Species:
Epeorus khayengensis Braasch & Boonsoong, 2010ClassificationPhylum: Arthropoda Class: Insecta Order: Ephemeroptera Family: Heptageniidae Genus: Epeorus
Collection specimenHolotype: - Mature male larva: Zoological Museum, Kasetsart University, Bangkok, Thailand
Paratype: - 7 larvae: Zoological Museum, Kasetsart University, Bangkok, Thailand, 1 male Larva and 1 female Larva: collection Dietrich Braasch, Potsdam, Germany
Morphology:Larva: The larva of
E. khayengensis can be distinguished from that of other congeners by abdominal terga 2–9 without long acute median spine on posterior
margin, but bearing long hair-like setae (Boonsoong and Braasch, 2013).
Figure
Larva of Epeorus khayengensis (Source: Braasch and Boonsoong, 2010)
Habitat: The larva of
E. khayengensis inhabits tropical headwater streams approximately 210 m in alt. The streams range between 6–7 m in width and 10–11 cm in depth. The water temperature ranges between 22–25°C, pH between 6.35–7.15, total dissolved solids are between 27–34 mg/L, and conductivity is between 41–53 µS/cm. The larvae are found in eroded areas of streams where moderately flowing over cobble and sandy bottom.
Distribution:
- Huai Khayeng stream (Thong Pha Phum district, Kanchanaburi province
Work cited:
- Boonsoong, B. and Braasch, D. 2013. Heptageniidae (Insecta, Ephemeroptera) of Thailand. ZooKeys 272: 61–93.
- Braasch, D. and Boonsoong, B. 2010. A contribution to the Heptageniidae (Insecta, Ephemeroptera) of Thailand and Malaysia. Zootaxa 2610: 1–26.
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narumon@kku.ac.th สาขาวิชาขีววิทยา คณะวิทยาศาสตร์ มหาวิทยาลัยขอนแก่น
