Some ascidians from the southern coast of Madagascar collected during the “ AtimoVatae ” survey Author Monniot, Françoise text Zootaxa 2012 3197 1 42 journal article 45406 10.5281/zenodo.246182 4c036a63-9718-48de-97a2-f29c5976eb99 1175-5326 246182 Pseudodistoma arborescens Millar, 1967 Pseudodistoma arborescens Millar, 1967 : 359 Fig. 1 , Madagascar . Monniot F.1987 , New Caledonia . Stations. TA 28 (MNHN A1 PSE 80). Madagascar , Nosy Be, 28m , 13/07/1992 , Laboute col. (MNHN A1 PSE 33) Maldives , 04° 12.94 N –73° 29.04 E , 7m , 23/09/1997 , CRRF col. (MNHN A1 PSE 49) The colonies are made of a bush of lobes erect on sandy stalks, exactly as described and figured by Millar (1967) . The bulbous top of a zooid is about 5mm in diameter, the stalk reaches 20mm . In formalin the zooids removed from the tunic are yellow and the testis lobes are often pink. The post-abdomen is particularly long, the ovary is far from the abdomen and the testis vesicles lie behind the ovary but do not reach the extremity of the postabdomen. A long vascular process penetrates into the common peduncle of the colony lobes. No larvae have been found. The geographic distribution is wide: Madagascar and Maldives in the Indian Ocean and New Caledonia in the south-west Pacific.