PDF - Eprints@CMFRI

62
X2: 10-14 is a cluster of folia , fro nds only 1.5 em wide. The details of calices as in EC 361. In both
the specimens the ambulacra are flat.
Mate r ial:
Southern R. S. : HLM EC 36 1 (Massawa).
X2: 10- 14 (Sarso Isl.).
D is t r ib u t i 0 n: Red Sea; Somaliland ; Madagascar; Rodriguez (as P. lata); Reunio n; Gulf of Mannar
(PI LLAI, 1972); Cocos-Keeling Isis.; Andamans (MATfHA I, 1924); Mergui Archipelago; Str. of Malacca;
East Indies ; Ph ilippines; Palau Isis.; Caroline Isis.; Great Barrier Reef; Fiji; Samoa.
R emarks: VAUG HAN (1918) thought P. angularis and P.laxa of KLUNZ INGER are the same as
P. danai MI L E EDWARDS & HAIM E, while HOR T (1921) only identified laxa with danai and considered
P. angularis a synonym of P. decusSllta. HOFFME ISTER (1925) merged P. danai with P. decussata, a course
which helped VAUGHAN and HORST in uniformity. CROSSLAND (194 1), while writing on FORSKA L'S
corals, fe lt that decussata and danai are different and agreed that FOR KAL's cactlls is the same as P. danai
(vide infra!. We feel P. angularis is more or less the same as P. decussata , while P. danai is the same as
P. cactus.
DA A'S types of P. crassa (USNM 222 and 22 3) differ from his P. lata (type USNM 194) in t he
possession of thicker and heavier fronds. I n both the ambulacra are flat without conspicuous carinae.
P. decussata is said to differ from lata and crassa in the presence of better developed carinae. However,
in P. crassa are signs of carinae similar to that of P. decussata. From a study of a good suite of specimens
of foliaceo us Pavona from various parts of the Indo-Pacific we are tempted to believe that P. cra ssa and
P. la ta are only skeletal variants of P. decussata .
Pavona cactus (FORSKAL) , 177 5
(Plate 12. Figs. S, 6)
Aladreportl caclUS 1775. FORSKAL. 134 (Type locality : Red Sea).
Pavonjg cactus 1834 , EHRENBERG. 329.
1879. KLUNZ INGER 3. 73; pI. 9/2.
1906. v. MARENZELLER. 90; pI. 23 /77.
Pavona cactus 1918. VA UGHAN , 136: pI.S6/ 1.1a (= [on"osaDANA).
1936. YASE. SUGIYAMA & EGUCHI. 56; pI. 4111 - 3.
1967, SCHEER. 427.
1980. VERON & PICHON, 8; figs. 5-15; 730.
1980. HEAD. H9.447.
Lophoseris cactus 1860, MJ LNE EDWARDS (& HAl ME), 68.
Pavona danai 1918 , VAUGHAN , 136; pI.SSI2:S612,2a.
1941 . CROSSLAND. 41 ; pl. 7.
1952, CROSSLAND. 161.
1954, ROSS I. 42.
1967, SC HEER. 427.
1974, MERGNER & SCHUHMACHER . 265.
1980. HEAD. H9. 448.
deCUSSD1Q 1927 , FAUSTINO. 20+; pI. 67/ 2, 3 (same specimen as VAUGHAN's figs. 2. 2a or pI. 56).
Pavonw pr{J~tortil 1846. DANA. 325 ; pI. 22/5, Sa.
Pavona praetona 1921, v. d. HORST. 76 (synonymy).
1936. YASE. SUGIYAMA & EGUCHI. 58; pl~ 4118; 42/8, 9 ; 44/ 2.
1955 . NEMENZO. 14; pI. 2/2.
Pavonia venusta 1846. DANA, 326.
Pavona venvsta 1918. VA UGHAN. 136.
1922. v. d. HO RST. 418; pl. 3111.2.
1967, SCHEER, 427; fig. 7.
EC 360 is a corallum with a greater spread of 12 cm. Fronds bifacial, larger ones up to 6 cm broad at
the middle; summits divided , curled, growing edges thin (J mm), maximum thickness at the base 4 mm.
Calices arranged in series, distance between adjacent columella centres 1 to 1.5 mm , distance between
series 3 to 4 mm. Calices shallow, 16 to 18 septo-costae around, strikingly alternating; edges of septa
minutely serrated, sides gra nular. In older calices a central solid style represents the columella. Ambulacra
flat or slightly rounded.