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Cochlodina laminata

Cochlodina laminata
Photo Information
Copyright: Dietrich Meyer (meyerd) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 584 W: 64 N: 2237] (7529)
Genre: Animals
Medium: Color
Date Taken: 2007-04-22
Categories: Molluscs
Camera: Konika Minolta Dynax 7D, Minolta AF 100 Macro & Kenko tube
Exposure: f/22, 1/125 seconds
Details: Tripod: Yes (Fill) Flash: Yes
Photo Version: Original Version
Theme(s): Snails in the World [view contributor(s)]
Date Submitted: 2007-04-23 4:52
Viewed: 3584
Points: 10
[Note Guidelines] Photographer's Note
Lesser know backyard critters III:
This is a 17 mm big Plaited door snail (Clausiliidae; Cochlodina laminata; Glatte Schliessmundschnecke). It stays hidden under logs when dry but climbs tree trunks when humid. You find the snail all over Europe. The determination of the species is tricky, you really should dissect the snail and study the form of the calcareous lock and key at the mouth of the shell (you can see the bright yellow outlines of the lock through the shell). Lock and key are both formed by the mantle of the snail. The mantle is barely visible here, protruding slightly from the mouth.

I used a macro lens, a macro double flash with dispersers, a one-legged tripod (?), 1/125 and f 22. The picture was cropped, sharpened, contrasted and lightened in PS, some glare and dirt particles were removed with stamp.

All Clausiliid shells seem to have lefthanded turns. This asymmetry is predetermined in the egg cell and the first cellular divisions are asymmetric. This implies that the handedness of a shell is really determined by the mother producing the asymmetric egg ("maternal effect"). The book "Right Hand, Left Hand: The Origins of Asymmetry in Brains, Bodies, Atoms and Cultures" by Chris McManus tells it all.

anel, cicindela, JORAPAVI has marked this note useful
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ThreadThread Starter Messages Updated
To JORAPAVI: Thanks for hanging onmeyerd 1 04-24 16:22
To anel: Howard berücksichtigtmeyerd 1 04-23 15:48
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Critiques [Translate]

  • Great 
  • anel Gold Star Critiquer/Gold Note Writer [C: 3052 W: 3 N: 8715] (40572)
  • [2007-04-23 6:51]
  • [+]

Hallo Dieter,
So klein ist diese erstaunliche Schliessmundschnecke! Und wunderschön das hohe Häuschen. Nicht ganz einfach diese zu fotografieren! Es ist Dir aber eine interessante Komposition gelungen, mit der Umkehrung des Schneckleins. Und danke auch für die Erklaerungen.
Einen schönen Tag wünscht Dir

  • Great 
  • clnaef Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 778 W: 67 N: 645] (6814)
  • [2007-04-23 14:35]

Belle position d'équilibriste.
Bonne soirée.

  • Great 
  • demeve Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 586 W: 12 N: 1682] (6165)
  • [2007-04-23 15:35]

Hello Dietrich, interesting snail and pose!, i really like the photo, congrats..

Hola Dietrich,
Una toma my bien detalla y contrastada con el fondo, Saludos
José Ramón

Hello Dietrich,
Another very interesting presentation. I really do not remember to see on TN pictures of Clausiliidae snails. Very nice - mobile composition, with very good details especially well seen on the snail's head. Note is as always very informative.
Greetings from Lodz,

PS. Thanks for your friendly replay for post about Empididae fly :)

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