Iontophoretic cobalt staining of the nematode Phocanema decipiens results in the deposition of cobalt between the contractile bases of adjacent muscle cells and in a hexagonal lattice pattern in the hypodermis. The possibility of staining sarcolemmal invaginations between muscle cells which are proprioceptive or coordinate the activity of adjacent muscle cells is suggested.

Irmgard Tegeder1,2,10, Michael Costigan1,10, Robert S Griffin1, Andrea Abele2, Inna Belfer3,4, Helmut Schmidt2, Corina Ehnert2, Jemiel Nejim4,9, Claudiu Marian2, Joachim Scholz1, Tianxia Wu4, Andrew Allchorne1, Luda Diatchenko5, Alexander M Binshtok1, David Goldman3, Jan Adolph2, Swetha Sama5, Steven J Atlas7, William A Carlezon8, Aram Parsegian8, Jörn Lötsch2, Roger B Fillingim6, William Maixn...

Chaetoceros is one of the most species rich, widespread and abundant diatom genera in marine and brackish habitats worldwide. It therefore forms an excellent model for in-depth biodiversity studies, assessing morphological and genetic differentiation among groups of strains. The global Chaetoceros lorenzianus complex presently comprises three species known to science. However, our recent studie...

The present study aimed at evaluating the composition, diversity and short-term temporal fluctuations of zooplankton communities in fish ponds. The study was carried out in two fish ponds, with 180 m(2) of water surface (6 x 30 m) each, located in the Aquiculture Centre of the Pindamonhangaba Fisheries Institute - São Paulo. The study was developed over eight weeks, from February 16 to April 6,...