Vermileo

Macquart, 1834

wormlion

Species Guides

2

Vermileo is a of wormlions, a group of rare predatory flies in the Vermileonidae. are nectar-feeding that visit flowers. Larvae are unique among Diptera in constructing funnel-shaped pitfall traps in sandy or fine-grained soil to capture prey, a convergent with antlions (Myrmeleontidae). The genus includes approximately 11 described distributed across multiple continents.

Pronunciation

How to pronounce Vermileo: /vɛr.miˈle.o/

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

Identification

Vermileo can be distinguished from other vermileonid by morphological features including wing venation patterns and body size. Larvae are identified by spine characteristics and body proportions. Adults typically have elongated mouthparts adapted for nectar feeding. Specific identification to species level requires examination of genitalia and detailed morphological analysis.

Habitat

Larvae inhabit fine-grained soil or sand in rain-protected microhabitats, including areas under rocks, pavilions, and wood debris. Specific documented sites include river sands accumulated under rocks adjacent to rivers and northern banks of waterways at elevations ranging from 1650–2500 m.

Distribution

occur across multiple continents including Europe, Africa, Asia, and North America. Documented locations include southern Xizang (Tibet) Autonomous Region in China (Dinggyê and Yadong counties), with potential extension to nearby Bhutan.

Diet

feed on nectar from flowers. Larvae are that capture prey using pitfall traps; specific prey types have not been documented at the level.

Life Cycle

Complete with , larva, pupa, and stages. Larval stage comprises most of the . Final instar larvae measure 20–28 mm. Pupae are 15–16 mm and covered with fine sand grains, with larval attached posteriorly. Adults can be obtained through rearing larvae in fine-grained substrate from collection sites.

Behavior

Larvae construct and maintain funnel-shaped pitfall traps in loose substrate for ambush . When prey enters the pit, larvae flail to fling loose material and subdue the victim with venom before consumption. rest on vegetation and visit flowers for nectar.

Ecological Role

function as of flowering plants. Larvae act as in soil and sand microhabitats.

Human Relevance

Wormlions contribute to diversity and function, though they are less recognized than bees or butterflies. The has been subject to thermal physiology research investigating acclimation responses.

Similar Taxa

  • Myrmeleontidae (antlions)Larvae share convergent pit-building predatory , but antlions are neuropterans with distinct including clubbed and different wing venation
  • Other Vermileonidae genera Vermileo can be distinguished by specific wing venation patterns, body proportions, and genitalia structure; larvae differ in spine number and arrangement

Sources and further reading