5403679778 867634f529 5403083563 16bda80dbe s
Photo © Scott Loarie, some rights reserved
pillar point CA (Google, OSM)
37.494730899, -122.4988705725
Accuracy: 29m
open
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Comments & Identifications

477 thumb
angular unicorn - Photo (c) Scott Loarie, some rights reserved (CC BY)
loarie's ID: angular unicorn (Acanthina spirata [inactive]) (inactive taxon)
Posted by loarie about 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 about 3 years ago (Flag)
477 thumb
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 over 1 year ago (Flag)
933 thumb
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 over 1 year ago (Flag)
50920 thumb
Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
invertzoo's ID: Spotted Unicorn (Acanthinucella punctulata)
Posted by invertzoo 6 months 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 6 months ago (Flag)
477 thumb
Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
loarie's ID: Spotted Unicorn (Acanthinucella punctulata)
Posted by loarie 6 months ago (Flag)
477 thumb

thank you

Posted by loarie 6 months 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 6 months ago (Flag)
933 thumb
Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
invertboy's ID: Spotted Unicorn (Acanthinucella punctulata)
Posted by invertboy 4 months 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)
Spotted Unicorn - Photo (c) Jerry Kirkhart, some rights reserved (CC BY)
Community ID: Spotted Unicorn (Acanthinucella punctulata)
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Data Quality Assessment

Community-supported ID? Yes
2 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
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Appropriate? Yes
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Observation © Scott Loarie
Cc by small some rights reserved

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