| Electron microscope investigations of the fossil and recent polychaete jaws from the genus Glycera Savigny, 1818 GraĹĽyna Mierzejewska & Piotr Mierzejewski Prace Muzeum Ziemi v. 26, 127-130 |
Abstract: The ultrastructure of jaws in three species of the genus Glycera
(Errantia, Glyceridae) has been investigated. Two of these are the Jurassic
G. baltica and G. pilicae, another, the Glycera sp. is a Recent one. G. baltica
differs from the other species by a lack of protein fibrils. The channels in
the matrix were interpreted as traces of fibrils left after the breakdown of
collagen. The fibrils have been interpreted as the material filling the channels
left after the breakdown of collagen. The fibrils in Glycera have been
compared with the fibrils and channels in the jaws of Halla parthenopeia
(Eunicidae) and Nephtys sp. (Nephtyidae). Structures observed in the
myocele of G. baltica may be the vestiges of collagen cuticle underlying the
jaws.
(Errantia, Glyceridae) has been investigated. Two of these are the Jurassic
G. baltica and G. pilicae, another, the Glycera sp. is a Recent one. G. baltica
differs from the other species by a lack of protein fibrils. The channels in
the matrix were interpreted as traces of fibrils left after the breakdown of
collagen. The fibrils have been interpreted as the material filling the channels
left after the breakdown of collagen. The fibrils in Glycera have been
compared with the fibrils and channels in the jaws of Halla parthenopeia
(Eunicidae) and Nephtys sp. (Nephtyidae). Structures observed in the
myocele of G. baltica may be the vestiges of collagen cuticle underlying the
jaws.
| Glycera pilicae Szaniawski Jurassic |
| Glycera sp., Recent |
| Glycera baltica (Eisenack) Jurassic |
