Xiphydria

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Xiphydria
Xiphydria camelus female (dorsal view) - Keila.jpg
Xiphydria camelus, female
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Xiphydriidae
Genus: Xiphydria
Latreille, 1802
Synonyms
  • HybonotusKlug, 1803
  • XiphiuraFallén, 1813
  • XiphidriaLamarck, 1817
  • HyponotusBillberg, 1820
  • XyphidriaLepeletier, 1823
  • KonowiaBrauns, 1884
  • PseudoxiphydriaEnslin, 1911

Xiphydria is a genus of wood wasps belonging to the family Xiphydriidae. [1]

Contents

This genus is Holarctic, being found in Europe, Asia and North America. [1]

Description

In Xiphydria, the head has mandibles each with four teeth, 5-segmented maxillary palps, a clypeus with a medial tooth-like projection and antennae with about 20 segments. The pronotum is strongly constricted in dorsal view and the propleuron is long in lateral view (this means the head is positioned on a relatively long "neck"). The hind wing has only two closed cells. [2]

Larvae are white and grub-like. They resemble larvae of Siricidae, another wood-boring group of sawflies. [2]

Biology

Female Xiphydria oviposit into diseased or dead wood, often branches that have fallen or are about to fall (widowmakers). During oviposition, they also infect the wood with a symbiotic fungus that starts decomposing the wood. Eggs hatch into larvae that bore galleries into wood parallel to the grain. As larvae feed, they pack frass (waste) behind their bodies. At maturity, larvae become prepupae which switch direction so the gallery runs towards the outside of the branch (this is to reduce the amount of wood that needs to be chewed through later). The next step is pupation. Once that is complete, adult wasps emerge, leaving behind emergence holes ~3 mm wide in the wood. This genus is univoltine, meaning there is one generation per year. [2]

They attack a range of different broadleaf trees: Acer (maple), Betula (birch), Ulmus (elm), Carya (hickory), Populus (cottonwood), Salix (willow), Alnus (alder), Platanus (sycamore, plane), Rhus (sumac), Fagus (beech), Fraxinus (ash), Tilia (basswood), Ostrya (hophornbeam), Crataegus (hawthorn), Carpinus (hornbeam), Prunus (cherry, plum), and Quercus (oak). [2]

Importance to humans

Xiphydriidae may occur in firewood or raw woodworking materials. While usually of little economic importance, X. longicallis can cause economic damage to oak wood. [2]

Species

The following species are recognised in the genus Xiphydria: [1]

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References

  1. 1 2 3 "Xiphydria Latreille, 1802". www.gbif.org. Retrieved 27 February 2021.
  2. 1 2 3 4 5 "Xiphydria". Sawfly GenUS. April 2022. Retrieved March 6, 2024.