Here's the Wikipedia entry:
https://en.wikipedia.org/wiki/Onychocerus_albitarsis
Onychocerus albitarsis
Onychocerus albitarsis is a relatively rare species of beetle in the family Cerambycidae from the Amazon and Atlantic forest regions in Brazil, Bolivia, Paraguay and southern Peru.[2][3][4] It is remarkable for being the only known beetle that has a venomous sting (as opposed to spraying toxins like bombardier beetles or secreting toxins from the body like blister beetles) and the only known arthropod that stings with its antennae.[2][3] Each antenna ends in a stinger that has evolved to resemble a scorpion's tail and it is connected to a venom gland.[2][3] The sting was already reported in 1884 but researchers thought the pain only was caused by the sharpness of the antennae, as also known from some other beetles. It was only confirmed in 2005 that it is venomous when a biologist was stung, comparing it to a bee sting, and subsequently studied it in detail.[3] In the first of two other cases where the identity of the stinging insect was confirmed to be this beetle, a woman experienced significant pain directly after the incident, and redness and itching at the sting site that lasted for a week. In the other case a man experienced moderate pain directly after being stung and redness that only lasted for an hour.[2] The other species in the genus
Onychocerus appear to not be venomous since they lack the structures inside the antennae that are associated with the venom apparatus of
Onychocerus albitarsis.[3]
Onychocerus albitarsis is about 2 cm (0.8 in) long and has a variable mottled pattern in yellow-brown, black and white. Little is known about its behavior, but it is phytophagous.[2]
References
1. Bezark, Larry G. A Photographic Catalog of the Cerambycidae of the World Archived 2018-08-02 at the Wayback Machine. Retrieved on 22 May 2012.
2. Amaral, A.L.S.; Castilho, A.L.; Borges De Sá, A.L.; Haddad, V. Jr. (2019). "Envenomations in humans caused by the venomous beetle Onychocerus albitarsis: Observation of two cases in São Paulo state, Brazil". Retrieved 22 July 2019.
3. Berkov, Amy; Rodríguez, Nelson; Centeno, Pedro (15 Nov 2007). "Convergent evolution in the antennae of a cerambycid beetle, Onychocerus albitarsis, and the sting of a scorpion". Naturwissenschaften. 95 (3): 257–61. doi:10.1007/s00114-007-0316-1. PMID 18004534. S2CID 30226487.
4. Tirant, S.L.; Limoges, R. (2016). "First record of Onychocerus albitarsis Pascoe, 1859 (Coleoptera: Cerambycidae: Lamiinae: Anisocerini) from Paraguay". Dugesiana. 23 (2): 120.
I am going to ask a really strange question to all the beetle experts out there. Many years ago I thought I saw/read somewhere on the internet that there was a cerambycid that could actually inject venom, for protection from predators, from the sharp tips of their long antennae? Was I just dreaming/imagining such a weird thing or does such a beetle actually exist?... is the above beetle, per chance... that mythical beast? It certainly has very sharpened antennae tips.
Quite remarkable indeed... is it the only known beetle species, to have this unique protection system or are there other spp? Where is it found & what is it's status/rarity? Any ideas, at all, on the I.D. of the beetle I thought, mistakenly, might be the one with poison injecting antennae?
