Formosimyrma

The holotype worker of this monotypic genus was collected in an evergreen forest in Taiwan.

Identification
Terayama (2009) - Formosimyrma is a member of the Solenopsidini tribe in the Subfamily Myrmicinae. Within the genera of tribe Solenopsidini, this genus most resembles the genus Mayriella, distributed from Nepal through Southeast Asia into Papua New Guinea and Australia to New Zealand. However, it is distinguished from the latter by the median portion of clypeus with a thin and high longitudinal wall (anterior margin of clypeus armed with a pair of sharp teeth just above the mandibles in Mayriella), 8-segmented antennae (10-segmented in Mayriella), and oval eyes (eyes elongate and lower section narrows into a point in Mayriella)

Nomenclature

 *  FORMOSIMYRMA [Myrmicinae: Solenopsidini]
 * Formosimyrma Terayama, 2009: 158. Type-species: Formosimyrma lanyuensis, by original designation.

Worker
Diagnosis of worker. Monomorphic terrestrial myrmicine ants with the following combination of characters.

1. Mandible broad triangle, with 7 teeth.

2. Median portion of clypeus with a thin and high longitudinal wall; the wall well produced anteriorly in full face view.

3. Frontal lobes narrow, connected each other, and produced and covered to the level of anterior margin of clypeus.

4. Frontal carinae and antennal scrobes developed.

5. Eye small and oval, positioned in front of the midlength of the sides of the head.

6. Antenna 8-segmented; scape short, apical 2 segments froming a distinct club.

7. Alitrunk short and stout; promesonotal dorsum convex in profile.

8. Metanotal groove present.

9. Propodeum with a pair of acute teeth.

10. Petiole with long peduncle and reversed U-shape node.

11. Postpetiole higher than long.

12. Middle and hind tibiae without tibial spur.

Etymology
Formosi, old name of Taiwan, 'Formosa' + myrma, Gr., ant.