| 词条 | Olivella biplicata |
| 释义 |
| image = Olivella biplicata 1.jpg | image_caption = | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Caenogastropoda clade Hypsogastropoda clade Neogastropoda | superfamilia = Olivoidea | familia = Olivellidae | genus = Olivella | species = O. biplicata | binomial = Olivella biplicata | binomial_authority = Sowerby, 1825 | synonyms = }} Olivella biplicata, common names the "purple dwarf olive" "purple olive shell" or "purple olivella" is a species of small predatory sea snail, a marine gastropod mollusc in the family Olivellidae, the dwarf olives. DistributionOlivella biplicata snails are found in the Eastern Pacific Ocean coasts from British Columbia, Canada to Baja California, Mexico.[1]HabitatThis species is common on sandy substrates intertidally and subtidally, in bays and the outer coast.[1] Life habitsThese snails are carnivorous or omnivorous sand-burrowers. Shell descriptionThis shell of this species is quite solid, and large for an Olivella, with adult shells ranging from 20 mm to 27 mm in length, about one inch. The shell is smooth, shiny, and is an elongated oval in shape. The shell is often some shade of greyish purple, but it can also be whitish, tan, or dark brown. On the darker color forms there is often some rich yellow above the suture on the spire. At the anterior end of the long narrow aperture there is a siphonal notch, from which the siphon of the living animal protrudes. Human useNative people of central and southern California used the shell of this species to make decorative beads for at least the last 9,000 years.[2] Such beads have been discovered in archaeological contexts as far inland as Idaho and Arizona.[3] Within the past 1,000 years these beads began to be manufactured in large quantities on southern California's Santa Barbara Channel Islands, indicating that they were used for shell money.[4] The historic Chumash people called them anchum.[5] Notes1. ^1 Dave Cowles. 2005. Olivella biplicata (Sowerby, 1825). accessed 22 November 2008. 2. ^Bennyhoff and Hughes 1987 3. ^Fitzgerald et al. 2005 4. ^Arnold and Graesch 2001 5. ^Daily Life in a Chumash village. last change 4 August 2005, accessed 22 November 2008. References
External links{{commons category|Olivella biplicata}}
3 : Olivellidae|Native American culture|Gastropods described in 1825 |
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