Hylurgus

Latreille, 1806

red-haired bark beetles

Species Guides

Hylurgus ligniperda(Goldenhaired Bark Beetle)

Hylurgus is a of bark beetles in the Curculionidae, Scolytinae. The genus includes economically significant forestry pests, most notably Hylurgus ligniperda (red-haired bark ), which is native to Eurasia and has established on multiple continents. in this genus are associated with coniferous , particularly Pinus species, and maintain complex symbiotic relationships with fungi and bacteria that facilitate host and environmental .

Hylurgus ligniperda by (c) Landcare Research New Zealand Ltd., some rights reserved (CC BY). Used under a CC-BY license.

Hylurgus indicus by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Hylurgus: //hɪˈlɜːrɡəs//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Images

Habitat

Coniferous forests; specifically associated with pine trees (Pinus spp.) including stumps, bark, and phloem tissue. Gallery systems constructed in cambial region of trees.

Distribution

Native to Eurasia; established on every continent where pines occur including North America, South America, Oceania (Australia, New Zealand), Asia (China, Japan), and Africa (South Africa, Morocco, Tunisia).

Diet

Phloem tissue of Pinus . Hylurgus ligniperda specifically feeds on phloem of Pinus thunbergii and other pine species.

Host Associations

Pinus spp. - primary phloem and cambial feeding
Pinus thunbergii - specifically documented for H. ligniperda
Pinus radiata - documented in New Zealand

Life Cycle

→ larva (four instars) → pupa → . time minimum 72 days under laboratory conditions. Hylurgus ligniperda: females lay average of 30.9 eggs; time and adult body mass affected by gut bacterial associates.

Behavior

Bores into bark and constructs galleries in phloem tissue. used during mating; males produce stridulatory sounds, females do not. Males modify call parameters based on physical interactions rather than acoustic stimulation from other males. Gut undergoes dynamic in response to temperature changes.

Ecological Role

Major biotic driver of tree mortality in coniferous forests. Reduces vitality of native pine forests, impairs windbreak and sand-fixation capacity in coastal shelterbelts. for ophiostomatoid fungi including Ceratocystiopsis, Graphilbum, Hawksworthiomyces, Leptographium, Masuyamyces, and Ophiostoma . Associated with including Bursaphelenchus tusciae.

Human Relevance

Significant forestry pest of concern. Infested logs require with methyl bromide for export. Subject of integrated management research and development of microbe-targeted control strategies. Acoustic monitoring methods developed for early detection.

Similar Taxa

DendroctonusBoth are scolytine bark beetles associated with conifers; Hylurgus distinguished by red setae on and pronotum in H. ligniperda, and different gallery patterns
IpsBoth colonize pine bark; Hylurgus lacks the characteristic declivity spines of Ips and has different fungal associations

More Details

Microbial symbioses

Maintains complex bacterial including Rahnella perminowiae, Serratia marcescens, and Hafnia psychrotolerans that facilitate temperature and nutrient conversion. Associated with diverse ophiostomatoid fungal communities that vary by geographic region and differ between gallery-derived versus trap-collected individuals.

Acoustic characteristics

Hylurgus ligniperda produces acoustic signals distinguishable from Buprestidae: higher pulse count (27.00 ± 22.31), peak amplitude (-37.34 ± 3.40 dB), and peak frequency (3208.25 ± 783.62 Hz) during feeding. Feeding and crawling produce distinct acoustic signatures.