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A simplified placenta‐like system for the transport of extraembryonic nutrients during embryogenesis of Bugula neritina (bryozoa)
Embryos of the marine cheilo‐ctenostome bryozoan Bugula neritina undergo a marked increase in volume during embryogenesis while being retained in a brood chamber suggesting that the parent is involved as a source of extraembryonic nutrients required for the extensive growth of the embryo. Expand
Attachment and metamorphosis of the cheilo‐ctenostome bryozoan bugula neritina (linné)
The structure, attachment and subsequent metamorphosis of larvae of the marine bryozoan Bugula neritina were studied by light and electron microscopy.
Comparison of the neuromuscular systems among actinotroch larvae: systematic and evolutionary implications
Comparison of the larval and presumptive juvenile neuromuscular systems among actinotroch larvae was performed using confocal laser microscopy with probes for F‐actin and serotonin to yield insights into the evolution of lophotrochozoan body plans. Expand
Origin and structure of the brood chamber in Bugula neritina (Bryozoa)
Confirmation that the epithelium of the vesicle adjacent to the embryo is hypertrophied, and the additional observation that funicular tissue is associated with these epithelial cells support the hypothesis that the maternal autozooid functions in extra-embryonic nutrition of the embryo. Expand
Bryozoan Monticules: Excurrent Water Outlets?
Monticules, regularly arranged modified areas on Paleozoic Bryozoa, may represent regions from which water currents produced by lophophores of adjacent feeding zoids escaped. Such circulationExpand
Mycoplasma-Like Organisms: Occurrence with the Larvae and Adults of a Marine Bryozoan
Thousands of the symbionts are externally attached to each larva along a unique superficial groove; the microorganisms are internalized during the complex metamorphosis, thus inoculating the incipient colony. Expand
Anatomy of the larva of Amathia vidovici (Bryozoa: Ctenostomata) and phylogenetic significance of the vesiculariform larva
The apical disc of A. vidovici larvae is more complex than that of other vesiculariids and includes a new cell type, which may be glial‐like in function and a large refractile body, which is of uncertain function and is positioned near the center of the larva, is described for the first time. Expand