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Atlanta peroni | Deep Sea plankton | Tiefsee Plankton

[Digital focus stacking] Atlanta peroni, a pteropod (or "wing-head" mollusk, must be an artist's dream. This animal swims, coiled shell and all, using the long wings near its head as oars. Development of a unique eye: photoreceptors of the pelagic predator Atlanta peroni (Gastropoda, Heteropoda)
The eyes of different larval stages and juveniles of Atlanta peroni are generally composed of a cornea, a lens and a retina. In juveniles a distinct pigmented shield is visible and an enormous humour is located behind the lens. Larvae have only two sensory cells and the photoreceptors are of the ciliary type. In juveniles a striking feature is the shape of the retina. It is ribbon-shaped and new sensory cells are present which are arranged in three rows. The photoreceptors are of the ciliary type as well. Contrary to the arrangement in larvae, the ciliary plasmalemma in juveniles forms numerous lamellar stacks. In accordance with the sensory cells the stacks are organized in three parallel rows. The lamellae of adjacent stacks within a row overlap each other. The latter unique feature has not yet been found in any other representative of the Heteropoda. These findings demonstrate that (a) the eyes are altered during the development from larvae into juveniles, (b) the larval sensory cells are reduced and replaced by new sensory cells in juveniles and (c) the eyes of juvenile and adult A. peroni are well adapted for their life as visual predators. | Atlanta peroni | Deep Sea plankton [size of single organism: 1 mm] | Tiefsee Plankton | [M] Z-image - Die Kleinen ernähren sich von den noch kleineren. Die nur 5 Millimeter lange Atlanta peroni gehört zu den kleinsten Gehäuseschnecken und lebt freischwebend in tropischen Meeren. Die Körperanhänge dienen dabei nicht nur dem Schwimmen, sondern mit einem Saugnapf daran fängt sie auch tierische Plankton-Organismen ein, die noch kleiner sind als sie.

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Filename
07-11-18 145224 Atlanta peroni Deep Sea plankton Tiefsee Plankton_.jpg
Copyright
AWI / Solvin Zankl
Image Size
5100x3387 / 4.9MB
Contained in galleries
[Digital focus stacking] Atlanta peroni, a pteropod (or "wing-head" mollusk, must be an artist's dream. This animal swims, coiled shell and all, using the long wings near its head as oars. Development of a unique eye: photoreceptors of the pelagic predator Atlanta peroni (Gastropoda, Heteropoda) <br />
The eyes of different larval stages and juveniles of Atlanta peroni are generally composed of a cornea, a lens and a retina. In juveniles a distinct pigmented shield is visible and an enormous humour is located behind the lens. Larvae have only two sensory cells and the photoreceptors are of the ciliary type. In juveniles a striking feature is the shape of the retina. It is ribbon-shaped and new sensory cells are present which are arranged in three rows. The photoreceptors are of the ciliary type as well. Contrary to the arrangement in larvae, the ciliary plasmalemma in juveniles forms numerous lamellar stacks. In accordance with the sensory cells the stacks are organized in three parallel rows. The lamellae of adjacent stacks within a row overlap each other. The latter unique feature has not yet been found in any other representative of the Heteropoda. These findings demonstrate that (a) the eyes are altered during the development from larvae into juveniles, (b) the larval sensory cells are reduced and replaced by new sensory cells in juveniles and (c) the eyes of juvenile and adult A. peroni are well adapted for their life as visual predators. | Atlanta peroni | Deep Sea plankton [size of single organism: 1 mm] | Tiefsee Plankton | [M] Z-image - Die Kleinen ernähren sich von den noch kleineren. Die nur 5 Millimeter lange Atlanta peroni gehört zu den kleinsten Gehäuseschnecken und lebt freischwebend in tropischen Meeren. Die Körperanhänge dienen dabei nicht nur dem Schwimmen, sondern mit einem Saugnapf daran fängt sie auch tierische Plankton-Organismen ein, die noch kleiner sind als sie.