Dendrophyllia arbuscula, van der Horst, 1922

Lam, Katherine, Morton, Brian & Hodgson, Paul, 2008, Ahermatypic corals (Scleractinia: Dendrophylliidae, Oculinidae and Rhizangiidae) recorded from submarine caves in Hong Kong, Journal of Natural History 42 (9 - 12), pp. 729-747 : 732-733

D. arbuscula van der Horst, 1922

( Figure 1E–I ) Dendrophyllia arbuscula Van der Horst, 1922:105 , Plate 8, Fig. 6 Dendrophyllia arbuscula Eguchi, 1968 :C55, Plate 21, Figs 5 and 13; Yabe and Eguchi 1942:162, 166–167; Phillal and Scheer 1974:426, Fig. 7a; Song 1991:136, Plate 1, Fig. 4 , Plate 3, Fig. 1 ; Ogawa and Takahashi 1995:17, Plate 1, Figs 1 –7

Description

Dendroid colonies which bud near the calicular margin. The oldest and main branch is prominent, with side branches developed by budding. The budding branch is at, right angles to the original branch. A corallite sometimes bears two to four buds at the same time. Corallite thinner near base than calice margin. Calice circular to slightly oval,, 7.9–11.6 mm in longer diameter. Finely granulated, rectilinear ribs extend to the base of the colony. Rows of perforations present in intercostal furrows. Septa in four cycles. Ventral septa in five cycles. S 1 is entire, granulated, slightly exsert and larger than the others. S 2 slightly shorter and thinner than S 1. S 3 septa are very small and unite with those of S 4 to create a dentate edge. Columella well developed and trabecular.

Type locality

2.3 miles N. 63 W. from the north-point of Nuhu Jaan, Kei-Islands, depth 90 m and Kulewatti-(sollot-)bay, Dammer Island , depth 45 m.

Distribution

Korea ( Song 1991), Japan (30 m) ( Ogawa and Takahashi 1995), Conic Island and Steep Island Caves, Hong Kong (this study).

Figures

Figure 1. Balanophyllia sp. and Dendrophyllia sp. A–B, calicular (longer diameter56.5 mm) and side view of four solitary corallites of B. eguchii (maximum height59.02 mm); C–D, calicular (longer diameter514.9 mm) and top view of a B. ponderosa colony (height531.3 mm); E–G, calicular (longer diameter57.8 mm) and side views of two colonies of D. arbuscula (colony size of F and G535.1 mm and 40.1 mm, respectively); H–I, top and side views of a small D. arbuscula colony (height518.2); J–L, calicular (longer diameter511.7 mm) and top views of two colonies of D. ehrenbergiana (height of K and L513 mm and 19.8 mm, respectively); M–N, calicular (longer diameter513.4 mm) and side view of a colony of D. coccinea (height527 mm); O–P, calicular (longer diameter58 mm) and side view of colony of D. compressa (height533.1 mm); Q–R, calicular (longer diameter59.9 mm) and four solitary corallites of D. gracilis (maximum height521.2 mm).

Figure 4. Cyathelia sp., Culicia sp. and Oulangia sp. A–B, calicular (longer diameter55.1 mm) and colony of Cyathelia axillaris (height535.85 mm); C, calicular of Culicia japonica (longer diameter55.9 mm); D, caliculars of Culicia rubeola (colony size515.3 mm×14 mm) and E, calicular of Oulangia stokesiana (longer diameter59 mm).