Both sites represent upland lake systems that were surrounded by a warm temperate ecosystem with nearby volcanism.

[2] The highlands likely had a mesic upper microthermal to lower mesothermal climate, in which winter temperatures rarely dropped low enough for snow, and which were seasonably equitable.

Princeton's multiple linear regression CLAMP results gave a slightly lower 5.1 °C (41.2 °F), and the LMA returned a mean annual temperature of 5.1 ± 2.2 °C (41.2 ± 4.0 °F).

[1] Wilson (1982) noted the diet to be supported by close association of shed Amia scales and coprolites at multiple Okanagan highlands locations in British Columbia and Washington.

[1] Wilson (1996) proposed a near-shore weedy habitat at Republic, noting that such conditions are typically sought out by Amiid species.

hesperia in the Princeton area were the mooneye species Hiodon rosei, the sucker Amyzon brevipinne, the sandroller Libotonius blakeburnensis and the ancestral salmon Eosalmo driftwoodensis.

[1] In a brief 1996 article Wilson noted the amiid scales found in the Klondike Mountain Formation around Republic, Washington, were likely from Amia?

[6] The phylogeny, fossil record, and species belonging to Amiidae were reviewed and redescribed by Grande & Bemis (1998) who placed Amia?

However, they noted that due to the preservation aspects of the holotype and the incomplete nature of the hind sections of the fish, placement within Amia was not certain when the extinct genus Cyclurus was recognized as a distinct taxon.

On the mouth roof in both genera, the parasphenoid hosts a tooth patch, which for Amia is long and narrow in outline, while for Cyclurus is short and trends towards heart shaped.

hesperia the disarticulated nature of the head obscures the majority of the parasphenoid tooth patch, with only a small portion of the posterior area visible.

Additionally the total number of preural centra is unknown, and as such, the species was left as genus incertae sedis within the subfamily, awaiting recovery and description of more fossil material.

hesperia was noted to be the most western and northern occurrence for subfamily Amiinae, though undescribed or poorly defined fossils have been identified from as far north as Ellesmere Island and Spitzbergen.

The frontal bone is a similar in length to width ratio to that of A. pattersoni, but is notably smaller than in either A. calva or A. scutata.