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105<br />
the sides of the major ones. The columella centres are 3 to 4 mm in diameter with twisted trabeculae.<br />
I S 6063 possesses twO valleys 4 .5 and 5 cm long. There are 12 to 14 septa per cm length of wall .<br />
Major septa exsert to 1.5 mm. Columella centres are not visibly linked by any lamellae. Other details as<br />
in Wa75 .<br />
Mat e ri a l :<br />
Gulf of Aqaba:<br />
Northern R. S.:<br />
T . Aviv<br />
USNM<br />
NS<br />
Wa<br />
6062 , 6063 (Eilat , paratypes).<br />
7 Sa, b (Ghardaqa, paratypes).<br />
Genus Fa via OKEN , 18 15<br />
T y pe spe c ies : Madrepo ra fragum ESPER, 1795.<br />
G e n e ric c h a r a c t e r s : Encrusting, massive or columnar. Plocoid. Corallites and calices polygonal<br />
or circular. Wall projecting with well developed intercorallite areas. Coenosteum costate. Septa alternating<br />
in width with dentate edges.<br />
Synopsis of the species of Favia known from Red Sea:<br />
1. Corallum columnar or massive . Corallites 2 to 4 mm in diameter. Septa 24 to 28. Major septa with<br />
paJiform lobes . . .... . .. . . . . ... . ... .. .. . .......... . ....... . .. . . ... . ...... F. stelligera<br />
2 . Corallum massive . Corallites 4 to 6 mm in dia meter. Wall exsert. Septa 30 to 35. Asexual reproduction<br />
by both fissio n and ext rate macular budding ... ...... . . .. . ..... . . ........ . ......... F. taxa<br />
3. Corallum massive, hillocky. Corallites 7 to 9 mm in diameter. Septa 18 to 24 , very uniform in size,<br />
with a distinct crown of paliform lobes. A second Set of septa very indistinct. Costae correspond to<br />
all speta, very regular. .... . . . . . .. . ... .. . . . . ... . ....... . ..... .. .. ...... . F. helianthoides<br />
4. Corallum massive , rounded, flat or encrusting. Corallites 5 to 11 mm in diameter, often oval up to<br />
8 x 11 mm in spread. Septa 18 to 36 . Paliform lobes mostly present. . ... . .. .. .. .. .. . . F. pallida<br />
5. Corallum hemispherical. Corallites rounded, 8 to 12 mm in diameter. Septa 24 to 35 . Walls exsert.<br />
Budding occasionally at the side of corallites. . ....... . ... . ...... . .... . ...... . F. amicorum<br />
6. CoraUum encrusting or submassive . Corallites rounded, oval or elongated. Greater diameter 10 to<br />
16 mm, 4 to 5 mm deep. Septa 25 to 40. Exo- and end othecal vesicles well developed. Perithecal<br />
costae prominent. . . .. . .. . ........... . ... .. . ....... . . .... . . ........... ... . F. speciosa<br />
7. Corallum massive , flat or rounded. Corall ites ci rcular, oval or distorted, 10 to 20 mm in diameter.<br />
Septa range from 30 to 60, of which half the number meet the columella. Peritheca 2 to 5 mm thick.<br />
Corallite walls generally very little exsert. . ......... . ...... . . . .. . ..... ... ... . .... F. favus<br />
8. Corallum explanate, very light. Corallites and cali ces polygo nal , 15 to 17 mm long, 2 to 3 mm deep.<br />
Septa 24 to 32 . Exsert ends of septa vertical, not arched . Septa subhorizomal. Wall exothecal, blistery.<br />
Costae not visible . Asexual reproduction by marginal fission . . .. .. .. .......... . .. . .. F. wisseli<br />
9 . Corallum flat or dome·shaped. Corallites large , 18 to 20 mm in diameter, mostly circular. Wall some·<br />
times projecting. Septa SO to 60 . . .......................... . . . . . . ........ . F. rotundata<br />
Favia stelligera (DANA), 1846<br />
(Plate 26, Figs. 5. 6)<br />
Orbict!lla<br />
Favia<br />
stel/igem<br />
sulUgt!1'tJ<br />
1846 , DANA . 216; pI. lO/ 9a- e (Type locality : Fiji).<br />
1918. VAUGHAN, 10 1; pis. ]412 , 3 j 3511-4 (synonymy).<br />
1952, CROSSLAND. 128.<br />
1967. SCHEER, 430.<br />
1971 . LOVA & SLOBODKIN . 124.<br />
1971 , CHEVAUER, 162; pis. 18/2; 19/ 2 (synonymy),<br />
1972. WIJ SMAN·BEST. 24; pI. 4/ l .<br />
1974, SCHEER & PI LLA!, 44 (synonymy).<br />
1976, PI LLA) & SCH EER. 55.<br />
1917. VERON . PICHON & WIjSMAN· BEST, 20; figs. 16-22.<br />
1980, HEAD. 151.456.