Adults are about 25–35 mm long.
Fine-art photographic collection
Pachyteria dimidiata
A metallic longhorn with a yellow mid-body warning band and larvae capable of tunnelling through living ornamental trees.
About this species
Pachyteria dimidiataWestwood, 1848
Information reviewed15 July 2026
Pachyteria dimidiata is a large Asian longhorn recognised by a blue-black body, a broad yellow band across the elytra and yellow terminal antennal segments. It has expanded into new documented localities including Singapore.
Taxonomy
Animalia · Arthropoda · Insecta · Coleoptera · Cerambycidae · Pachyteria
Accepted taxon. · checked 2026-07-15
South and Southeast Asia, with records from India to Malaysia, China and SingaporeBroad range and selected reference localities — not a complete occurrence map.
South and Southeast Asia, with records from India to Malaysia, China and Singapore
Tropical forest, gardens and planted landscapes containing host trees.
Adults fly by day and visit trunks and foliage.
Larvae bore in woody stems; adults feed on plant fluids.
Solitary.
What makes this species remarkable?
The yellow band does not merely decorate the wing cases: together with the yellow antennal tips it divides an otherwise metallic blue-black body into bold blocks visible at long distance.
In Singapore the species was recorded from star apple, Chrysophyllum cainito, providing a precise modern host association and showing that planted urban trees can become stepping-stones for a forest longhorn.
Its larvae can tunnel inside living or recently cut ornamental and fruit trees, converting solid wood into a protected feeding corridor before the adult cuts an exit and emerges fully armoured.