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🧬 Biological Classification (Kingdom to Species)Macrostemum radiatum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydropsychidae

Genus

Macrostemum

Species

Macrostemum radiatum

Insecta❔ Diet unknown

Macrostemum radiatum

Macrostemum radiatum (Macrostemum radiatum · Macrostemum radiatum)

🛡️ Conservation Status (IUCN Red List)NE (Not Evaluated)

Not Evaluated (NE) on the IUCN Red List yet.

Geological Era

Extant

Diet

No data

Length · Height

2cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Riverbeds of mixed sand and large gravel in riffles with slightly slower flow (larvae)

💡 Everyday Comparisons for Size, Mass & Speed

💡 An adult length of 20 mm is slightly smaller than the diameter of a Korean 100-won coin (24 mm) (Comparison).
💡 Uji City in Kyoto, Japan reported that adults of this caddisfly fly into tourist spots, shopping streets, and homes, affecting daily life. In experiments, far fewer individuals were attracted to LED lights than to fluorescent lamps.
💡 Rivers inhabited by these larvae, which filter food with underwater net retreats, generally have clean water, making them a clue for gauging water quality.

Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.

#큰줄날도래#Macrostemum radiatum

📖 1. Overview

Macrostemum radiatum is a caddisfly in the family Hydropsychidae that spins nets in flowing water to filter food, and is included in checklists of the Korean Peninsula. In Japan, it sometimes emerges in mass numbers from rivers and flies into residential areas.

🦴 2. Anatomy & Morphology

Adults have a total length of about 20 mm, glossy pale yellow forewings with black stripes, and long antennae about 1.5 times the body length. Larvae are about 20 mm long and about 5 mm wide.

🔍 3. Ecology & Behavior

In riffles with slightly slower currents, larvae build fine-meshed net retreats equipped with chimney-like intake and outlet tubes to filter food such as phytoplankton. Members of Hydropsychidae are generally regarded as organisms living in clean or relatively clean water.

🇰🇷 4. Connection to Korea

It is included in the checklist of Korean caddisflies (2020) and is listed as 'Keun-jul-nal-do-rae' (Korean name) on the National List of Species of Korea by the National Institute of Biological Resources (NIBR).