Vibrational-sounding
Guides
Messatoporus
Messatoporus is a large New World genus of ichneumonid wasps in the subfamily Cryptinae, comprising 89 valid species. The genus is monophyletic and distinguished by a unique combination of morphological synapomorphies including specialized mandible structure and propodeal features. Species exhibit a morphological gradient from forms resembling other Osprynchotina to a highly derived morphotype with convergent traits similar to Gabuniina, interpreted as adaptations for locating and accessing deeply concealed hosts.
Orus armiger
Orus armiger is a species of parasitic woodwasp in the family Orussidae, a group notable for their unique evolutionary position and specialized host-finding behavior. The family Orussidae contains only about 75 species worldwide, making it one of the smallest and least understood families of Hymenoptera. Orussid wasps are the only parasitoid wasps that attack wood-boring beetle larvae, using vibrational sounding to locate hosts within solid wood. Adults are rarely encountered in the field and are frequently mistaken for ants due to their appearance and behavior.
Orussidae
parasitic wood wasps, parasitoid wood wasps
Orussidae is a small family of approximately 93 extant species of parasitoid sawflies. They occupy a pivotal phylogenetic position as the sister taxon to the megadiverse Apocrita, indicating that parasitism evolved in the common ancestor of Orussidae + Apocrita. Adults are rarely encountered, typically found on sun-exposed dead wood where females use vibrational sounding to locate concealed hosts. Larvae are the only carnivorous sawfly larvae known, acting as parasitoids of wood-boring beetles and other Hymenoptera.
Orussus
Orussus is a genus of parasitic wood wasps in the family Orussidae, comprising approximately 11 described species. These wasps are unique among woodwasps for their parasitoid lifestyle, attacking the immature stages of wood-boring beetles and other wasps. Adults are rarely encountered and have historically been poorly collected, though citizen science platforms have recently helped expand knowledge of their distribution. The genus has undergone significant taxonomic revision, now placed in its own superfamily Orussoidea within the suborder Apocrita.
Orussus occidentalis
Western Orussid Wasp
Orussus occidentalis is a parasitic woodwasp in the family Orussidae, one of the most evolutionarily basal lineages of parasitic Hymenoptera. Adults are rarely encountered and frequently mistaken for carpenter ants due to their dark coloration and wing-folding posture. The species employs a unique host-location strategy using vibrational sounding: females tap their clubbed antennae against wood surfaces and detect returning echoes through specialized subgenual organs in their front legs to locate concealed wood-boring beetle larvae.
Orussus thoracicus
Orussus thoracicus is a parasitic woodwasp in the family Orussidae, one of the rarest and most unusual groups of Hymenoptera. Adults are often mistaken for carpenter ants due to their dark coloration and wing-folding behavior. The species has been recorded from Canada, specifically British Columbia, though its biology and ecology remain poorly documented. Like other orussids, it likely parasitizes wood-boring beetle larvae using specialized vibrational sounding to locate hosts.