Huronia is an actinocerid

Actinocerida

The Actinocerida comprise an order of generally straight, medium to large cephalopods that lived during the early and middle Paleozoic, distinguished by a siphuncle composed of expanded segments that extend into the adjacent chambers, in which deposits formed within contain a system of radial...

 genus included in the Huroniidae along with Discoactinoceras and Huroniella,(Teichert 1964). Huronia is characterized by long siphuncle segments with the free part of the connecting rings only slightly inflated and by a narrow central canal and strongly curved radial canals located in the anterior part of each siphuncle

Siphuncle

The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk. Only cephalopods with chambered shells have siphuncles, such as the extinct ammonites and belemnites, and the living nautiluses, cuttlefish, and Spirula...

 segment

Ancestry

Teichert, (1964) indicated Huronia as being derived from the upper MiddleOrdovician

Ordovician

The Ordovician is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 488.3±1.7 to 443.7±1.5 million years ago . It follows the Cambrian Period and is followed by the Silurian Period...

 Discoactinoceras whose ancestry lay in the dirction of Polydesmia. once considered the prototypical actinocerid. Flower, (1968) on the other hand, showed that Huronia is derived from Actinoceras

Actinoceras

Actinoceras is the principal and root genus of the Actinoceratidae, a major family in the Actinocerida, that lived during the Middle and Late Ordovician.- Morphology:...

and split off from Lambeoceras

Lambeoceras

Lambeoceras is a rather large actinocerid with a convexly lenticular cross section from the Upper Ordovician of North America, and the sole representative of the family Lambeoceratidae.-Morphological Description:...

during Red River time, near the start of the Late Ordovician, precluding the inclusion of Discoactinoceras

Distribution

Huronia is known from the Upper Ordovician and Silurian

Silurian

The Silurian is a geologic period and system that extends from the end of the Ordovician Period, about 443.7 ± 1.5 Mya , to the beginning of the Devonian Period, about 416.0 ± 2.8 Mya . As with other geologic periods, the rock beds that define the period's start and end are well identified, but the...

of North America and Greenland. H. arctica and H occidentalis(?) are associated with the Cape Calhoun fauna in Greenland.(Flower 1957) H paulodolata and H munuens come from the Middle Silurian of Michigan (Teichert 1964) H sepata is found in the Shamattawa limestone of Hudson Bay (Flower 1957)