A new vagrant species of phyllocoptine mites, Leipothrix nagyi n. sp . collected from Zinnia elegans (Asteraceae) is described and illustrated Hungary. Further three eriophyoid were recorded for the first time in Hungary, viz. Aceria hippophaena (Nalepa, 1898) found on Hippophaë rhamnoides, Epitrimerus cupressi (Keifer, 1939) Cupressus sempervirens tanaceti Boczek et Davis, 1984 associated with...

Background & Aim: The genus Tanacetum L. belongs to the family Asteraceae and tribe Anthemideae. According to the recent findings the number of Tanacetum species in Iran is 36, of which 12 are endemic. In this study the essential oil composition of Tanacetum chiliophyllum var. oligocephalum was investigated for the first time.   Experimental: The plant was c...

Photosymbiotic ascidian fauna were surveyed in the subtidal zone off Pari Island in the Thousand Islands (Java Sea, Indonesia). Nine species were recorded: Didemnum molle, Trididemnum miniatum, Lissoclinum patella, L. punctatum, L. timorense, Diplosoma gumavirens, D. simile, D. simileguwa, and D. virens. All of these species have been previously recorded in the Ryukyu Archipelago, Japan. Diplos...

Sharks use highly sensitive electroreceptors to detect the electric fields emitted by potential prey. However, it is not known whether prey animals are able to modulate their own bioelectrical signals to reduce predation risk. Here, we show that some shark (Chiloscyllium punctatum) embryos can detect predator-mimicking electric fields and respond by ceasing their respiratory gill movements. Des...

Abramowitz, A. A., "Regeneration of Chromatophore Nerves," Proc. Nat. Acad. Sci., 21, 137-141 (1935). Mills, S. M., "The Double Innervation of Fish Melanophores," Jour. Exp. Zool., 64, 231-244 (1932). Smith, D. C., "The Action of Certain Autonomic Drugs upon the Pigmentary Responses of Fundulus," Ibid., 58, 423-453 (1931). Wyman, L. C., "Blood and Nerve as Controlling Agents in the Movements of...

from the aerial parts of tanacetum balsamita l. (compositae) a flavonol aglycon was iso­lated using chromatographic techniques. the structure of this compound was determined using spectroscopic methods (uv, h-nmr and ms) as 3',4',5,7-tetrahydroxy flavonol (quercetin).