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133<br />
Genus Cyphastrea MILNE EDWARDS and HAIM E, 1848<br />
T y pes pe e i e s: Astrea microphthalma LAMARCK, 1816.<br />
G e n e ric c h or act e r s : Encru sting , massive or ramose. Corallites circular, level or project ing ,<br />
I to 3 mm in diameter. Septa in three cycles. Coenosteum spiny. Columella trabecular.<br />
Key to the species of Cyphastrea from Red Sea:<br />
I . Corallites I to 1.5 mm in diameter. Ten septa generally unite wit h the columella. Third cycle of septa<br />
incomplete. . .... . ...... ... .. . . . . .. ...... . ..... . .. . ............... C. micTophthalma<br />
2 . Corallites 1.5 to 2.5 mm in diameter. First twO cycles of septa unite with the columella. Third cycle<br />
of septa in full complement .......... . ........... .. ... . ... ........... . ... . .. . C. serailia<br />
Astrea<br />
Cypboslrea<br />
Explanaria<br />
Cypbastrea<br />
Cyphastrea microphtbalma (LAMARCK), 1816<br />
(Pl alt' 32. Figs. 1. 2)<br />
microphlb(J/ma 181 6, LAMARCK 2, 261 (TypC' locality : Nouvelle-Holiand C>.<br />
micropbtbalma 19 14 . MAITHAI.43 ; pls. 716 ; 1214 - 9: 13/ 1, 2, 7; 34/4 (synonymy).<br />
1941. CROSSLAND. 46.<br />
aspera<br />
galaxiol<br />
savignyi<br />
1952. CROSSLAND. 118.<br />
1954 . ROSSI. H .<br />
1971 . LOVA & SL080DKIN. 124.<br />
1974. MERGNER & SCHUHMACHER. 264.<br />
1974. SCHEER 8< PILLA I. 54 (synonymy).<br />
1975. CHEVALIE R. 9, pIs. 1/1 , l 712- 7.<br />
1976. PILLAI & SCHEER. 6 1.<br />
1977. VERON. PICHON & WIJSMAN ·BEST. 176: figs. l50- l56.<br />
1980. HEAD. 152. 460.<br />
1980. WIJ SMAN·BEST. 24l, pI. 1/4.<br />
1886. QUELCH. 107 , pI. 41l . 3>.<br />
1834. EHREN BERG . 306.<br />
1857. MILN E EDWARDS (& HAlME ). 485.<br />
1879. KLUNZINGER 3. 51 , pl. 5/7.<br />
1906. Y. MAR ENZELLER. 87.<br />
sera ilia 1879. KLUNZINGER 3, 52 : pis. 5/4 ; I0/ 12a, b.<br />
We have a fair suite of specimens of the present species. MOSt of them are typical as described by<br />
MATTHAI (19 14) with calices ranging from I to 1.5 mm in diameter and with sol id coenosteum. Mostly<br />
ten, rarely nine or eleven septa unite the columella , the total number of septa range from 18 to 22,<br />
mostly 20. In very few cases all the tertiaries are developed.<br />
Four of the present speci mens deserve special mention, particularly in view of their pecular corall ites.<br />
PW 71 344 and SLR li n arc small encrustations. The corallites are projecting, mammiform, basal thickness<br />
2 to 4 mm, less at the top. Total height 3 to 4 mm . Calices circular or ova l, 1 to 1.5 mm in diameter.<br />
Distance between adjacent corallites 2 to 5 mm . Calices shallow. Total septa 20, of which 10 of the larger<br />
ones unite the columella. Costae extend over the wall , marked by a row of fine spines. The intercorallite<br />
area is blistered .<br />
X2 : 2- 27 is a submassive hemispherical corallum with a greater spread of 4 em. The corallites are<br />
projecting, but they are not conical in outline. Septa 10 plus 10. Costae very conspicuous forming ridges<br />
along t he wall.<br />
The fourth speci men, PW 7 3 548, has corallites resembling X2 : 2- 27, but the calices are larger, up<br />
to 2 mm in diameter. Septa 9 plus 9, or 10 plus 10. Coenosteum very solid and spiny.<br />
Though these fo ur specimens are apparently different in the form of coraHites from the typical<br />
5pecimens of microphthalma we have studied, we do not think that these specimens should be treated<br />
separate. The nature and details of calices and septa show no difference from C. microphthalma. In having<br />
conical elevated calices they approach to a condition of C. japonica, but the latter has a typical ramose<br />
growth.