Table 3. Distribution of the currently considered valid species of the genus Umbellula Cuvier, 1798.

Species	Presence of sclerites	Distribution	Main references
Umbellula encrinus (Linnaeus, 1758)	No	Arctic Ocean	Linnaeus 1758; Kükenthal 1911, 1915; Williams 1995
Umbellula thomsoni Kölliker, 1874	Yes	Cosmopolitan	Kölliker 1874; Kükenthal 1911, 1915; Williams 2011
Umbellula carpenteri Kölliker, 1880	No	Antarctic Ocean, Antarctic Indian Ocean	Kölliker 1880; López-González & Williams 2011
Umbellula durissima Kölliker, 1880	Yes	North Western Pacific Ocean, East Indian Ocean, North Atlantic, West Atlantic and South Atlantic Ocean, Antarctic Ocean	Kölliker 1880; Kükenthal 1915; Broch 1958; Williams 1995
Umbellula huxleyi Kölliker, 1880	No	North Pacific Ocean, East Indian Ocean, North Atlantic and South Eastern Atlantic Ocean	Kölliker 1880; Kükenthal 1915; Broch 1958; Williams 1995; López-González & Williams 2011
Umbellula pellucida Kükenthal, 1902	No	North Indian Ocean	Kükenthal 1902, 1915; Broch 1958; Williams 1995
Umbellula spicata Kükenthal, 1902	No	Indian Ocean	Kükenthal 1902, 1915; Broch 1958; Williams 1995
Umbellula monocephalus Pasternak, 1964	Yes	North Atlantic Ocean, Indian Ocean	Pasternak 1964; Williams 1995; López-González & Williams 2011
Umbellula hemigymna Pasternak, 1975	No	Caribbean Sea	Pasternak 1975; Williams 1995
Umbellula pomona sp. nov.	Yes	South Atlantic Ocean, Mar del Plata Submarine Canyon	This paper