On two rare abyssal Myriotrochidae (Echinodermata: Holothuroidea: Apodida) new to the South Atlantic: Siniotrochus myriodontus Gage and Billett, 1986 and Neolepidotrochus parvidiscus angolensis subsp. nov.

In the course of the DIVA 1 expedition (RV “Meteor”, cruise M48/1) to the Angola Basin (South Atlantic) two myriotrochid holothurians were collected at abyssal depths - Neolepidotrochus parvidiscus angolensis subsp. nov. and Siniotrochus myriodontus Gage and Billett, 1986. The latter, until now, was known only from few specimens from the north-eastern Atlantic Ocean. This new record of S. myriodontus for the South Atlantic Ocean indicates a wide geographical distribution. Both species are described in detail, including parameters for the wheel deposits.