according to K. B. Khayznikova 1989

Sister taxa: none

Type specimen: Its type locality is Otvorot River, Sette Daban Mountains, unit 4, which is in an Ashgillian reef, buildup or bioherm limestone in the Baraniy Formation of the Russian Federation

Ecology: stationary epifaunal suspension feeder