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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.

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