A new genus of Achrysonini and new records in Cerambycidae (Coleoptera, Chrysomeloidea) from Colombia

Abstract. Ysachron pilosus gen. et sp. nov. is described from the Caribbean region of Colombia, and an updated key to genera of South American Achrysonini is provided. Moreover, the geographical distribution of 45 species of Cerambycidae, belonging to the subfamilies Cerambycinae, Lamiinae and Prioninae, is expanded, including nine new country records for Colombia and a further locality in Colombia for nine species.

Although we are aware of the great similarity between the tribes Achrysonini, Hesperophanini and Oemini, Ysachron gen. nov. differs from Hesperophanini and Oemini by having procoxal cavities not strongly angulate laterally , while they are strongly angulate in the latter two .
The new genus also differs from genera of Hesperophanini by the median lobe with the apical region shorter than basal apophysis

Differential diagnosis
As for genus.
LEGS. Profemora fusiform, meso-and metafemora subclavate; lateral sides of femora rugose, remaining surface smooth; setae denser toward apex. Metatarsomere I about as long as II-III together.

Geographical distribution
Costa Rica, Panama, Colombia. The species is registered from Colombia but without any further locality. Herein, the species is registered from the departments of Atlántico and Bolívar (Colombia).

Geographical distribution
Trinidad & Tobago, Venezuela, Colombia. The species is registered from Colombia but without further locality. Herein, the species is registered from the departments of Atlántico and Bolívar (Colombia).

Geographical distribution
Brazil. A new country record from Colombia (Bolívar) is added.

Geographical distribution
Costa Rica, Colombia, Venezuela, Brazil (São Paulo), Argentina (Misiones). The species is registered from Colombia but without further locality. Herein, the species is registered from the department of Atlántico (Colombia).

Discussion
Colombia is considered one of the 12 countries with the greatest biological biodiversity in the world, it has a prodigious natural richness and, although it only represents 0.7% of the world's land surface, concentrates in its territory about 10% of the planet's biodiversity (Mittermeier & Goettsch 1997;Colciencias 2016).
Currently, in Colombia there are about 920 known species of Cerambycidae (Botero 2018). Considering the richness of the country in terms of biodiversity and when comparing to the Cerambycidae fauna of other better-studied countries in the region, there is no doubt that the number of Cerambycidae species and the knowledge of their distribution in Colombia should continue to increase in upcoming years.
With the description of the new genus herein, Achrysonini now comprises ten genera and 32 species in South America.