PEÑALVA-ARANA, Carolina D., and Marina MANCA. 2007. “An SEM Study of the Nuchal Organ in Daphnia Himalaya (nov. Sp.) Embryos and Neonates Collected from the Khumbu Region (Nepalese Himalayas)”. Journal of Limnology 66 (2):153-59. https://doi.org/10.4081/jlimnol.2007.153.