Anabarites is a problematic lower Cambrian genus, and is one of the small shelly fossils. It was abundant in the early Tommotian and is also found in the Nemakit-Daldynian.
The fossils represent the triradially symmetrical mineralised tube in which the organism dwelt; it was sedentary. It is named after the Anabar region in Yakutia, Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

; its name does not imply 'heavy'.

Further reading

For images, see

Artem Kouchinsky, Stefan Bengtson (2002). "The tube wall of Cambrian anabaritids". Acta Palaeontol. Pol. 47 (3): 431–444.