Organization of the Interna of the Rhizocephalan Barnacle Peltogasterella gracilis

  title={Organization of the Interna of the Rhizocephalan Barnacle Peltogasterella gracilis},
  author={Andrey I. Shukalyuk and Sergei I. Baiborodin and Valeria V. Isaeva},
  journal={Russian Journal of Marine Biology},
We carried out an in vitro histological and TEM investigation of the organization of the interna of Peltogasterella gracilis(Crustacea: Rhizocephala), a parasite of the hermit crab. The colonial interna of P. gracilisincludes a reproductive system with multiple nuclei (externa rudiments) and a trophic system of absorbing lampbrush and transportation canals. The nucleus forms a cluster of embryonic stem cells. In the distal parts of the trophic system, there are cells that function in the… 
Organization of Interna in Sacculina polygenea (Crustacea: Rhizocephala)
Trophic and reproductive systems of colonial interna in Sacculina polygenea, a parasite of the coastal crab Hemigrapsus sanguineus, are found and the term individual is proposed to be used for the externa in rhizocephalan barnacles with its trophic system.
Stem cells in the reproductive strategy of colonial rhizocephalan crustaceans (Crustacea: Cirripedia: Rhizocephala)
Investigation of the colonial internae of Peltogasterella gracilis, Polyascus (Sacculina) polygenea, and Thylacoplethus isaevae showed that asexual reproduction in these species occurs through the budding of stolon-like structures, and stem cells evidently contribute the source of cells in asexual as well as sexual reproduction.
Development of primordial externae in the colonial interna of Polyascus polygenea (Crustacea: Cirripedia: Rhizocephala)
Careful and thorough investigations of rnorpho・ genesis i n prirnordial externae support the previous results and agree with the findings of other authors.
Effects of the Briarosaccus callosus Infestation on the Commercial Golden King Crab Lithodes aequispina
It is suggested that commercial selection of healthy males, and the returning of unsuitable crabs, including infested ones, back into the sea, results in an increase of the proportion of infested crabs in the population, their elimination from reproduction, and, eventually, the gradual degradation of a whole population.
Stem cells in reproductive strategy of asexually reproducing invertebrates
Stem cells of the colonial rhizocephalans, Peltogasterella gracilis, Polyascus polygenea and Thylacoplethus isaevae, the turbellarian Dugesia tigrina, the colonial hydroid Obelia longissima, and cultured embryonic stem cells of mouse are studied.
Muscular system in the interna of Polyascus polygenea and Sacculina pilosella Мышечная система интерны Polyascus polygenea и Sacculina pilosella ( Rhizocephala : Sacculinidae ) А .
It is suggested that this muscular system provides peristaltic movement of the roots and transports nutrients within the interna of Polyascus polygenea and Sacculina pilosella, a group of unique and highly specialized parasitic crustaceans.
Molecular and Sub-Cellular Gametogenic Machinery of Stem and Germline Cells Across Metazoa
In animals with asexual reproduction, the germ lineage is not segregated during embryogenesis, and the line of pluripotent stem cells is maintained continuously throughout the life of an individual or a colony, being predecessors of germ cells and a wide spectrum of somatic cells.


A study of the morphology and biology of Thompsonia littoralis (Crustacea : Cirripedia : Rhizocephala)
The presence of externae significantly prolongs the host's normal intermoult period and minimizes its growth, and the parasite has little effect on thehost's sexual characters although females are normally sterilized.
Comparative morphology and phylogeny of the family Thompsoniidae (Cirripedia, Rhizocephala, Akentrogonida), with descriptions of three new genera and seven new species
A numerical cladistic analysis of all Rhizocephala Akentrogonida using the Hennig 86 program leads to a redefinition of the Thompsoniidae HOeg and Rybakov, 1992 and a phylogeny for the redefined family is proposed.
Apoptosis: A Basic Biological Phenomenon with Wide-ranging Implications in Tissue Kinetics
Apoptosis seems to be involved in cell turnover in many healthy adult tissues and is responsible for focal elimination of cells during normal embryonic development, and participates in at least some types of therapeutically induced tumour regression.
Programmed Cell Death in Animal Development
The Fractal Geometry of Nature
Life cycle and reproduction in the Cirripedia Rhizocephala
A Study of the Morphology and Biology of Thompsonia littoralis ( Crustacea , Cirri - pedia , Rhizocephala )
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In vitro Visualization of Interna Colonial Organization in Rhizocephalan Barnacles Peltogasterella gracilis and Sacculina polygenea , Dokl
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Comparative Morphology and Phylogeny of the Family Thompsoniidae (Cirripedia, Rhizocephala, Akentrogonida), With Descriptions of Three New Genera and Seven New Species, Zool
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