•
Formiciinae Lutz, 1986 •
Formiciini Lutz, 1986 •
Titanomyrma Archibald,
et al., 2011 •
Titanomyrma gigantea (Lutz, 1986) •
Titanomyrma lubei Archibald,
et al., 2011 •
Titanomyrma simillima (Lutz, 1986) •
Formicium Westwood, 1854 (collective group genus) •
Formicium berryi (Carpenter, 1929) •
Formicium brodiei Westwood, 1854 •
Formicium mirabile (Cockerell, 1920) The type
genus is
Formicium with the genus
Titanomyrma being described in 2011.
Formicium includes the described
species which are known from fossil wings only.
Formicium is known from three species.
Formicium mirabile, named by
Theodore D. A. Cockerell in 1920, and
Formicium brodiei, named by
John O. Westwood in 1854, are both known from
fore wings found in the
middle Eocene of
Bournemouth,
Dorset, England. The third species named,
Formicium berryi was named by
Frank M. Carpenter in 1929 from the middle Eocene
Claiborne Formation in
Puryear, Tennessee, USA, though he misidentified the formation as the
Wilcox Formation.
F. berryi was the first described occurrence of the genus and, until 2011, the subfamily, in North America. With the description of
Titanomyrma, the two species already described from complete body specimens,
Formicium giganteum and
F. simillimum, were transferred to the new genus as
Titanomyrma giganteum and
T. simillimum respectively.
Titanomyrma also contains a third species,
T. lubei described in the same paper as the genus and which is the second member of the subfamily known from North America. ==Size==