Temat: development structure - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: On generation and regeneration of cladia in some Upper Silurian monograptids
O rozwoju i regeneracji gałązek w koloniach pewnych górno-sylurskich Monograptidae
O razvitii i regenereracii vetok v kolonijakh verkhne-silurijjskikh Monograptidae
Autorzy:: Urbanek, A.
Powiązania:: https://bibliotekanauki.pl/articles/23490.pdf
Data publikacji:: 1963
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: generation
regeneration
Upper Silurian
monograptid
Linograptinae
structure
development
paleontology
Źródło:: Acta Palaeontologica Polonica; 1963, 08, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: The ultrastructure, development, and systematic position of the graptolite genus Mastigograptus
Autorzy:: Bates, D E B
Urbanek, A.
Powiązania:: https://bibliotekanauki.pl/articles/21265.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: Graptolithina
internal structure
graptolite
development
remains
Pterobranchia
taxonomy
systematic position
stratigraphy
Mastigograptus
Ordovician
ultrastructure
paleontology
Opis:: Fragments of rhabdosomes isolated by chemical treatment from an erratic boulder of Baltic origin and ?Middle Ordovician age, provisionally assigned to Mastigograptus aff. tenuiramosus (Wallcott, 1881) were studied with SEM. Although exceptionally well preserved, remains lack the thin−walled free portions of thecae. Rhabdosomes are provided with a strongly developed basal disc, short stem and many branched stipes. The latter consist of heavily corticalized chains of stolothecae with alternately disposed thecal bases. Stolothecae display a morphological gradient and increase in size and change in shape distalwards. The stolon system studied with SEM on naturally and artificially broken specimens, as well as traced through open thecal bases, reveals a regular triad budding but no stolon inside the stolothecal cavity. We tentatively suggest that crassal lining, recognized earlier by TEM studies, corresponds to an unusually inflated stolonal stolon, filling the entire thecal cavity and adhering tightly to stolothecal wall. The systematic position of Mastigograptus, a matter of long debate, seems to be defined by a number of structural features which imply a distinct difference between genus in question and all known orders of sessile graptolites. The order Mastigograptida nov. and the family Mastigograptidae nov. are proposed.
Źródło:: Acta Palaeontologica Polonica; 2002, 47, 3
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "development structure" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język