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Geographic Distribution

Antarctic Convergence illustration Antarctic convergence

Bathymetric Specimen Dispersal

25 individual specimens found for Balanophyllia chnous.

Balanophyllia chnous Squires  Species


Original Description
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Original Description
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“37. Balanophyllia chnous Squires, 1962

Plate 16, figs. 1-3

Thecopsammia sp. Gardiner, 1929a, pp. 126, 127.

Balanophyllia sp. Gardiner, 1929a, pp. 126, 127.

Balanophyllia chnous Squires, 1962b, pp. 13, 21, 22, pL. 1, fig. 17, pl. 2, figs. 1-3; 1969, pp. 17, 18, pl. 6, map 2.

Description. In the following the holotype is redescribed. Corallum ceratoid, becoming cylindrical toward calice, firmly attached to substrate by pedicel 6.2 mm in diameter. Calice elliptical, 12.1 x 9.3 mm in diameter; corallum 30.4 mm tall. Epitheca covering porous synapticulotheca to within 3 mm of calice. Epitheca heavily encrusted with Bryozoa, Foraminifera, serpulids, and sponges. Costae not apparent but may have been present before epitheca formed. Sixty-six septa hexamerally arranged in five incomplete cycles. S1 largest septa, slightly exsert, and extending to columella. S2 slightly smaller, not reaching columella. Remaining septa arranged in Pourtalès plan, those adjacent to S1 and S2 large and usually extending to columella. Development of S5 irregular within systems: the two lateral systems without S5, but the four systems adjacent to lateral edges with variable number of S5. Three half systems with all four S5. Inner edges of S1, 2 straight and entire; those of S3-5 irregular to laciniate. Septal granules prominent, as large as septal thickness in height. Short, low carinae present on inner edges of larger septa. Columella elongate and spongy.

Discussion. B. chnous is the only dendrophylliid known from off continental Antarctica. The only specimens known were reported by Gardiner [1929a]as Thecopsammia sp. and Balanophyllia sp. He stated that the specimens were collected at Terra Nova station 91 (off New Zealand) at the beginning of his species account and at Terra Nova station 191 (Bay of Whales, Ross Sea) at the end of the species account. The original label reads 191. However, Gardiner also validly reported specimens of other species from Terra Nova station 91 in the same paper. If there was a labeling error, it might explain the subsequent lack of records of this species in the Ross Sea, even though several Eltanin stations have been made in the proximity of the type-locality.

B. chnous differs from B. malouinensis by its exsert septa; smaller size at maturity; and longer, more slender corallum.

Material. Holotype.

Types. The holotype (number 1929.10.22.25) and five paratypes (numbers 1929.10.22.22-24, 26-27) are deposited at the British Museum. They were presumably collected at Terra Nova station 191. Type-locality: Bay of Whales, Ross Sea; 355-457 m.

Distribution. Known only from type-locality (Map 13).”

(Cairns, 1982)


Type Status Catalog No. Date Collected Location Coordinates Depth (m) Vessel
  94221   South Pacific Ocean 34.13° S , 172.78° E 315  
  94222   South Pacific Ocean 34.42° S , 172.25° E 141  
  94223   South Pacific Ocean 33.98° S , 171.67° E 250  
  94224   South Pacific Ocean 34.66° S , 172.22° E 270  
  94225 1981 South Pacific Ocean 34° S , 171.8° E 201 – 216  
  94226 1981 South Pacific Ocean 34° S , 171.8° E 206 – 221  

View additional taxa  View all species collected at same locations as Balanophyllia chnous

External Resources

  • Squires, D. F. 1962b. The fauna of the Ross Sea. 2. Scleractinian corals. N.Z. Dep. Sci. Industr. Res. Bull., 147.

  • Cairns, S. D. 1982. Antarctic and Subantarctic Scleractinia, Biology of Antarctic Seas XI. Antarctic Research Series Volume 34. Ed. Kornicker LS. American Geophysical Union.