Agarwood vs Common Spangle Gall

Aquilaria filaria compared with Neuroterus quercusbaccarum

Key Differences

• Agarwood is Vulnerable while Common Spangle Gall is Not Evaluated.

Taxonomic Classification

Rank	Agarwood	Common Spangle Gall
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Arthropoda (Arthropods)
Class	Magnoliopsida (Dicots)	Insecta (Insects)
Order	Malvales (Malvales)	Hymenoptera (Ants, Bees & Wasps)
Family	Thymelaeaceae	Cynipidae
Genus	Aquilaria	Neuroterus
Species	Aquilaria filaria	Neuroterus quercusbaccarum

Conservation Status

Agarwood

VU — Vulnerable

Common Spangle Gall

NE — Not Evaluated

Physical Characteristics

Attribute	Agarwood	Common Spangle Gall
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Agarwood

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Common Spangle Gall

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Agarwood

The Agarwood (Aquilaria filaria) is a species in the genus Aquilaria. It is currently classified as Vulnerable on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Common Spangle Gall

<em>Neuroterus quercusbaccarum</em>, commonly known as the common spangle gall, is a small gall wasp in the family Cynipidae, closely associated with oaks in Europe and western Asia. This species is notable for its complex life cycle involving alternating sexual and asexual generations, each producing morphologically distinct galls on its oak hosts. The asexual generation typically induces flat, disc-shaped "spangle" galls on the undersides of oak leaves, while the sexual generation produces small "currant" galls on oak catkins and leaves in spring. <em>Neuroterus quercusbaccarum</em> is widely distributed across Europe, extending into parts of western Asia and North Africa wherever suitable oak hosts, particularly <em>Quercus robur</em> and <em>Quercus petraea</em>, occur. The species has not been evaluated under IUCN Red List criteria, and population trends are not formally monitored, though it remains common across much of its range. Biological traits such as average lifespan in years, body dimensions, and weight remain poorly documented in the scientific literature for this minute insect. The larvae develop entirely within gall tissue, feeding on plant nutrients provided by the gall structure they induce. Adult wasps are free-living and do not feed substantially. Conservation status is listed as Not Evaluated.