Boninastrea Yabe & Sugiyama 1935

Boninastrea est un genre de coraux durs de la famille des Meandrinidae.

Boninastrea is een geslacht van neteldieren uit de klasse van de Anthozoa (bloemdieren).

'Corallum compound, massive; calicular surface strongly convex. Epitheca indicated by fine ringlets of growth, thin, conspicuous, covering almost entirely underside. Calices numerous, subpolygonal, irregular in shape and arrangement oblique; usually one to three or more in number circumscribed in group by incomplete, oblique collines. Occasionally several of the groups are further bounded by prominent, incomplete, oblique ridges. In each group calices connected by trabecular bridges instead of toothed lamellae. Septa not numerous, up to three cycles, those of the first and some of the second cycles more stout and more prominent than others; their free ends strongly divided in irregular manner, to filiform processes. Surface of septa minutely granulated. Columella absent? Dissepiments numerous, vesicular. Growth by fission.' (Yabe and Sugiyama, 1935: 402)

Colonial, with intracalicular budding only. Corallites monomorphic and uniserial; monticules absent. Walls fused. Calice width medium (4–15 mm), with medium relief (3–6 mm). Costosepta confluent. Septa in < 3 cycles (< 24 septa). Free septa present but irregular. Septa spaced 6–11 septa per 5 mm. Costosepta unequal in relative thickness. Columellae trabecular but compact (1–3 threads) or absent, < 1/4 of calice width, and continuous among adjacent corallites. Paliform (uniaxial) lobes weak or absent. Epitheca well developed and endotheca abundant (vesicular).