Sibogagorgia tautahi, JUAN ARMANDO SÁNCHEZ, 2005

JUAN ARMANDO SÁNCHEZ, 2005, Systematics of the bubblegum corals (Cnidaria: Octocorallia: Paragorgiidae) with description of new species from New Zealand and the Eastern Pacific, Zootaxa 1014, pp. 1-72: 62

publication ID

http://doi.org/ 10.5281/zenodo.169657

publication LSID

lsid:zoobank.org:pub:AC779A99-6987-4CF9-A8A6-4EB0FC89779C

DOI

http://doi.org/10.5281/zenodo.5668502

persistent identifier

http://treatment.plazi.org/id/755D87A2-A11F-FFDF-FEB9-9AA59635FC40

treatment provided by

Plazi

scientific name

Sibogagorgia tautahi
status

sp. nov.

Sibogagorgia tautahi   sp. nov.

( Fig. 43 View FIGURE 43 )

Material examined. Holotype: NIWA 3327, H­ 847, J 107, Z11229 View Materials , 30° 1.891 ’S – 178 ° 48.061 ’W, “Giggenbach seamount”, 872–1086 m, 23 April 2002, (RV Tangaroa   0205/ 73, epibenthic sled).

Diagnostic characters. Sclerites from the medulla thick, blunt, short, mostly smooth, straight spindles that are ornate only at the tips, reaching usually less than 0.25 mm in length ( Fig. 43 View FIGURE 43 F).

Description. Holotype is a small (defectively preserved) colony (<40 mm long), 5 mm diameter with 18 mm of base ( Fig. 43 View FIGURE 43 G). Cortex pale brown. All sclerites colourless. Surface cortex with radiate sclerites (mostly 8 ­radiates) with star­like sub­radial ornamentation ( Fig. 43 View FIGURE 43 A–D). Surface sclerites up to 0.09 mm long averaging 0.08 (0.007 SD, n= 10). Surface radiates about 1.7 times longer than wide, averaging 0.047 mm in width (0.004 SD, n= 10). Other intermediate forms in the boundary layer include irregularly enlarged radial ornamentation ( Fig. 43 View FIGURE 43 E). Medulla with thick, blunt, short, mostly smooth, straight spindles, ornate only at tips, usually less than 0.25 mm in length ( Fig. 43 View FIGURE 43 F).

Morphological variation. As in S. weberi   , medullar spindles in S. tautahi   sp. nov. are progressively less ornate towards the inner medulla, achieving higher variation at the boundary layer (e.g., Fig. 43 View FIGURE 43 E). Some of the medullar sclerites are also quite robust and fatter than others ( Fig. 43 View FIGURE 43 F).

Distribution. Only know from the Kermadec volcanoes seamount ridge, off the Bay of Plenty, New Zealand, 872–1086 m.

Species comparisons. S. tautahi   sp. nov. has larger radiates than S. weberi   , although overall they are very similar, but those of S. tautahi   are more profusely ornate (sub­radial ornamentation). The diagnostic medullar spindles are shorter than those of S. weberi   .

Etymology: The word tautahi   means “solitary” in Maori and alludes to the sole small specimen of this species.

NIWA

National Institute of Water and Atmospheric Research