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The Curculionidae are a family of weevils, commonly called snout beetles or true weevils. They are one of the largest animal families with 6,800 genera and 83,000 species described worldwide. They are the sister group to the family Brentidae.
Ambrosia beetles are beetles of the weevil subfamilies Scolytinae and Platypodinae, which live in nutritional symbiosis with ambrosia fungi. The beetles excavate tunnels in dead or stressed trees in which they cultivate fungal gardens, their sole source of nutrition. After landing on a suitable tree, an ambrosia beetle excavates a tunnel in which it releases its fungal symbiont. The fungus penetrates the plant's xylem tissue, extracts nutrients from it, and concentrates the nutrients on and near the surface of the beetle gallery. Ambrosia fungi are typically poor wood degraders, and instead utilize less demanding nutrients. Symbiotic fungi produce and detoxify ethanol, which is an attractant for ambrosia beetles and likely prevents growth of antagonistic pathogens and selects for other beneficial symbionts. The majority of ambrosia beetles colonize xylem of recently dead trees, but some attack stressed trees that are still alive, and a few species attack healthy trees. Species differ in their preference for different parts of trees, different stages of deterioration, and in the shape of their tunnels ("galleries"). However, the majority of ambrosia beetles are not specialized to any taxonomic group of hosts, unlike most phytophagous organisms including the closely related bark beetles. One species of ambrosia beetle, Austroplatypus incompertus exhibits eusociality, one of the few organisms outside of Hymenoptera and Isoptera to do so.
A bark beetle is the common name for the subfamily of beetles Scolytinae. Previously, this was considered a distinct family (Scolytidae), but is now understood to be a specialized clade of the "true weevil" family (Curculionidae). Although the term "bark beetle" refers to the fact that many species feed in the inner bark (phloem) layer of trees, the subfamily also has many species with other lifestyles, including some that bore into wood, feed in fruit and seeds, or tunnel into herbaceous plants. Well-known species are members of the type genus Scolytus, namely the European elm bark beetle S. multistriatus and the large elm bark beetle S. scolytus, which like the American elm bark beetle Hylurgopinus rufipes, transmit Dutch elm disease fungi (Ophiostoma). The mountain pine beetle Dendroctonus ponderosae, southern pine beetle Dendroctonus frontalis, and their near relatives are major pests of conifer forests in North America. A similarly aggressive species in Europe is the spruce ips Ips typographus. A tiny bark beetle, the coffee berry borer, Hypothenemus hampei is a major pest on coffee plantations around the world.
Xyleborus glabratus, the redbay ambrosia beetle, is a type of ambrosia beetle invasive in the United States. It has been documented as the primary vector of Raffaelea lauricola, the fungus that causes laurel wilt, a disease that can kill several North American tree species in the family Lauraceae, including redbay, sassafras, and avocado.
Euwallacea fornicatus is a species complex consisting of multiple cryptic species of ambrosia beetles, known as an invasive species in California, Israel and South Africa. The species has also been unintentionally introduced into exotic greenhouses in several European countries. As the rest of the ambrosia beetles, E. fornicatus larvae and adults feed on a symbiotic fungus carried in a specific structure called mycangium. In E. fornicatus, the mycangium is located in the mandible. The combination of massive numbers of beetles with the symbiotic fungus kills trees, even though the fungus alone is a weak pathogen.
Xylosandrus germanus, known generally as the alnus ambrosia beetle or black stem borer, is a species of ambrosia beetle in the family Curculionidae. The black stem borer is native to eastern Asia, but is an invasive species in Europe and North America. This species carries and feeds on associated ambrosia fungus, Ambrosiella grosmanniae.
Cnestus mutilatus, commonly known as the camphor shot borer, camphor shoot borer, or sweetgum ambrosia beetle, is a species of ambrosia beetle in the subfamily Scolytinae of the weevil family Curculionidae. It is native to Asia, but has been established as an invasive species in the United States since 1999.
Xyleborus dispar is a species of bark beetle commonly called the Pear blight beetle, or the European shothole borer. It is an invasive species in North America, and can be a pest in orchards and forests throughout its range.
Euwallacea interjectus, is a species of weevil native to Asia but introduced to Westerns parts of the world.
Euwallacea piceus, is a species of weevil native to Oriental Asia but introduced to African and other Westerns Pacific parts of the world. It is a serious pest in tropical and subtropical parts of the Americas.
Xylosandrus arquatus, is a species of weevil endemic to Sri Lanka.
Xylosandrus discolor, is a species of weevil found in Australia, Micronesia, Myanmar, China, India, Sri Lanka, Indonesia, Malaysia, Taiwan and Thailand.
Xylosandrus morigerus, is a species of weevil widespread throughout Afrotropical, Australian, Neotropical, Oceania and Oriental regions. It is also introduced to Palearctic regional countries.
Xylosandrus pygmaeus, is a species of weevil found in Indonesia, Malaysia and Sri Lanka.
Cnestus gravidus is a species of weevil found in Bangladesh, Sri Lanka, India, Myanmar, Laos, Thailand, Vietnam and China.
Euwallacea perbrevis, commonly known as tea shot-hole borer, is a species of weevil native to South and South-East Asia through to Australia, but introduced to Western countries.
Arixyleborus malayensis, is a species of weevil found in India, Sri Lanka, China, Japan, Malaysia, Vietnam and Indonesia. This is the only species of Arixyleborus found in Japan and China.
Arixyleborus rugosipes, is a species of weevil native to India, Sri Lanka, Philippines, Malaysia, Borneo, Vietnam, Indonesia, and in Australia, Japan, Korea, New Zealand as an exotic species.
Diuncus haberkorni, is a species of weevil found in India, Sri Lanka, Bangladesh, Taiwan, Java, Japan, Malaysia, New Guinea, South Korea, Taiwan, Thailand, and Vietnam. It is also imported to African countried such as South Africa, and Tanzania.
Euwallacea similis, is a species of weevil native in the Oriental region through to Australia but shows a cosmopolitan distribution due to introduction to many parts of the world.
References
- ↑ Wood, Stephen L. (1992). "Nomenclatural Changes and New Species in Platypodidae and Scolytidae (Coleoptera), Part II". The Great Basin Naturalist. 52 (1): 78–88. JSTOR 41712699 . Retrieved 2021-09-03.
- ↑ "A Synopsis of the Scolytine Ambrosia Beetles of Thailand (Coleoptera: Curculionidae: Scolytinae)". Zootaxa 3875 (1): 1-82. Retrieved 2021-09-02.
- ↑ "A New Species and Five Newly Recorded Species of Scolytinae (Coloptera: Curculionidae) from Korea". Entomological Research Bulletin 33(2): 131-137 (2017). Retrieved 2021-09-02.
- ↑ Beaver, R. A. (1984-01-13). "The biology of the ambrosia beetle, Sueus niisimai (Eggers) (Col., Scolytidae), in Fiji". Entomologist' s Monthly Magazine. Retrieved 2021-09-03.
- ↑ "Sueus niisimai (Eggers, 1926)". www.gbif.org. Retrieved 2021-09-03.
- ↑ Li, You; Skelton, James; Adams, Sawyer; Hattori, Yukako; Smith, Matthew E.; Hulcr, Jiri (2020-06-16). "The Ambrosia Beetle Sueus niisimai (Scolytinae: Hyorrhynchini) is Associated with the Canker Disease Fungus Diatrypella japonica (Xylariales)". Plant Disease. 104 (12): 3143–3150. doi:10.1094/PDIS-03-20-0482-RE. PMID 33136520 . Retrieved 2021-09-03.
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