Romblonella

Romblonella is probably the sister taxon to Stereomyrmex. Closely related genera are Leptothorax and Cardiocondyla.^[2]

Very little is known about these uncommon ants. Most species were found to nest in twigs on trees and to forage on low vegetation.^[3]

Workers of R. opaca are about 4 mm long. They have a small sting. R. opaca was described from four specimens found on Romblon Island, Philippines, by Wheeler (1935).^[4] However, the species had already been described by F. Smith in 1861 as Myrmica opaca, which had been collected at Tondano, Sulawesi by Alfred Russel Wallace.^[5]

R. elysii workers are 2 mm long. They were originally described as Crematogaster from a few workers from the Solomon Islands.^[6] R. heatwolei workers are almost 4 mm long.^[2]

Only for R. palauensis and R. heatwolei have males been described.^[2]

Romblonella is found from the Philippines south through New Guinea, with one species known from Australia. The distribution stretches to the islands of the western South Pacific.^{[citation needed]}

The genus is named after the locality where the type species was found.^{[citation needed]}

• Romblonella elysii (Mann, 1919) — Malapina, Big Nggela: Solomon Islands
• Romblonella heatwolei Taylor, 1991 — Wyer Island: Torres Strait: Queensland: Australia
• Romblonella opaca (F. Smith, 1861) — Philippines, Indonesia
• Romblonella palauensis M. R. Smith, 1953 — Auluptagel, Urukthapal, Babelthaub: Palau: Caroline Islands
• Romblonella scrobifera (Emery, 1897)^[7] — Aitape, Manus Province, East Sepik Province, Morobe Province, East New Britain Province: New Guinea
• Romblonella townesi M. R. Smith, 1953 — Mount Lasso: Tinian Island: Northern Mariana Islands
• Romblonella vitiensis M. R. Smith, 1953 — Wakaya Island: Fiji Islands
• Romblonella yapensis M. R. Smith, 1953 — Yap Island: Caroline Islands

• 
  Specimen of a Romblonella opaca
• 
  Specimen of a Romblonella palauensis
• 
  Specimen of a Romblonella scrobifera