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NUMBER 557 45<br />

spaces, and in having clavate, not triangular, septal teeth.<br />

ETYMOLOGY.—The species name frustum (Latin frustum,<br />

meaning "a bit," or "part"), refers to the corallum shape. In<br />

geometry, a frustum is the solid figure formed when the top of<br />

a cone is cut off by a plane parallel to the base, which is the<br />

shape of the corallum of this species.<br />

MATERIAL EXAMINED (Types).—Holotype: TM (KT9202,<br />

OS2), USNM 92668 (Plate \9a,b). Paratypes: TM (KT9202,<br />

OS2), 4, USNM 92669 (Plate \Sg-i), 1, ORI. Type Locality:<br />

3O°59TM, 13O°32"E (Osumi Strait, southern Kyushu),<br />

237-241 m.<br />

DISTRIBUTION.—Known only from the type locality.<br />

Suborder CARYOPHYLLIINA<br />

Superfamily CARYOPHYLLIOIDEA<br />

DIAGNOSIS.—See Part 1.<br />

Family CARYOPHYLLIIDAE<br />

Caryophyllia Lamarck, 1816<br />

Subgenus Caryophyllia (Caryophyllia) Lamarck, 1816<br />

DIAGNOSIS.—See Part 1.<br />

Caryophyllia (C.) japonica Marenzeller, 1888<br />

PLATES 4/, 19c-/<br />

Caryophyllia (C. japonica Marenzeller, 1888b: 16.—Yabe and Eguchi,<br />

1941b:102; 1942b:119, pi. 10: figs. 1-3.—Eguchi, 1965:285, 2 figs.;<br />

1968:C31-32, pi. Cl 1: figs. 4-6, 10-29; pi. C23: figs. 7-9; pi. C25: figs. 5,<br />

6; pi. C29: figs. 6, 7.—?Kikuchi, 1968:8, pi. 5: fig. 8.—Eguchi and<br />

Miyawaki, 1975:56.—Song, 1982:134, pi. 2: figs. 3-5; 1988:27, pi. 3: figs.<br />

9-11; 1991:132-133.<br />

Caryophyllia ephyala.—Yabe and Eguchi, 1932a:388, 389.<br />

Caryophyllia arcuata.—Yabe and Eguchi, 1936:167.—Eguchi, 1938, table 2.<br />

Caryophyllia alaskensis.—Keller, 1981a:21 [in part: Vifyaz-2078, 3353, 5592,<br />

5640], pi. 2: fig. 1.<br />

Caryophyllia ambrosia.—Keller, 198la: 15 [in part: V/ryaz-5638].<br />

DESCRIPTION.—Corallum robust, ceratoid to trochoid, and<br />

firmly attached by a relatively slender pedicel: PD:GCD =<br />

0.25-0.39. Calice circular to elliptical. Largest corallum<br />

examined (Alb-4982) 17.8 x 16.0 mm in calicular diameter and<br />

18.4 mm in height, with a pedicel diameter of only 6.7 mm.<br />

Theca thick. Cl-3 sometimes slightly ridged near calice;<br />

otherwise, costae are flat with low, rounded granules or<br />

porcellaneous in texture. Corallum white.<br />

Septa hexamerally arranged in 4 complete cycles according<br />

to the formula: S1_2>S3>S4. S^ moderately exsert (1.5-2.1<br />

mm) and have straight, vertical inner edges that merge with the<br />

columella low in fossa. S3 70%-75% width of Su2, less exsert<br />

(about 1 mm), and have sinuous inner edges. S4 less exsert and<br />

slightly less wide than S3. A crown of 12 slender, lamellar but<br />

sinuous pali occurs before the S3, each palus 1.5-2.0 mm in<br />

width.<br />

Fossa of moderate depth. Columella well developed,<br />

composed of a large elliptical field of 10-20 fused, twisted<br />

elements. The previous description was based primarily on<br />

specimens from Alb-4982 and the two syntypes.<br />

DISCUSSION.—Three species—Caryophillia japonica, C.<br />

alaskensis and C. arnoldi—form a closely related group that<br />

might well be considered as geographic subspecies of one<br />

species: C. japonica, known from Japan to the Commander<br />

Islands; C. alaskensis, from the Commander Islands (at<br />

shallower depths) to British Columbia; and C. arnoldi, from<br />

Prince William Sound, Alaska to the California Channel<br />

Islands. Caryophyllia japonica differs from the geographically<br />

adjacent C. alaskensis in much the same ways that C. arnoldi<br />

differs from C. alaskensis. Caryophyllia japonica has a more<br />

robust corallum; consistently 48, more highly exsert septa; and<br />

S4 that are only slightly less wide than the S3. Caryophyllia<br />

japonica is almost indistinguishable from its trans-Pacific<br />

cognate, C. arnoldi, differing only in having a narrower<br />

pedicel.<br />

MATERIAL EXAMINED.—New Records: Alb-4982, 13,<br />

USNM 82158, 2, ORI; Alb-5088, 1, USNM 92676; Alb-5093,<br />

1, USNM 92677; Academik Keldish-23\2, 4, IOM. Previous<br />

Records: 2 syntypes of C. japonica; specimens reported as C.<br />

alaskensis by Keller (1981a) from: Vityaz-2QH% (IOM), 3353<br />

(USNM 92678, Plate 19c,/), and 5640 (IOM); specimen<br />

reported as C. ambrosia by Keller (1981a) from V/fyaz-5638,<br />

IOM (Plate 40.<br />

TYPES.—Two syntypes (Plate \9d,g,i) of C. japonica are<br />

deposited at the NMW (8168). Type Locality: "Enosima,"<br />

Japan, depth unknown. Although there are several Enosima's<br />

(= Enoshima) listed in a Japanese gazetteer, the most likely is<br />

the one in Sagami Bay.<br />

DISTRIBUTION.—Throughout Japanese waters from Ishikari<br />

Bay, Hokkaido to southern Kyushu, including both Pacific and<br />

Sea of Japan coasts; off Cheju Island, Korea Strait and Sea of<br />

Japan off South Korea; Pacific coast of Kurile Islands;<br />

Commander Islands, Bering Sea; 77-1680 m, with a tendency<br />

to occur deeper in the northern range.<br />

Caryophyllia (C.) alaskensis Vaughan, 1941<br />

ACCOUNT.—See Part 1.<br />

Caryophyllia (C.) sp. cf. C. scobinosa Alcock, 1902<br />

PLATES 19/-/, 20a.*<br />

Caryophyllia scobinosa Alcock, 1902a:90; 19O2c:8, pi. 1: figs. 2. 2a.—Yabe<br />

and Eguchi. 1942b:119-120 [in part; not pi. 10: fig. 5].—Utinomi, 1965:<br />

254.—Eguchi, 1965:285. fig.—Cairns and Keller, 1993:235 [synonymy].<br />

Caryophyllia cf. scobinosa.—Utinomi, 1956:42.<br />

DESCRIPTION OF SPECIMENS FROM TM (KT7911, OT4).—<br />

Corallum ceratoid, free, and curved about 45. Corallum 10.4<br />

mm in calicular diameter, 17.9 mm in height, and 1.7 mm in<br />

pedicel diameter. Costae flat and granular, separated by narrow<br />

intercostal striae. Corallum white. Septa hexamerally arranged

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