Brookula decussata explained

Brookula decussata is a species of sea snail, a marine gastropod mollusk unassigned in the superfamily Seguenzioidea.

This species is considered sometimes a synonym of Brookula pfefferi Powell, A.W.B., 1951, but B. decussata is somewhat smaller and a has a more definite sculpture with fewer spirals and more axials.^[1]

Description

The maximum recorded size of the shell is 2.5 mm.

Distribution

This marine species occurs off the South Orkney Islands and off The Antarctic Peninsula.

References

• Powell, A. W. B. 1951. Antarctic and Subantarctic Mollusca: Pelecypoda and Gastropoda. Discovery Reports 26: 47–196, pls. 5–10
• Dell, R. K. 1990. Antarctic Mollusca, with special reference to the fauna of the Ross Sea. Royal Society of New Zealand Bulletin 27: iv + 311 pp
• Numanami, H. and T. Okutani. 1991. A new species of the genus Brookula collected by the icebreaker Shirase from Breid Bay, Antarctica (Gastropoda: Cyclostrematidae). Venus 50: 37–42.
• Numanami, H. 1996. Taxonomic study on Antarctic gastropods collected by Japanese Antarctic research expeditions. Memoirs of National Institute of Polar Research (E)39: [v] + 244 pp.
• Engl W. (2012) Shells of Antarctica. Hackenheim: Conchbooks. 402 pp.

Notes and References

1. https://www.biodiversitylibrary.org/page/5632321#page/134/mode/1up Discovery Reports, Antarctic and subantarctic mollusca; v. 26 1954, p. 104