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Each lens can form clear images, and is composed of relatively large, highly crystallographically aligned grains to minimize light scattering. [22] An individual chiton may have thousands of such ocelli. [18] These aragonite-based eyes [23] make them capable of true vision, [24] though research continues as to the extent of their visual acuity ...
Map of the Southern African coastline showing some of the landmarks referred to in species range statements. The list of marine molluscs of South Africa is a list of saltwater species that form a part of the molluscan fauna of South Africa.
The distribution of Chiton magnificus ranges along the Pacific coast of South America from Cape Horn in Chile [3] to San Lorenzo Island in Peru. [2] Although there are old claimed records of this species from the Galápagos Islands, these are now considered incorrect.
In contrast to many other mollusc classes, aplacophorans have no shell, and are instead covered by aragonitic sclerites (calcareous spicules), which can be solid or hollow.. These spicules can be arranged perpendicular to one another within the cuticle to form a skeleton, stick up to form a palisade, or can lie flat against the cutic
The Calcaires du Bou Dahar (also known as Djebel Bou Dahar Paleoshoal, Djebel Bou Dahar, Calcaires du Bou Dahar Formation, or Bou Dahar Formation) is a geological formation or a sequence of formations of Late Sinemurian to Pliensbachian-Toarcian boundary (Early Jurassic) age in Bni Tadjite, the Central High Atlas, Morocco.
Animals out of water only have about 73% the respiration of submerged animals, and likely incur an oxygen debt while out of water that must be repaid once resubmerged. [4] When submerged, gas exchange occurs by water flowing from the anterior portion of the chiton into the mantle cavity where the ctenidia (gills) reside in the pallial grooves.
Still waters is an anapodoton (truncation) of the proverb still waters run deep. Still Waters alone may refer to: Film. Still Waters, a Krazy Kat animated film ...
Acanthopleura granulata, common name the West Indian fuzzy chiton (also known as Curbs or Sea Cradles), [1] is a medium-sized tropical species of chiton.This type of chiton's activity does not depend on spring-neap oscillations leading to lower locomotion loss. [2]