Boltonimecia is an extinct genus of ant in the formicid subfamily Zigrasimeciinae. The genus contains a single described species, Boltonimecia canadensis, and is known from a single Late Cretaceous fossil which was found in Canada. The type species was originally described as a species of the extinct genus Sphecomyrma under the combination Sphecomyrma canadensis.
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Boltonimecia is an extinct genus of ant in the formicid subfamily Zigrasimeciinae. The genus contains a single described species, Boltonimecia canadensis, and is known from a single Late Cretaceous fossil which was found in Canada. The type species was originally described as a species of the extinct genus Sphecomyrma under the combination Sphecomyrma canadensis.
==History and classification== Boltonimecia is known from a single adult fossil, the holotype, specimen number "CAS 330" entombed in an amber chunk. At the time of the genus description, the specimen was residing in the Canadian National Collection of Insects, Arachnids and Nematodes, in Ottawa, Canada. The described specimen is of a worker caste adult which has been preserved as an inclusion in a transparent orange chunk of Canadian amber. The amber specimen was recovered in situ from the Taber coal zone near the top of Foremost Formation around Grassy Lake which is near Medicine Hat, Alberta, Canada. Canadian amber has been dated to an age of approximately 79–78 million years old, placing it in the Campanian of the Late Cretaceous.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).