Acropora tortuosa (Dana, 1846)

(Fig. 107)

Madrepora tortuosa Dana, 1846: 467, pl. 37 fig. 3.

Madrepora implicata Dana, 1846 p.466, pl. 37 fig. 2.

Type locality. Fiji (lectotype NMNH-SI).

MTQ Holdings. Indonesia: G57005; Australia: G34135, G64773 Great Barrier Reef; G33179–85, G33188, G33192, G34126–34, G34163, G34418–28, G35995, G51301, G54884, G56981, G58778, G59369–70, G60144–47, G60391 South–East; Micronesia: G41084, G62646; Solomon Is.: G35595–97; New Caledonia: G30929, G40886, G54685, G58696, G59167, G61208; Marshall Is.: G56150–51, G57154–61, G57225–31, G57335–38; Kiribati: G32868, G33112, G33114, G54803, G54822–23, G54965, G59674; Fiji: G58963–64; Niue: G35850; Cook Is.: G32857, G35701, G35704, G35719, G55541, G55542; Austral Is.: G32855.

Description. Colony outline: indeterminate, predominantly arborescent. Branches: tertiary

branching order present; length:>1 0 0 mm; diameter: 5.0–9.9 mm, radial-dominated, terete; radial crowding: not touching; axial/radial ratio:>1:10. Axial corallites: two synapticular rings; porous; outer diameter 2.5–3.2 mm; inner diameter 1.0–1.3 mm; primary septa to 2/3 R. Radial corallites: medium; two synapticular rings; one size or graded; inner wall developed; shape: tubular; openings: oval-rounded; primary septa to ¼ R. Coenosteum: same on and between radials: reticulate; spinule shape: blunt irregular.

Further literature. Wallace (1999), Veron (2000).