Hippopsis cf. truncatella - Hippopsis Longhorn / Serra-Pau Hippopsis (Bates, 1866)
Coleoptera: Polyphaga: Cucujiformia: Chrysomeloidea: Cerambycidae: Lamiinae: Agapanthiini
Body length: ~8,1-11mm
Date: 5th of March, 2017 at 08:39:07pm
Location: Brazil, Santa Catarina, Benedito Novo (Lat: -26.77, Long: -49.36)
Hippopsis is a genus of longhorn beetles in the order Coleoptera, suborder Polyphaga, infraorder Cucujiformia, superfamily Chrysomeloidea, family Cerambycidae, subfamily Lamiinae and tribe Agapanthiini.
At first I believed this was a H. lemniscata lemniscata but saw the genus Hippopsicon. Cesar nailed the riddle harder than me, giving a third, more probable option: Hippopsis cf. truncatella.
Hippopsicon (links in the comments) is an African genus so, unless they were introduced here, the likeliness of this being one is close to zero. H. lemniscata lemniscata also seems incorrect due to distribution status. However, the genus Hippopsis (link in the comments) seems correct. Running the Martins & Galileo (2006) key Cesar kindly provided (http://www.scielo.br/pdf/rbent/v50n4/07.pdf), H. truncatella along with other Hippopsis seem to be present in the state of Santa Catarina, all of which H. truncatella seems to better match morphologically through visual aspects (link in the comments).
The key mentions smaller dimmensions with a length of around 8,1-10,6mm, but other sources indicate a length of around 11mm. Pronotum lacks gibbosities.
Antennae measuring around 3 times the body's size. Four longitudinal light stripes could be seen on the pronotum and on the elytra. Elytral extremities are pointy. The prothorax is longer than large; pronotum without elevations; metepisternum coated by a yellowish, dense pubescence; sides of metasternum with a yellowish pubescent stripe away from the external border; urosternites with whitish pubescent bands on the sides; procoxae lack tubercles.
Their larvae are known to bury in fallen wood, so far as the translation is correct: https://id.wikipedia.org/wiki/Hippopsis_truncatella
Hippopsis are incredible little Cerambycids. They seem to be parasitize slender branches of trees. They choose the most slender twigs to cling to closely by their short, stout legs, and elongate claws to be of difficult detection; a great defensive mechanism against predation.
The first described species in Hippopsis was in the genus Saperda (Fabricius, 1775: Saperda lemniscata, Fabricius, 1801) in the United States.
Hippopsis truncatella are known to be distributed in Venezuela, Brasil (Roraima, Amazonas, Pará, Rondônia, Mato Grosso, Goiás, Mato Grosso do Sul, Maranhão, Bahia, Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo, Santa Catarina) and Bolivia (Santa Cruz) - https://www.gbif.org/species/134031304
Habitats include woodlands, gardens and places with dense vegetation and plenty of wood undergoing decay.
I do not know if they have host preferences. Additional details are welcome.
''Hippopsis truncatella'' is a species of beetle in the family Cerambycidae. It was described by Bates in 1866.