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Eucyclotoma albomacula

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Species of sea snail

Eucyclotoma albomacula
Eucyclotoma sp., specimen at French National Museum of Natural History (Muséum National d'Histoire Naturelle), Paris
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Raphitomidae
Genus: Eucyclotoma
Species: E. albomacula
Binomial name
Eucyclotoma albomacula
Kay, 1979

Eucyclotoma albomacula is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. It was first described by E. Alison Kay in 1979 and is distinguished by a single spiral keel on each whorl with axial white stripes; the species name (albomacula) is derived from the Latin albo (white) and macula (speck or spot).

Description

The shell varies greatly in length, with specimens ranging in size from 2 mm to 8 mm (0.08 - 0.31 inches). The holotype has a diameter of 2 mm (0.08 inches) and a length of about 7.75 mm (0.3 inches). The shell is tall-spired, thin, with a sloping spiral keel on each whorl. The shell is described as glossy, chestnut brown with three axial streaks of white colour. Its spire consists of a protoconch of two and a half whorls, a teleoconch of c. nine whorls, and an indistinct suture marked by a spiral head and a linear spiral of white and brown. It has a widely oval aperture about one-fifth the total length of the shell, a thin outer lip with protrusions of the spiral keels.

Distribution

Eucyclotoma albomacula are rare, found at mesophotic depths between 59 m to 195 m (194 - 640 ft). They are thought to be endemic to the Hawaiian Islands. The holotype was collected at a depth of 60 m (197 ft), in Kepuhi Point, O'ahu. Specimens have been collected from Lāna'i, Ni'ihau, French Frigate Shoals, Laysan, Salmon Bank, Pearl and Hermes Atoll, Midway Atoll, and Kure Atoll.

Specimens at Bernice P. Bishop Museum Shell length (mm) Site collected Depth range
1 (holotype specimen) 7.75 Kepuhi Point, O’ahi 60 m
3 specimens 3.9 - 6.0 Lāna‘i 75 m - 91 m
1 specimen 4.6 Ni‘ihau 59 m
1 specimen 7.0 French Frigate Shoals 85 m
1 specimen 2.5 Laysan 64 m
2 specimens, 1 partial shell 2.7 - 3.5 Salmon Bank 82 m (partial shell found at 91 m)
12 specimens, 1 partial shell 2.2 - 3.0 Pearl and Hermes Atoll 55 m - 98 m (partial shell found at 85 m)
7 specimens, 1 partial shell 2.2 - 5.7 Midway Atoll 59 m - 65 m (partial shell found at 84 m)
4 specimens 2.0 - 6.8 Kure Atoll 88 m - 94 m

This table does not represent every specimen of Eucyclotoma albomacula collected, merely specimens in possession of the Bernice P. Bishop Museum, Honolulu, Hawaii.

See also

References

  1. ^ Eucyclotoma albomacula Kay, 1979. Retrieved through: World Register of Marine Species on 5 April 2010.
  2. ^ Kay, E. Alison, ed. (1979). Reef and shore fauna of Hawaii. 4: Mollusca / E. Alison Kay. Bishop Museum special publication. Honolulu, Hawai'i: Bishop Museum Press. p. 358. ISBN 978-0-910240-26-0.
  3. ^ Polhemus, Dan A. (12 April 2020). "New Records and Updated Distributional Data for Marine Micromollusks (Mollusca: Gastropoda) from the Mesophotic Depth Zone of the Hawaiian Islands" (PDF). Bishop Museum Occasional Papers (133): 13.
  • Severns, M. (2011). Shells of the Hawaiian Islands - The Sea Shells. Conchbooks, Hackenheim. 564 pp.
  • Liu J.Y. (ed.)(2008). Checklist of marine biota of China seas. China Science Press. 1267 pp

External links

Taxon identifiers
Eucyclotoma albomacula
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