"Calosoma retusum" reaches about in length. "Calosoma sycophanta" can reach a length of about . Calosoma retusum is a beetle of the family Carabidae. Calosoma sycophanta was among the insect fossils of the site. The ground beetle, "Calosoma frigidum" also feeds on the caterpillars. Calosoma oregonus is a species of ground beetle in the subfamily of Carabinae. Calosoma politum is a species of ground beetle in the subfamily of Carabinae. Calosoma persianum is a species of ground beetle in the subfamily of Carabinae. Calosoma himalayanum is a species of ground beetle in the subfamily of Carabinae. Calosoma gestroi is a species of ground beetle in the subfamily of Carabinae. Calosoma externum is a species of ground beetle in the subfamily of Carabinae. Calosoma chlorostictum is a species of ground beetle in the subfamily of Carabinae. Calosoma antinorii is a species of ground beetle in the subfamily of Carabinae. Calosoma subaeneus is a species of ground beetle in the subfamily of Carabinae. Calosoma fischeri is a species of ground beetle in the subfamily of Carabinae.