Hexagonites is an extinct genus from the nautiloid order, Naulilida which includes the genus Nautilus

Nautilus

Nautilus is the common name of marine creatures of cephalopod family Nautilidae, the sole extant family of the superfamily Nautilaceae and of its smaller but near equal suborder, Nautilina. It comprises six living species in two genera, the type of which is the genus Nautilus...

found living in the tropical western Pacific

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

. Hexagonites is included in the Family Tainoceratidae which makes up part of the superfamily Tainocerataceae (Kummel 1964, K414)

Hexagonites is based on an incomplete, crushed specimen from the Permian of China. Its shell is very evolute, with an hexagonal whorl section, and 6 rows of tuberucles, in pairs on the ventrolateral, lateral, and dorsolateral angles. The suture has shallow lobes. (ibid)

See also: Nautiloid

Nautiloid

Nautiloids are a large and diverse group of marine cephalopods belonging to the subclass Nautiloidea that began in the Late Cambrian and are represented today by the living Nautilus. Nautiloids flourished during the early Paleozoic era, where they constituted the main predatory animals, and...