4 partial cytochrome oxidase subunit I mitochondrial DNA gene sequences of two Malaysian sea cucumber (Echinodermata: Holothuroidea) species i.e. Holothuria (Mertensiothuria) leucospilota (Brandt, 1835) and Stichopus horrens Selenka, 1867 - Kamarudin, Kamarul Rahim; Ngah, Nurziana; Tengku Abdul Hamid, Tengku Haziyamin; Hashim, Ridzwan; Darnis, Deny Susanti (2013)