Dilly p n (7 risultati)

There has previously been some dispute over the source of the light of Heteroteuthis. Light and electron microscopy have shown that there are no bacteria in the cavity of the luminous gland, but rather a population of spherical vesicles of varying size and content, surrounded by dense interstitial material. The contents are secr…

The general morphology and ultrastructure of the epidermal and arm tip photophores of H. macrohista have been compared. Both types of photophore have similar structures and the photocytes of each are characterized by dense aggregations of endoplasmic reticulum. The filter region of the epidermal photophores contains protoporphyr…

Examples of the ocular, digestive gland and brachial end-organ photophores of specimens from all 13 cranchiid genera are described. The cranchiine and taoniine subgroups have different ocular photophore morphologies, but very similar brachial end-organs in adult females. Most taoniines have ocular photophores that contain large…

Pyroteuthis margaritifera has morphologically distinctive photophores on the tentacles, eyeball and in the mantle cavity. The photogenic tissue in each photophore is identical, has a blue-green fluorescence and luminesces on treatment with dilute hydrogen peroxide. The photocytes frequently contain organized fibrillar material a…

The ocular photophore of Bathothauma emits light. The presumed photogenic tissue is cellular and contains a mass of highly organized crystalloids. One of its surface abuts against a fibrous system that probably acts as a light guide. The rest of the organ is surrounded by a pigment screen of modified iridophores. 20 pp., 2 figs,…

Females and juveniles of Selenoteuthis scintillans have photophores of several structural types, distributed on the tentacles and eyeballs, and within the mantle cavity and tail. Three distinct photophore types can be recognized on the basis of their accessory structures, though their photocytes are identical. The tail and some…