Iron herklotsi
General appearance
Body color yellowish
brown with some dark markings; size large up to 18mm long (excluding antennae & cerci)
Cerci longer than body length by 1.5 times; medium filament greatly reduced to give 2-tailed impression
Head
Head flattened, sub-triangular shape with anterior end wider; antennae short and slender
The details for mouthparts
illustrated in the following pictures
Thorax
The details for legs
illustrated in the following pictures
Abdomen
Gills I - VII: gill I enlarged to form sucking disc; fibrilliform well-developed on gills I - VI, but absent on gill VII
Abdomen terga with distinct markings e.g. terga III - IV & VII - IX with longitudinal lines medially (shown clearly in late larval stage)
Posterior margin of terga I - IX with a pair of tubercules submedially
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Legs |
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Its mouthparts of labrum, mandibles, maxillae and labium are illustrated as follow (hypopharynx is excluded).
Labrum |
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Maxillae |
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Mandibles |
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Labium |
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Distribution:
In Hong Kong, specimens are recorded from Shing Mun, Tai Po Kau Forest Stream, Ng Tung Chai, Lam Tsuen River and Pui O (Lantau Island).
Habitat: Larvae are found in fast flowing current in streams.