Eucyclotoma albomacula is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.[1] 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).[2]
| Eucyclotoma albomacula | |
|---|---|
| |
| Eucyclotoma sp., specimen at French National Museum of Natural History (Muséum National d'Histoire Naturelle), Paris | |
Scientific 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
| |
Description
editThe shell varies greatly in length, with specimens ranging in size from 2 mm to 8 mm (0.08 - 0.31 inches).[3] 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.[2]
Distribution
editEucyclotoma 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.[3] 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.[3]
| 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
editReferences
edit- ^ a b Eucyclotoma albomacula Kay, 1979. Retrieved through: World Register of Marine Species on 5 April 2010.
- ^ a b 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.
- ^ a b c d 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. [Ruiyu] (ed.)(2008). Checklist of marine biota of China seas. China Science Press. 1267 pp
External links
edit- Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295. doi:10.11646/zootaxa.682.1.1.
- Kay, E. A. (1979). Hawaiian marine shells. Reef and shore fauna of Hawaii. Section 4: Mollusca. Bernice P. Bishop Museum Special Publications. 64xviii + 1-653
- Moretzsohn, Fabio, and E. Alison Kay. "HAWAIIAN MARINE MOLLUSCS." (1995)