dcsimg

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Stephanophyllia neglecta Boschma, 1923

Fungia patella.—Van der Horst, 1921:57 [in part: Siboga 260].

Stephanophyllia neglecta Boschma, 1923:144–145, pl. 10: figs. 28–30.—Yabe and Eguchi, 1932c:58.—Squires, 1967:505, 506 (90–140 m).—Van Soest, 1979:109.

DESCRIPTION.—Corallum moderately robust, up to 11.2 mm in calicular diameter (ALB–5213), with GCD:H ratios of 2.8–3.2. Base usually flat but may range from slightly concave to convex (see “Discussion”); peripheral edges not upturned. Costae equal in width (about 0.17 mm wide near calicular edge) with squared-off edges. Costal ornamentation and arrangement similar to that of S. fungulus. Intercostal spaces narrow, about 0.10 mm wide near calicular edge, traversed in a regular manner by synapticulae about 0.18 mm wide, producing a series of elliptical pores about 0.14 mm in greater diameter.

Septa arranged in typical micrabaciid fashion: the first two cycles (S1–2) straight and nonbifurcate, the S3 having multiple bifurcations in a well-defined sequence identical to that of S. fungulus (Figure 3), resulting in 96 septa at a calicular diameter of ≥6.8–7.0 mm. S1, composed of 16–18 trabeculae, each trabeculum projecting as a tall spine up to 0.5 mm above the septal edge, the innermost spines the tallest and inclined toward the columella. Spines of all septa strongly flattened in a plane perpendicular to septal plane. S2 composed of 15–16 trabeculae, and similar in size and shape to the S1, the third or fourth trabecular spine (in the vicinity of the S2–3 delta) always the tallest. S3, proper, quite short, bearing only 2 tall septal spines; S3I bears about 3 septal spines. Septa and septal spines of all septal cycles are approximately the same size and shape at equivalent distances from the columella, the inner edges of S1–2 gently sloping toward the columella. Upper, inner septal faces, as well as septal spines, of all septa bear tall slender granules up to 0.21 mm tall. Synapticulae round to slightly elliptical in cross section (see “Discussion”), about 0.21 mm in diameter, and unite all adjacent septa, and are particularly apparent between: the S1 and their adjacent S3I and S3II, and the S2 and their adjacent S3III. Septa imperforate except for the lines of junction of bifurcating septa and where the lower septal faces meet the costae. Marginal shelf absent; however, costae project about 0.2 mm beyond septal edges.

Fossa moderately deep, containing a columella of variable structure. Usually the columella is composed of an elliptical field of twisted, fused trabeculae; however, in small specimens (e.g., calicular diameters less than 4 mm) it is often lamellar, and even in larger specimens it may be composed of several aligned trabeculae that fuse into a lamellar structure.
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cc-by-nc-sa-3.0
bibliographic citation
Cairns, Stephen D. 1989. "A revision of the ahermatypic Scleractinia of the Philippine Islands and adjacent Waters, Part 1: Fungiacyathidae, Micrabaciidae, Turbinoliinae, Guyniidae, and Flabellidae." Smithsonian Contributions to Zoology. 1-136. https://doi.org/10.5479/si.00810282.486

Biology

provided by World Register of Marine Species
azooxanthellate

Reference

van der Land, J. (ed). (2008). UNESCO-IOC Register of Marine Organisms (URMO).

license
cc-by-4.0
copyright
WoRMS Editorial Board
contributor
Jacob van der Land [email]

Depth range

provided by World Register of Marine Species
49-555 m
license
cc-by-4.0
copyright
WoRMS Editorial Board
contributor
Stephen Cairns [email]