Rhyncogonus fosbergi Van Dyke

Fosberg’s Rhyncogonus Weevil (Rhyncogonus fosbergi)

Fosberg’s Rhyncogonus Weevil is one of only two (so far known) species from this genus, which are known to be endemic to Kiribati.

It is an blackish coloured species, whose males reach a size of about 0,75 cm, while females are about 0,9 cm long.

The animals live on several native plant species, on which they also feed, among them te ren (Heliotropium foertherianum Diane & Hilger), te mao (Scaevola taccada (Gaertn.) Roxb.), and te kaura (Sida fallax Walp.).

Fosberg’s Rhyncogonus Weevil, together with Fanning Rhyncogonus Weevil (Rhyncogonus vagus Van Dyke), belongs to a group of three species, which is restricted to an (imaginary) arc connecting the Line Islands with the Wake atoll – where the only species of the genus outside Polynesia occurs. [1][2]

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References:

[1] Edwin C. Van Dyke: Rhyncogonus of the Mangarevan Expedition. Bishop Museum Occasional Papers 13(11): 89-129. 1937
[2] G. A. Samuelson: Review of Rhyncogonus of the Hawaiian Islands (Coleoptera: Curculionidae). Bishop Museum in Entomology 11: 1-107. 2003

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