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PDF - Eprints@CMFRI

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74<br />

Dis t rib ut a tiD n : Red Sea; Somaliland ; Providence Isis.; Aldabra; Reunio n; Mauritius; Maldives;<br />

Palk Bay; Ceylon; Mergui Archipelago (DUNCAN , 1889).<br />

Superfamily Fungiicae DANA, 1846<br />

Family Fungiidae DANA , 1846<br />

Key to the genera of the fa mily Fungiidae from Red Sea:<br />

A. Corallum discoidal, axial fossa short and monocentric, frec at adult stage.<br />

I. Corallum not more than 5 cm in diameter. Disc imperforate. Costae and septa with small grainlike<br />

teeth ....... . . .. . .............. . ............ . ........ .. .......... Cycloseris<br />

2. Corallum larger than in I ., sometimes oval. Septa and costae pro minently dentate. Rarely secondary<br />

mouths are developed at the oral side . .. . ... . ........ . .. ... . .. . .. ............. Fungia<br />

B. Corallum elongare, with a long axial furrow, free at adult stage.<br />

3. The axial furrow mono- or polycentric. Septa alternating in size. Septa of lower cycles run uninterrupted<br />

from the axial furrow to the periphery of the coraHum. No lateral calices . ....... Ctenaetis<br />

4. The axial furrow always polycentric. Septa short, those originating from t he axial fossa never<br />

reach the periphery of the corallum . La teral calices present. ... ..... . ....... . . .. Herpolitba<br />

C. Corallum foliaceous, plate- or bowl-shaped, and fixed in ad ult stage.<br />

; . Second ary calices numerous. ...... .. ... .. .......... . ................. .. . Podabaeia<br />

Genus Cycloseris MIL E EDWARDS and HAIJ\I E, 1849<br />

Type s species : Fungia eyclolites LAMARCK , 1801.<br />

G e n e ric c h a r act e r s: Solitary in adult stage. Discoidal or in diaseris form . Corallum imperforate.<br />

Very young stages in some species hexagonal. Costal granulation well developed. Adult ones ge nerally<br />

attain a size of more or less 5 cm in diameter.<br />

The six species discussed in this 1V0rk ca n be separated as follows:<br />

A. Corallum flat , thin. Scar of attachment often visib le .<br />

a) First two cycles of septa increase in height towards the centre of the disc and become highly<br />

exsert around the axial fossa .<br />

1. Septa comparatively thin, edges of septa sharp. Costae regularly radiating from the centre ....<br />

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . c. pa tel/ifomlis<br />

b) First two cycles of septa moderately increasing in height around the fossa. Costae low, at the<br />

margi nal part of the disc more distinctive.<br />

2. Septa comparative ly thick, edges of septa rounded ..... .. . ... . .. ........ C. doederleini<br />

3. Septa thin , edges of septa lacerated ... .... . ........ . . ... . .... ....... . .. C. ef erosa<br />

B. Corallum conical thick. Scar of attachment in most cases not visible. Major septa exsert.<br />

a) Costae alternating in size .<br />

4 . Corall um in cycloseris or diaseris form . Disc increasing in thickness towards the centre. Septa<br />

thickened , edges blunt, sides highly granular. Columella papillary .......... . ... C. distorta<br />

5. Corallum perceptibly oval, underside concave .. ' .. . " .. ... .. ......... .. . . C. eyclo/ites<br />

b) Costae equal in size .<br />

6 . Corallum circular, underside flat or slightly concave . .. ........... .. ...• . . . C. eostu/ata<br />

Cycloseris patel/ifon"is (BOSCHMA), 1923<br />

( Pl atr 16 , Fig. I)<br />

FunglQ<br />

Cycloseris<br />

patelliform is 1923. BOSC HMA . 136; pI. 919, II, 13 - 16a.<br />

1925 . 8 0SCHMA, 192; pl. 5/ 12- 14. 21.<br />

1952. CROSSLAND. 154 , pLl6Il.<br />

patelliform ;s 1954. WELLS, 447; pI. 157/ 1-3.

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