Ovabunda hamsina (Reinicke, 1997)
|
publication ID |
https://dx.doi.org/10.3897/zookeys.373.6511 |
|
persistent identifier |
https://treatment.plazi.org/id/B9ECC5D0-4CFD-19C0-CA7E-802911DC843A |
|
treatment provided by |
|
|
scientific name |
Ovabunda hamsina (Reinicke, 1997) |
| status |
|
Ovabunda hamsina (Reinicke, 1997) Fig. 13 View Figure 13
Xenia hamsina Reinicke, 1997: 49-50; figs 20a-b, plate 30.
Ovabunda hamsina ; Janes 2008: 610-611.
Material.
Holotype: RMNH Coel. 23904, Sudanese Red Sea, Sanganeb Atoll, off Port Sudan, reef flat (19°21'33.81"N, 37°19'37.66"E), 6 April 1991, coll. G. B. Reinicke; paratypes: RMNH Coel. 23902, same data as above, April 1991; RMNH Coel. 25906, same locality SW corner, 15 m; RMNH Coel. 23553, Sudanese Red Sea, Sanganeb Atoll, lagoon slope near TQ II, 12 m, October 1992, coll. G. B. Reinicke; additional material: RMNH Coel. 23552, same locality, W-slope, TQ IV, 12 m, April 1991, coll. G. B. Reinicke; RMNH Coel. 25903, same locality, SE corner, reef flat; RMNH Coel. 25905 SW corner, 15 m; RMNH Coel. 23907, near southern jetty, 10 m; all April 1991, all coll. G. B. Reinicke; RMNH Coel. 23908, Indian Ocean, Madagascar, 1960, coll. M. Cherbounier, MNHN Oct.A.1993.16; holotype of Xenia grasshoffi SMF 2616, northern Red Sea, Gulf of Aqaba, Elat, 1 January 1968, coll. Grasshoff M.
Description.
The holotype is 25 mm high and its stalk is 18 mm long, 15 mm wide at its base and 12 mm wide at its uppermost part. Polyp’s body reaches up to 2 mm long; tentacles 5 mm long featuring three rows of 1 mm long and 0.16 mm wide pinnules, 19-21 in the outermost row. An incomplete fourth row is occasionally present. The pinnules are separated by a two-pinnule width space. The sclerites are Ovabunda -type ( Fig. 13a View Figure 13 ), 0.015-0.025 × 0.016-0.035 mm in diameter (n = 25). Occasionally, two sclerites are partially fused, reaching 0.034 mm in maximal diameter ( Fig. 13b View Figure 13 ). The tentacles of the paratypes (RMNH Coel. 25902, 23533, 25906) bear three rows of pinnules on each side, with 19-22, 19-21 and 17-22 pinnules in the outermost row, respectively, and all feature Ovabunda -type sclerites. The original description indicated non-pulsating polyps in live colonies. The ethanol-preserved colony is light beige.
Remarks.
The colonies RMNH Coel. 25905, 23907, 23908 feature three rows of pinnules with 17-22 pinnules in the outermost row. The tentacles of RMNH Coel. 23552 have four rows of pinnules and 18-21 pinnules in the outermost row; RMNH Coel. 25903 has three rows of pinnules with an indication of a fourth row, and 19-22 pinnules in the outermost row. All colonies feature Ovabunda -type sclerites.
Janes (2008) described Ovabunda hamsina from the Seychelles and the current findings confirm the assignment of Ovabunda hamsina to the genus Ovabunda based on sclerite microstructure.
Reinicke (1997) noted under the description of Xenia hamsina sp. n. (p. 49): " Xenia aff grasshoffi Reinicke, 1995: 59, Fig. 33". The type of Xenia grasshoffi was examined by us (see Table 1 View Table 1 ), and found to have the type of sclerites found in Xenia and clearly different from Ovabunda hamsina .
Similar species. Ovabunda hamsina is most similar to Ovabunda ainex . Although they both have overlapping number of pinnules in the outermost row, 17-22 and 15-20, respectively, Ovabunda ainex has three rows of pinnules and Ovabunda hamsina presents three and sometimes four rows of pinnules. They both have non-pulsating polyps in live colonies.
Distribution. Sudanese Red Sea, Madagascar, Seychelles (see Janes 2008).
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.
