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  • 1
    Electronic Resource
    Electronic Resource
    The larval eye of the aeolid nudibranch Trinchesia aurantia (Alder and Hancock) (1970)
    Springer
    Cell & tissue research 109 (1970), S. 55-63 
    Details
    ISSN: 1432-0878
    Keywords: Sense organs ; Eyes ; Nudibranchs ; Trinchesia aurantia ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The larval eye of the aeolid nudibranch Trinchesia aurantia has been investigated at three different stages; in all, the eyes remain closely attached to, and in cellular contact with, the central ganglia. The larval eye is a simplified version of the adult eye in that, the eye and the constituent cells, nuclei, lens, microvilli and pigment granules are all smaller, and the interdigitation between the retinal cells is not developed. The absence of the small cells of the cornea and of the spherical vesicles in the cytoplasm of the sensory cells, is further evidence of the incomplete formation of the eye. The possible origin of the eye of Trinchesia is discussed and compared with that of other gastropods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364931
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  • 2
    Electronic Resource
    Electronic Resource
    A light and electron microscope study of some opisthobranch eyes (1970)
    Springer
    Cell & tissue research 106 (1970), S. 79-98 
    Details
    ISSN: 1432-0878
    Keywords: Sense organs ; Eyes ; Opisthobranchs ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The retina of nudibranch eyes contains two types of large cells; pigment cells which comprise about two-thirds of the total, with unpigmented sensory cells making up the remainder. Both pigment and receptor cells carry microvilli on their distal borders, but no traces of cilia were observed among them. The cornea of the eyes of aeolid and dendronotid nudibranchs is composed of a single layer of small cells, unlike the dorids where the cornea is made up of one of more large cells. The latter contain nuclei comparable in size with those of the pigment cells in the retina, but are themselves unpigmented. The elliptical eyes ofAplysia contain three types of retinal cell; the pigment cells and two kinds of receptor cells. The “ciliary” receptor cells bear equal numbers of cilia (9+2) and microvilli, while the “microvillous” receptor cells carry long tufts of microvilli with only an occasional cilium among them. The proximal cytoplasm of the receptor cells inAplysia and the nudibranchs contains large quantities of the small spherical vesicles (averaging 660 Å in diameter) which appear to be characteristic of gastropod eyes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01027719
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    Paper (German National Licenses)
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