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Paratype worker of S. freyi. Before the discovery of the first Sphecomyrma fossils, there were no fossil records of any ants from Cretaceous amber and the oldest social insects at the time extended back to the Eocene epoch; the earliest known ant at the time was described from a forewing found in the Claiborne Formation [A] in Tennessee.
Dating of the amber has been done through pollen analysis and it is generally accepted to be approximately 100 million years old. [3] [4] The majority of described fossils have been found and described from Burmese amber. The Asian specimens were recovered from unspecified deposits in the Hukawng Valley of Kachin State, Myanmar. [5]
The eyes of the North Carolina fossils are oval in outline though, which is only seen in B. casei and not the Taimyr amber species. Unlike any of the other Baikuris species, the North Carolina fossils have short labial and long maxillary palps.
The discovery comes from a fossil of an ancient firefly species that was initially discovered in 2016, trapped in 99 million-year-old Burmese amber from northern Myanmar. The beetle is only the ...
Fossils found in amber, particularly from the Baltic and Myanmar (Burma), have been assigned to a number of extant and extinct genera placed in the family Archaeidae. [5] The extinct species Burmesarchaea grimaldii (syn. Afrarchaea grimaldii) was found in Burmese amber dated to 88–95 Mya. [6]
Cephalotes alveolatus is an extinct species of ant in the subfamily Myrmicinae known from a single Middle Miocene fossil found in amber on Hispaniola. At the time of description C. alveolatus was one of seven fossil ant species placed in the Cephalotes coffeae clade.
Zophotermes is known from only two fossils, the holotype adult and an additional set of wings, both of which are inclusions in transparent chunks of amber. The amber specimens, numbers "Tad-42" and "Tad-97" respectively, are both housed in the fossil collection of the Birbal Sahni Institute of Palaeobotany in Lucknow, India. The holotype is ...
The peculiar morphology of stalk-eyed flies makes it easy to identify their fossils (e.g. in amber); one fossil genus is Prosphyracephala, known from Eocene aged Baltic amber. [6] This genus has stalked eyes and is the earliest diverging member of the Diopsinae. [3]