Cordylophora lacustris

The Reorganization of Tissue Masses of Cordylophora Lacustris and the Effect of Oral Cone Grafts, with Supplementary Observations on Obelia Gelatinosa

The Nerve Elements in Silver-stained Preparations of Cordylophora.

SYNOPSIS. The nervous sjstem in the hydranth of Cordylophora was stained by a modified Peters' silver method. Nerve elements are found onl) in the ectoderm, where the) form a dense plexus, oriented mainly longitudinally. The majoriu of the nerve cells, whether lying deep in the ectoderm or near the surface, carry a short hair, presumably sensory. These findings are compared to earlier reports o...

Intercellular Connections in the Outgrowing Stolon of Cordylophora

Outgrowth of the stolon in the hydroid Cordylophora has been studied at the cellular level. Staining experiments and histological examination indicate that the generative region of the stolon is at its base where interstitial cells are prominent. Cells in the ectoderm at the stolon tip appear to be actively synthesizing new perisarc as the tip advances over the substrate, rather than involved i...

Microsatellite loci for the invasive colonial hydrozoan Cordylophora caspia.

Cordylophora caspia, a colonial hydrozoan native to the Ponto-Caspian region, has become a common invader of both fresh and brackish water ecosystems of North America and Europe. We describe 11 polymorphic microsatellite loci for this species. Preliminary analyses indicate that population substructure may contribute to departures from Hardy-Weinberg equilibrium. In addition, new loci failed to ...

Proline Control of the Feeding Reaction of Cordylophora

The colonial hydroid Cordylophora is a carnivore whose feeding is induced by substances released from captured prey. An active molecule, probably the only one, has been isolated from a fraction of the laboratory food of Cordylophora, brine shrimp larvae, and identified on paper chromatograms as the imino acid proline. Reagent proline induces the feeding reaction at 10(-5)M. The reaction is spec...