Cerapachyinae, Forel, 1893

Dlussky, G. M., Rasnitsyn, A. P. & Perfilieva, K. S., 2015, The Ants (Hymenoptera: Formicidae) of Bol’shaya Svetlovodnaya (Late Eocene of Sikhote-Alin, Russian Far East), Caucasian Entomological Bulletin 11 (1), pp. 131-152 : 140

Cerapachyinae incertae generis ( Fig. 20)

Material. PIN 3429/1132, gyne or worker.Biamo.

Description. Gyne or worker. Body length 7.3 mm. Body elongated. Waist consisting of 1 segment (petiole); gaster with distinctive constriction between 1st and 2nd gastral (abdominal III and IV) segments. Head as long as wide. Eye ovate, moderate size. Antennal insertions approximate.Petiole sessile,nearly rectangular in dorsal view, with weakly convex sides, 1.2times as long as wide, with longitudinal rugae. 1st gastral segment 0.56 times as long as2nd. Pygidium without spines or teeth.

Measurements, mm: AL2; HL1.1; HW1.1; ED0.41; PtL0.88; PtW0.74.

Notes. Peculiar petiolar form combined with the approximate antennal bases are characteristic of some Cerapachyinae and unknown in other ants. At the same time, incomplete preservation state of the unique fossil permits neither its attribution to a genus nor description a new one. There are 7 cerapachyine species in the fossil record, 3 described from the Late Eocene ambers (Procerapachys annosus Wheeler, 1915, P.favosus Wheeler, 1915 , P.sulcatus Dlussky, 2009 [ Dlussky, 2009]) and4 from the Early Miocene Dominican amber ( Acanthostichus hispaniolicus de Andrade, 1998, Cylindromyrmex antillanus de Andrade, 1998, C. electrinus de Andrade, 1998 and C.inopinatus de Andrade, 2001 [ Wheeler, 1915; de Andrade, 1998, 2001; Dlussky, 2009]).