5403679778_867634f529 5403083563_16bda80dbe_s
Photo © Scott Loarie, some rights reserved
pillar point CA (Google, OSM)
37.494730899, -122.4988705725
Accuracy: 29m
open
Jan. 31, 2011 15:33:55 +1100
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Comments & Identifications

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angular unicorn - Photo (c) Scott Loarie, some rights reserved (CC BY)
loarie's ID: angular unicorn (Acanthina spirata [inactive]) (inactive taxon)
Posted by loarie almost 4 years ago (Flag)
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angular unicorn - Photo (c) Scott Loarie, some rights reserved (CC BY)
invertboy's ID: angular unicorn (Acanthina spirata [inactive]) (inactive taxon)
Posted by invertboy over 2 years ago (Flag)
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angular unicorn - Photo (c) Femorale, some rights reserved (CC BY-NC)
loarie's ID: angular unicorn (Acanthinucella spirata) Added as part of a taxon swap
Posted by loarie 12 months ago (Flag)
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angular unicorn - Photo (c) Femorale, some rights reserved (CC BY-NC)
invertboy's ID: angular unicorn (Acanthinucella spirata) Added as part of a taxon swap
Posted by invertboy 12 months ago (Flag)
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Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
invertzoo's ID: Spotted Unicorn (Acanthinucella punctulata)
Posted by invertzoo about 1 month ago (Flag)
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It is very easy to confuse these two species. But here is what typical Acanthina spirata really looks like, much higher-spied, white aperture, very angular outline, not nearly as rounded as A. punctulata:

http://www.jaxshells.org/2005yy.htm

Posted by invertzoo about 1 month ago (Flag)
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Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
loarie's ID: Spotted Unicorn (Acanthinucella punctulata)
Posted by loarie about 1 month ago (Flag)
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thank you

Posted by loarie about 1 month ago (Flag)
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You are welcome. I have made the same error myself and a lot of people confuse the two species, but I think after a lot of studying that I now understand the differences between them. Where I used to live near San Diego, A. spirata was very common and A. punctulata was very rarely seen. In central and northern California the opposite seems to be true.

Posted by invertzoo about 1 month ago (Flag)
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Identification Summary

Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
loarie's ID: Spotted Unicorn (Acanthinucella punctulata)
Acanthinucella - Photo (c) Scott Loarie, some rights reserved (CC BY)
Community ID: Genus Acanthinucella, a member of Murex Snails (Family Muricidae)
About
Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
invertzoo's ID: Spotted Unicorn (Acanthinucella punctulata)
angular unicorn - Photo (c) Femorale, some rights reserved (CC BY-NC)
invertboy's ID: angular unicorn (Acanthinucella spirata) Added as part of a taxon swap

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Data Quality Assessment

Community-supported ID? Yes
3 people agree
0 people disagree
Date? Yes
Georeferenced? Yes
Photos or sounds? Yes
Is the organism wild/naturalized? Unknown
What do you think?
Yes / No
Does the location seem accurate? Unknown
What do you think?
Yes / No
Does the date seem accurate? Unknown
What do you think?
Yes / No
Appropriate? Yes
Quality grade research
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Observation © Scott Loarie
Cc-by_small some rights reserved

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