Tanysphyrus lemnae
This record describes Tanysphyrus lemnae (species). Recorded family: Erirhinidae. Recorded order: Coleoptera.
Identification and Appearance
1.2-1.9mm. This tiny weevil is closely associated with duckweeds ( Lemna sp. ). Generally dark with patches of pale scales on the thorax, abdomen and femora. The rostrum is a similar length to the pronotum. Key features are the tarsal segments: the third has wide lobes and the end segment barely protrudes giving a truncate appearance. Tanysphyrus atra is broadly similar but has only been found at one site in Eastern England. This species lacks a subapical tooth on the inner margin of the pro-tibia. Unless identified by a recognised expert, photographic evidence is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used. Note the beetle's size and describe the identifying characters. It is advisable to retain the specimen in case further checks are needed. All year, but the adults are most active from March to November. Common and widespread across England and Wales, particularly in the south. No additional images available for this species.
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Coleoptera (Beetles)
- Suborder
- Polyphaga
- Superfamily
- Curculionoidea
- Family
- Erirhinidae
- Subfamily
- Erirhininae
- Genus
- Tanysphyrus
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Habitat
Wetland where duckweed is found.
Seasonal Activity
All year, but the adults are most active from March to November.
Additional species information
Recorded status
Common and widespread across England and Wales, particularly in the south.
About Primitive Winged Insects: the wider group
Order-level background for Coleoptera, the group containing Tanysphyrus lemnae. Species-specific details appear above.
Group overview
Coleoptera is the largest order of insects with over 400,000 described species, representing ~25% of all known animal species and ~40% of all insects. In the U.S. alone, nearly 30,000 beetle species have been identified.
Ecological role of the group
Beetles are prominent decomposers, especially in forests, breaking down dead wood and recycling nutrients. As predators, they reduce populations of pest insects. Many species are also important pollinators of flowering plants.
Economic and practical significance of the group
Beetles have major economic significance: leaf beetles (Chrysomelidae) and weevils (Curculionoidea) are among the most destructive agricultural pests globally, costing billions annually, while predatory species like ladybugs provide natural pest control.
Recorded sources for this group: Britannica, Smithsonian, NCSU Entomology. Imported estimates may describe particular regions or reporting periods.
Photos of Tanysphyrus lemnae (2)
Frequently Asked Questions About Tanysphyrus lemnae
What is Tanysphyrus lemnae?
Tanysphyrus lemnae is a species in the family Erirhinidae, within the order Coleoptera.
How big is Tanysphyrus lemnae?
to the pronotum. Key features are the tarsal segments: the third has wide lobes and the end segment barely protrudes giving a truncate appearance.
Where is Tanysphyrus lemnae found?
Habitat: Wetland where duckweed is found.
When is Tanysphyrus lemnae active?
Tanysphyrus lemnae: seasonal activity - All year, but the adults are most active from March to November..