Prehistoric avifaunas from the Kingdom of Tonga Author Worthy, Trevor H. Author Burley, David V. text Zoological Journal of the Linnean Society 2020 189 998 1045 journal article 0024-4082 6970CF4-C1F0-4637-BC8C-B24C0BD2366D GENUS DIDUNCULUS PEALE , 1849 Remarks: The genus Didunculus is represented by one extant species, the tooth-billed pigeon, Didunculus strigirostris ( Jardine, 1845 ) , a large colourful pigeon, notable for its stout, hooked bill, that historically was restricted to the islands of Savai'i, Upolu and Nu'utele in Western Samoa ( Steadman, 2006a , b). Steadman (2006b) described an extinct species, Di. placopedetes , from Late Holocene fossil deposits on ' Eua and Tongatapu in Tonga . This was also a common species in the Teouma fauna on Efate, Vanuatu ( Worthy et al. , 2015 ). Diagnostic features distinguishing this species from the similar-sized Columba vitiensis Quoy & Gaimard, 1830 and Du. pacifica and from the larger C. nicobarica were presented by Worthy et al. (2015) . The present Tongan material did not differ from the Vanuatu material. DIDUNCULUS PLACOPEDETES STEADMAN , 2006 , TONGAN TOOTH-BILLED PIGEON