Collared Saint Helena Weevil (Acanthomerus monilicornis)
The Collared Saint Helena Weevil was described in 1869; it is, or maybe was, endemic to the island of Saint Helena, where it appears to have been quite common and widespread once.:
“This is the common Acanthomerus at Plantation, – where it swarms in the dead branches and trunks of the various species of oak, as well as in the crevices of old posts &c.; and I am inclined to think that it be should looked upon as having been attached originally to the gumwoods, which must once have been dominant throughout that district; and I have taken it amongst the gumwoods at Thompson’s Wood, where, however, it is less abundant than the A. ellipticus. At any rate it is more particularly a species of intermediate altitudes; though I believe that on one occasion I met with a single example of it towards the central ridge.” [1]
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The species was not found during the most recent field searches and is believed to be possibly extinct.
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References:
[1] T. Vernon Wollaston: Coleoptera Sanctae-Helenae. London: John Van Voorst, Paternoster Row 1877
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edited: 27.05.2021