Montipora verrucosa
Diagnosis
Original diagnosis : Corallum may he either thick, explanate, and incrusting, or massive, the thick hut narrow free edge being supported by an epitheca. The former method of growth, by the continued incrusting of previous irregular growths, may result in the formation of clumps of irregular, stout, branching processes; or, again,by the edge creeping under the growing mass, free, rounded coralia are formed. witht)ut definite points of attachment, and completelj' covered by the coral.
In the massive method of growth the corallum thickens by the steady growth of the coenenchyma in the more central regions of the colony. Calicles numerous, conspicuous as open holes, large (about1.0 millimeters), deeply immersed, except near the growing edges or on surfaces which have grown in unfavorable positions; in these cases the calicles are smaller and open on the smooth surface of the coenenchyma. Two and sometimes three cycles of short, thick septa, more or less equally developed, projecting but a very little way into the polyp cavity, and leaving a large open fossa, in the depths of which the septa fuse to form an irregular columella, .\djoiiiing calicles are sometimes separated from one another by a single thin, perforated plate. Tabulae may be formed in the lengthening
calicles of massive growths. The coenenchyma shows the usual streaming layer, which bends upwaid toward tlie surface, attaining in the massive forms a great thickness (6 to 7 cm.). This reticulum is slightly echinulate at the surface. The interstices usually swell up into nearly symmetrical nipple-shaped papillae from 2 to 3 mm. high and 2 mm. thick. These papillae exactly till up an interstice, tiieir walls descending directly into the polyp cavities. They are variously developed, sometimes crowded, and irregularly swollen and fused. As the corallum thickens in the massive forms the polyp cavities fill up with a very loose open ti.ssue (columella formation) which is in marked contrast to that of the solid reticulum, which streams so directly upward as here and there almost to suggest the presence of trabecule.
Original description
Reference(s)
Observation site(s)
SYMBIONTS
Association with... | Region origin | Name of site | In reference... |
---|---|---|---|
Symbiodinium sp. | Hawai | O'ahu | (1991) |
Symbiodinium sp. | Okinawa |
Closely related Symbiodinium spp. differ in relative dominance in coral reef host communities across environmental, latitudinal and biogeographic gradients. Marine Ecology Progress Series 284:147 - 161. doi: 10.3354/meps284147 (2004) |
|
Symbiodinium sp. | Phuket |
Long-standing environmental conditions, geographic isolation and host-symbiont specificity influence the relative ecological dominance and genetic diversification of coral endosymbionts in the genus Symbiodinium. Journal of Biogeography 37:785 - 800. doi: 10.1111/jbi.2010.37.issue-510.1111/j.1365-2699.2010.02273.x (2010) |