Willow Sawflies and allies

Pronunciation

How to pronounce Nematini: /nɛˈmætɪˌnaɪ/

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Summary

Nematini is a tribe of sawflies within the family Tenthredinidae, known for its diversity with over 350 species across North America. They are important herbivores and can potentially impact local ecosystems and human interests.

Physical Characteristics

Nematini sawflies exhibit a variety of sizes and colors, generally characterized by robust bodies and well-developed antennae. Their larvae are often caterpillar-like, with distinctive feeding habits, typically consuming foliage.

Identification Tips

Look for their distinctive saw-like ovipositors in females and the typical body shape of sawflies, which lacks the narrow waist found in many wasps.

Habitat

Nematini species are usually found in forested areas, gardens, and places with abundant shrubbery where their host plants are present.

Distribution

Nematini are distributed throughout North America, with over 350 species recorded in the area.

Diet

Larvae primarily feed on the leaves of various plants, particularly deciduous trees and shrubs.

Life Cycle

Nematini undergo a complete metamorphosis: egg, larva, pupa, and adult stages. The larvae are typically leaf feeders and can often be found in clusters.

Reproduction

Reproduction is sexual, with females using their ovipositors to lay eggs on or in host plant tissues, which later hatch into larvae.

Predators

Predators of Nematini larvae include birds, predatory insects like lacewing larvae, and parasitic wasps.

Ecosystem Role

As herbivores, Nematini play a role in the food web by serving as prey for various predators and influencing plant community dynamics through their feeding activities.

Economic Impact

Some species may be considered pests due to their ability to defoliate valued plants and trees, potentially impacting agricultural and horticultural interests.

Collecting Methods

• Net sweeping
• Hand collection from host plants
• Sticky traps

Preservation Methods

• Ethanol preservation
• Pinning specimens
• Drying and storing in airtight containers

Evolution

Nematini are one of the largest and diverse groups within the sawflies, demonstrating significant ecological adaptability and host plant range.

Similar Taxa

• Other tribes within Tenthredinidae
• Bees
• Wasps

Misconceptions

Nematini are often confused with wasps due to their similar appearance, but they are not true wasps and lack a narrow waist.

Tags

• Nematini
• sawflies
• Tenthredinidae
• North America
• herbivores