Gauromyrmex, Menozzi, 1933: 146, Menozzi, 1933

Chen, Defu & Chen, Zhilin, 2022, Ants of the genus Gauromyrmex Menozzi (Hymenoptera: Formicidae), with description of a new species from China, Asian Myrmecology (e 015007) 15, pp. 1-10 : 2-6

Gauromyrme x Menozzi, 1933

Gauromyrmex Menozzi, 1933: 146 . Type-species: Gauromyrmex bengkalisi , by monotypy. Synonymized with Vollenhovia by Hölldobler & Wilson, 1990: 16; revived from synonymy by Bolton, 2003: 246, 269.

Solenomyrma Karavaiev, 1935: 103 . Type-species: Solenomyrma acanthina , by monotypy. Synonymized by Brown, 1953: 10.

Acalama Smith, M.R. 1949: 206 . Type-species: Acalama donisthorpei (junior synonym of Solenomyrma acanthina ), by original designation. Synonymized by Brown, 1953: 10.

Diagnosis. The worker of this genus is similar to Vollenhovia , but with 11-segmented antennae, and petiole in lateral view without a distinct anterior peduncle, but with triangular node forming acute a dorsal angl or denticle

Distribution. China, Borneo, India, Indonesia, Thailand, Vietnam.

Synoptic list of world species of Gauromyrmex G. acanthinus ( Karavaiev, 1935)

= G. donisthorpei Smith, 1949

G. bengkalisi Menozzi, 1933

G. orbihumerus Chen & Chen sp. nov.

Key to known species of Gauromyrmex based on worker caste

1. In dorsal view, humeral corners of pronotum with a pair of distinct denticles ( Figs. 2, 5, 8 )...... .............................................................................. ....................... G. acanthinus ( Karavaiev, 1935)

- In dorsal view, humeral corners of pronotum rounded ( Figs. 12 , 16 )........................................ 2

2. In full face view, anteromedian part of clypeus prominent, with anterior margin arc depression, forming rounded lobes laterally; posterior corners of propodeum rounded; subpetiolar process absent; in full face view, head smooth and shiny; in dorsal view, pronotum with longitudinal striation and puncta; mesonotum, propodeum, petiole and postpetiole reticulate-puncture ( Figs. 11–13 ) ...... ............................... G. bengkalisi Menozzi, 1933

- In full face view, anteromedian part of clypeus unremarkable, with anterior margin weakly depression, but no forming rounded lobes laterally; posterior corners of propodeum with marked spines or teeth; subpetiolar process triangular transparently; in full face view, head longitudinally striate; in full face view, promesonotal dorsum weakly and longitudinally striate ( Figs. 14–16 )...................... ...................................... G. orbihumerus sp. nov.

Figures

Figs. 1 – 9. Gauromyrmex acanthinus worker. 1, 4, 7. Head in full-face view; 2, 5, 8. Body in dorsal view; 3, 6, 9. Body in profile view.

Figs. 10 – 13. Gauromyrmex bengkalisi Cotype worker. 10. Head in full-face view; 11. Label; 12. Body in dorsal view; 13. Body in profile view. (Cotype, https://www.antweb.org, CASENT0172783, images by April Nobile)

Figs. 14 – 16. Gauromyrmex orbihumerus sp. nov. Holotype worker. 14. Head in full-face view; 15. Body in dorsal view; 16. Body in profile view.A. Head in full-face view; B. Mandible in full-face view; C. Body in dorsal view; D. Body in profile view.