Gnathosyne, Ponomarenko, 1969

Yan, Evgeny V., Beutel, Rolf G. & Ponomarenko, Alexander G., 2017, Ademosynidae (Insecta: Coleoptera): A new concept for a coleopteran key taxon and its phylogenetic affinities to the extant suborders, Palaeontologia Electronica 5 (8), pp. 1-22 : 9

Gnathosyne : Ponomarenko, 1969, p. 129

Type species. Gnathosyne akkolkensis Ponomarenko, 1969 by original designation.

Differential diagnosis. Anterior prosternal margin almost straight, very slightly concave; metacoxae three times as wide as long, not narrowing laterally. Revised diagnosis. Head transverse, distinctly wider than long (not counting mandibular length). Mandibles closely spaced. Antennal insertions dorsal. Eyes large, ovoid, inserted laterally. Pronotum transverse, only slightly narrowing anteriorly; posterior angles very small and acute. Head strongly retracted below pronotum. Anterior prosternal margin distinctly posterior to anterior margin of pronotum, distance about one third of pronotal length. Prosternal intercoxal process not projecting beyond procoxae. Propleurites only slightly narrower anteriorly. Mesoventrite transverse, almost quadrangular, with very short anterior process and small rhomboid cavity. Metaventrite with very long anterior intercoxal process; longitudinal suture distinct only on basal half; paracoxal suture distinct.

Species included. Monotypic.