Opamyrma Yamane, Bui & Eguchi, 2008

Griebenow, Zachary, 2024, Systematic revision of the ant subfamily Leptanillinae (Hymenoptera, Formicidae), ZooKeys 1189, pp. 83-184 : 83

Opamyrma Yamane, Bui & Eguchi, 2008

Opamyrma Yamane, Bui & Eguchi, 2008: 56. Type species: Opamyrma hungvuong Yamane et al., by monotypy.

Opamyrma hungvuong Yamane, Bui & Eguchi, 2008.

Diagnosis.

As for tribe.

Remarks.

Opamyrma was described in the Amblyoponinae , based solely upon worker morphology ( Yamane et al. 2008), and was subsequently found by Ward and Fisher (2016) to belong to the Leptanillinae based upon phylogenetic inference from 11 nuclear loci. All subsequent phylogenetic inference consistently recovers Opamyrma as sister to the remaining Leptanillinae ( Borowiec et al. 2019; Griebenow 2020, pers. obs.). All adult forms lack complete tergosternal fusion in abdominal segment II, a plesiomorphy unique among the Leptanillinae . The presence of weak propodeal lobes ( Yamada et al. 2020: 34) is plesiomorphic relative to the Leptanillini , in which the propodeal lobes are absent in the worker caste. The lack of petiolation of abdominal segment III in the worker caste of Opamyrma is also unique among the Leptanillinae but this character state may not be plesiomorphic for the subfamily. The polarity of the proportions of abdominal postsclerites IV relative to V-VI within the Leptanillinae is also unclear.