roseola in Monniot F. & C. (1996) S. roseola ( Millar 1955 ) S. murrayi Kott,1957 S. australensis Kott, 1990 S. bellissima Kott, 1990 Ascidians (Tunicata) of the French Guiana Expedition Monniot, Françoise Zootaxa 2016 4114 3 201 245 Millar, 1955 Millar 1955 [151,520,152,178] Ascidiacea Stomozoidae Stomozoa Animalia Enterogona 14 215 Chordata species roseola   Stations.CP4357; CP4399. In single or fused lobes the colonies are 4 to 6cmlarge, hard, cartilaginous and opaque. The surface is convoluted with spaced holes of the siphon apertures. The narrowed but thick basal part wears some epibionts. One colony remains pink in formalin with brown siphonal apertures ( Fig. 10A). The zooids are difficult to remove from the dense tunic. The largest are 17mmlong of which the thorax is 6mm. The posterior vascular processes are long. Both siphons have 6 fringed lobes, the oral one apical and the atrial at a short distance below. Both have an internal velum. There are numerous oral tentacles. The longitudinal muscles issued from each siphon run obliquely over the thorax and extend in 2 bundles along the whole abdominal length. Transverse muscular fibres are dense on the whole thoracic wall. The pre-pharyngeal band in a single rod is not indented dorsally. The button-like dorsal tubercle opens in a vertical slit. The rapheal languets are long and thin. The branchial sac ( Fig. 10B) contains 24 to 26 stigmatal rows the posterior ones sometimes not complete. There are no longitudinal vessels. The digestive loop is straight. The olive-shaped stomach with a smooth wall is separated from the tubular intestine by a constriction. The male and female gonads are located inside the gut loop behind the stomach. A long sperm duct follows the rectum. No larvae were found. No spicules have been detected in the tunic.   FIGURE 10. Stomozoa roseola. A, colony in formalin; B, branchial sac. Scale bar =2.5 mm.  Millar (1955)described for the first time  Clavelina roseolafrom South Africaadding in Millar,1962additional characters depicted from newly collected material. In his later publication (1962) he stated that  Stomozoa murrayi Kott, 1957became a synonym of his species but did not recognize the genus  Stomozoa. Surprisingly Millar (1977)identified as  Stomozoa murrayispecimens collected from the Brazilian coast down to 60mdepth. After his description the characters are the same as in  S. roseolaexcept the presence of atypic spicules in the tunic.  Millar (1977)suggested that the specimens tentatively named  Diazona gigantea? by Monniot C. & F. ( 1969– 1970) from northern Brazilcorrespond to  S. roseolabut they belong to the genus Diazonahaving longitudinal vessels. Material from New Caledonianamed  S. murrayiin Monniot F. (1988), specimens from Indonesianamed S.    roseolain Monniot F. & C. (1996)and material from the south of Madagascar( Monniot F. 2012) all correspond in all characters to  S. roseola( Millar 1955),  S. murrayi Kott,1957being a junior synonym to this species. Both Australian species  S. australensis Kott, 1990and  S. bellissima Kott, 1990differ by a branchial sac with far fewer stigmatal rows.