Reteporella gigantea ( Busk, 1884 )
publication ID |
https://doi.org/ 10.1080/00222930500124664 |
persistent identifier |
https://treatment.plazi.org/id/03938784-FFEA-4432-FE22-FC2BFD0BFDD7 |
treatment provided by |
Carolina |
scientific name |
Reteporella gigantea ( Busk, 1884 ) |
status |
|
Reteporella gigantea ( Busk, 1884) View in CoL
( Figure 13 View Figure 13 A–G) Retepora gigantea Busk 1884, p 114 , Plate 26, Figure 7 View Figure 7 .
Material
St. 37 Marion Island (46 ° 41 9 S, 38 ° 01 9 E), 360–376 m, SAM A27526 View Materials GoogleMaps ; St. 45 Marion Island (47 ° 00 9 S, 37 ° 55 9 E), 420–540 m, SAM A27493 View Materials GoogleMaps .
Description
Colony forms large, erect, reticulate lacy fans, to 30 mm high, with horizontal spread of at least 30 mm. Branches (trabeculae) 0.8–1.2 mm in diameter, fusing at regular intervals, leaving diamond-shaped to oval spaces (fenestrulae) between them, usually 3–4.5 mm long and 0.9–1.7 mm wide. Autozooids in two to three alternating, longitudinal series (four prior to trabecular division), opening on one surface, elongate, separated by clear, raised sutures, 0.5–0.9X 0.35–0.5 mm. Primary orifice circular, obscured in early ontogeny by a low, thick-rimmed peristome, enclosing a small medio-proximal avicularium with a finely denticulate, semicircular rostrum, adjacent to a small, round pseudospiramen. No oral spines apparent. Frontal shield granular, with a few (less than six) large pores scattered on the surface. One or two small, frontal adventitious avicularia present on each autozooid, with semicircular rostrum. Irregularly shaped kenozooids sporadically present between the autozooids, particularly adjacent to trabecular fusion/anastomosis; each bearing one or two adventitious avicularia. Ovicell hyperstomial, partly obscured by a granular ooecial cover; with a narrow, straight frontal fissure.
Remarks
Reteporella gigantea View in CoL was described by Busk (1884) from Possession Island (46 ° 47 9 S, 51 ° 37 9 E) and has not been reported again since. It is particularly characterized by its large, broadly open, fan-like colony form, by the small pseudospiramen set close to the proximal rim of the peristome, and by its small adventitious avicularia, occurring singly within the peristome, and elsewhere on the frontal shield. Busk (1884) noted a second type of avicularium, with a slender, acuminate mandible, sparsely present in his material, but none were noted in the Marion Island specimens.
SAM |
South African Museum |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
Family |
|
Genus |