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NUMBER 557 77
inclination of convex thecal faces 30°-41°. Large specimens up
to 32 x 16 mm in calicular diameter and 22 mm in height. Two
or three pairs of long thecal edge spines on anthocyathus. Basal
scar 4-6 x 3-4 mm in diameter. GCD:LCD = 1.6-1.7. Calicular
edge slightly scalloped, the apices corresponding to the primary
septa. Septa arranged in 3 size classes, usually 20:20:40 (80
septa). Columella well developed.
DISCUSSION.—Based on the six small specimens reported
herein little can be added to my previous redescription of this
species (Cairns, 1989a) except that the anthocyathus basal scar
may attain a greater diameter of up to 8 mm.
Truncatoflabellum candeanum is distinguished from its
congeners by its very long and broad edge spines; its slightly
scalloped calicular margin; its relatively wide thecal face angle
(30°-41°);and its striped reddish brown corallum (see Cairns,
1989a, table 6).
MATERIAL EXAMINED.—New Records: TM (KT9015,
HK3), 3 including 2 anthocauli, USNM 92802, 2, ORI; TM
(KT9015, HK5), 1 anthocyathus, USNM 92803. Previous
Records: Neotype of F. candeanum; holotype of F. elegans;
F. candeanum of Marcnzeller (1888a), 1, ZMB 8194; Soyo
Maru-422 (2) and 465 (Plate 33e)(3 of 4 mentioned), TIUS
50233 and 50229, respectively (F. rubrum of Yabe and Eguchi,
1942a); Philippine specimens of Cairns (1989a).
TYPES.—The neotype of Flabellum candeanum, designated
by Cairns (1989a:71), is deposited at the USNM (81963). Type
Locality: Alb-5369: 13°48'N, 121°43'E (Tayabas Bay,
Luzon, Philippines), 194 m.
The holotype of F. elegans is deposited at the BM
(1846.7.1.58). Type Locality: ?Japan, depth unknown.
DISTRIBUTION.—Japan: Eastern Channel, Korea Strait, Honshu;
northwestern Kyushu; off Kagoshima, southwestern
Kyushu; reports off Shikoku by Yabe and Eguchi (1942b) and
Kikuchi (1968) are not verified; north of Pratas Islands, South
China Sea; 88-223 m. Elsewhere: Philippines, Celebes Sea;
70-249 m.
Truncatoflabellum formosum Cairns, 1989
PLATE 33/?,/r
Flabellum rubrum.—Yabe and Eguchi, 1942a:96-98 [in part: form A, pi. 8:
figs. 16-19, 23, 24]; 1942b:131-132 [in part: Soyo Maru-107, 540, pi. 11:
fig. 14].
Truncatoflabellum formosum Cairns, 1989a:69-70, pi. 35: figs, j.k; pi. 36: figs.
a,b.—Cairns and Keller, 1993:265. figs. 101, 1 lA.
Truncatoflabellum n. sp.: Cairns, 1989a:73, pi. 38: figs. g.h.
DESCRIPTION.—Corallum compressed, the convex thecal
faces meeting in rounded thecal edges. Angle of thecal edges,
37°-48°; inclination of thecal faces, 18°-25°. Largest specimen
known (anthocyathus from TM (CR79-18)) 26.7 x 14.5 mm in
calicular diameter and 28.9 mm in height, having a basal scar of
only 3.3 x 4.6 mm. Two pairs of edge spines usually present,
the lower pair cylindrical in cross section and pointed
downward, the upper pair much more broadly based and
oriented perpendicular to theca. GCD:LCD = 1.42-1.85. Theca
reddish brown to white, bearing very fine transverse (not
chevron-shaped) epithecal corrugations. Inside calice, 1 -2 mm
below calicular edge, theca adjacent to each of the 20 primary
septa is lightly pigmented against a white background, giving
the impression of a circumferential band within the theca.
Calicular margin smooth.
Septa arranged in 3 distinct size classes in all specimens
examined regardless of calicular diameter, accordingly:
20:20:40 (80 total septa). Primary septa nonexsert, their upper,
outer margins meeting the thecal wall in a broad, graceful arch.
Inner edges of primary septa vertical and slightly sinuous,
merging with the columella. Secondary septa half to two-thirds
width of primaries, their inner edges less sinuous and not
attaining the columella. Tertiary septa only one-quarter to
one-third width of a secondary. Fossa deep and narrow,
containing an elongate, solid columella formed from fusion of
lower, inner edges of 20 primary septa.
DISCUSSION.—Truncatoflabellum formosum differs from
other species in the genus by having a septal arrangement of
20:20:40 and having attenuate primary septa. I (Cairns,
1989a:69) previously indicated that one of Yabe and Eguchi's
(1942a, pi. 8: fig. 14) specimens of F. rubrum was T.
formosum, but, this synonymy should have read: pi. 8: fig.
16a-c.
MATERIAL EXAMINED.—New Records: Alb-4903, 4,
USNM 40789; Alb-4937, 1, USNM 40791; TM (CR79-18), 1,
USNM 92804. Pleistocene of Ryukyu Islands, 1, TIUS.
Previous Records: Types of T. formosum, USNM; Flabellum
rubrum form A of Yabe and Eguchi (1942a,b): Soyo Maru-465,
1, TIUS 50229; Soyo Maru-\0% 1, TIUS 50231; ISoyo
Marw-540, I, TIUS 50230.
TYPES.—The type series of T. formosum is deposited at the
USNM. Type Locality: Alb-5249: 7 o 06 / 06"N, 125°40 / 08"E
(Daveo Gulf, off Mindinao, Philippines), 42 m.
DISTRIBUTION.—Japan: Off Boso Hanto, Honshu; off Kii
Peninsula, Honshu; Tosa Bay, Shikoku; East China Sea off
southwestern Kyushu; Eastern Channel, Korea Strait; Sea of
Japan, Wakasa Bay, Honshu; 106-210 m. Elsewhere: Philippines,
Celebes Sea, southwest Indian Ocean; 37-933 m.
Truncatoflabellum carinatum Cairns, 1989
PLATE 33/,*
Flabellum rubrum.—Faustino, 1927:53 [in part: Alb-5311].—Yabe and
Eguchi. 1942a:96-98 [in part: Soyo Maru 222, pi. 8: figs. 6-12, 20];
1942b:131-132 [in part].
Flabellum rubrum stokesii.—Yabe and Eguchi, 1942a:98-99 [in part Soyo
Maru-295. 304].
Truncatoflabellum carinatum Cairns, 1989a:73-74, pi. 38: figs. b-e.
DESCRIPTION.—The following description is based on one
well-preserved specimen from off the Pescadores Islands (ex
CAS 74990). Corallum (anthocyathus) compressed, the evenly
convex thecal faces meeting in an acute angle at thecal edges.
Three or 4 pairs of low (about 1.0 mm in height) discontinuous