The ambers of the peninsula occur in the upper levels of the Kheta Formation, which is exposed in a number of locations in the Taimyr region.

[1][2] Both the holotype and the second specimen for B. casei are adult males which have been preserved as inclusions in transparent chunks of New Jersey amber.

The amber specimens were recovered from deposits of the South Amboy Fire Clay, part of the Raritan Formation.

Analysis of the amber composition indicates it originated as cupressaceous resins which were deposited in lagoons and salt water marshes along the Cretaceous eastern seaboard.

Paleoecology based on Charentese amber inclusions indicate a shore line mangrove type forest that was of a subtropical to warm temperate climate, with occasional dry periods.

[5] The amber specimens are recovered from deposits exposed in quarries, road constructions, and beach exposures in the Charente-Maritime region of coastal France, notably at Archingeay.

[5][7] An additional amber specimen with partial fossils of six males of an unidentified species was described in 2013, and named as Baikuris ocellantis in 2024.

At the base of the outer mandible surface is a ridge and oval area that may be the opening for the mandibular gland.

On both the mid and hind leg sets, the end of the femurs have developed into additional trochantellus segments.

[4] The fore wings are an estimated 4.7 mm (0.19 in) long and show distinct darkening in the middle area.

Unlike any of the other Baikuris species, the North Carolina fossils have short labial and long maxillary palps.