The materials for this study were collected by a SCUBA diver, BS Min from about 15 m deep at the Isl. Marado (Korea, Jeju-do, Seogwipo-si, Daejeong-eup, Mara-ri) on 14 Nov 2010. They were preserved in 80% ethanol and de-posited in the Department of Life Science, The University of Suwon in Hwaseong-si, Korea.
Species were identified based on morphological characters: the branching pattern, the arrangement of hydrocladia, the shape, the number of marginal teeth, the position of intrathe-cal septum of hydrotheca, the shape and the position of ne-matotheca and the type of corbula.
Permanent specimens were prepared for light microscopy examination and photographs. Photographs were taken using a microscope (E-80i; Nikon, Tokyo, Japan) and a digital cam-era (Eos 300D; Canon, Tokyo, Japan).
Phylum Cnidaria Hatschek, 1888
Class Hydrozoa Huxley, 1856
Order Thecatae Fleming, 1828
Family Plumulariidae L. Agassiz, 1862
Genus Aglaophenia Lamouroux, 1812
Stem branched or unbranched, giving rise to hydrocladia alternately. Hydrocladia unbranched. Hydrothecae sac-shap-ed, always with toothed margin, intrathecal septum developed inward hydrotheca from adcauline wall. Median inferior nematotheca partly adnate to hydrotheca and variable length. Gonothecae protected by corbula which modified hydrocla-dia. Corbula ribs bearing nematothecae but no hydrothecae.
Key to the species of the genus Aglaophenia from Korea
1. Stem fascicled, with branches and hydrocladia white-colored ··················································
- Stem unfascicled, without branches and hydrocladia white or dark brown-colored ···············································2
2. Colonies arising in aggregate ······················
- Colonies arising in separate ········································ 3
3. Colonies large, up to 140 mm long and dark brown-colored ······································································
- Colonies small, up to about 12 mm long and white-colored·····························································
1*Aglaophenia latecarinata Allman, 1877 (Fig. 1A-F)
[Fig. 1.] Aglaophenia latecarinata. A Colonies on the stems of sea plant; B Stem with hydrocladia; C Lateral view of enlargedhydrotheca; D Part of colony; E Basal portion of stem; F First node of stem and hydrocladium. Scale bars: A=5 mm B E F=100μm C=50 μm D=250 μm.
283, fig. 98a-d.
Material examined. Korea: Jeju-do, Seogwipo-si, Daejeong-eup, Mara-ri, Isl. Marado, 14 Nov 2010, Min BS, collected by SCUBA diving from about 15 m deep.
Description. Colonies attached on the stem of the sea plant, small, up about 12 mm long, pinnate, white colored (Fig. 1A). Stem monosiphonic, unbranched, arising at intervals from a delicate creeping stolon, with two hinge joints separating a short basal part from a distal part bearing alternate hydrocla-dia. Basal part bearing a row of large median nematothecae only (Fig. 1E, F). Distal part divided into regular internodes, each internode with one hydrocladium, two or three nemato-thecae to each hydrocladial apophysis. Hydrocladia arranged in alternate, not in one plane, shifted onto the anterior surface (Fig. 1D). Hydrocladium divided into regular internodes, each internode with one hydrotheca and two distinct septa (Fig.1B). Hydrothecae on the anterior surface of hydrocladium, sac-shaped, margin with nine marginal teeth: one median abcauline and four pairs laterals. Median abcauline tooth was bifid, with a broad keel extending along the front of the hy-drotheca from its margin to the mesial inferior nematotheca (Fig. 1C). Three kinds of nematothecae present: median inferior nematotheca at in-ferior of hydrotheca, adnate to abcauline wall up to level of intrathecal septum, remainders free; a pair of laterals at superior both sides of hydrotheca, curved, not reaching thecal margin (Fig. 1C) and cauline nematotheca on stem. All nematothecae sac-shaped. Corbula have not been observed.
Remarks. This species was demonstrated to be
Distribution. Korea, Japan, Caribbian Sea, North Atlantic, and South Africa.
Korean name: 1*능선깃히드라 (신칭)