Search publications of the members of the Royal Belgian institute of natural Sciences
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Endocarp of Prunus (Rosaceae: Prunoideae) from the eraly Eocene of Wutu, Shandong Province, China
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A euenantiornithine bird from the Late Cretaceous Hateg Basin of Romania
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Reptiles of Venezuela: an updated and commented checklist
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Low genetic diversity in tepui summit vertebrates
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From Amazonia to the Atlantic forest:molecular phylogeny of Phyzelaphryninae frogs reveals unexpected diversity and a striking biogeographic pattern emphasizing conservation challenges
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Cryptic species in Iphisa elegans Gray, 1851 (Squamata: Gymnophthalmidae) revealed by hemipenial morphology and molecular data
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A phylogeny and taxonomy of the Thai-Malay Peninsula Bent-toed Geckos of the Cyrtodactylus pulchellus complex (Squamata: Gekkonidae): combined morphological and molecular analyses with descriptions of seven new species
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A new species of Parachute Gecko (Squamata: Gekkonidae: genus Ptychozoon) from Kaeng Krachan National Park, western Thailand
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The bent-toed geckos (Cyrtodactylus) of the caves and karst of Thailand
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Book Review. Lizards of Peninsular Malaysia, Singapore and their adjacent archipelago. By L.Lee Grismer
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Book review. Beolens Bo, Watkins Michael and Grayson Michael (2011). The eponym dictionary of reptiles. The Johns Hopkins University Press. Baltimore
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A new forest-dwelling gecko from Phuket Island, southern Thailand, related to Cyrtodactylus macrotuberculatus (Squamata: Gekkonidae)
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L’occupation romaine du territoire de la commune de La Bruyère (province de Namur).
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The secretion of the ventral glands in Hoplocampa sawfly larvae
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Checkliste der Pflanzenwespen Deutschlands (Hymenoptera: Symphyta)
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Chemical ecology of the European apple sawfly, Hoplocampa testudinea
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The secretion of the ventral glands in Cladius, Priophorus and Trichiocampus sawfly larvae
- The volatile secretion from ventral glands of the larvae of Cladius pectinicornis, Priophorus morio, P. pallipes and Trichiocampus grandis was found to be principally composed of long-chain acetogenins, in majority of the esters and hydrocarbons, with more than 15 carbon atoms. The scarcity of more volatile compounds may be considered as plesiomorphic for the tribe Cladiini to which the four species belong. Further chemotaxonomic significance and chemical ecological implications of the glandular secretions are discussed. Moreover, the function of the well-developed pubescence covering the body of Cladiini larvae is discussed as a part of their defensive mechanism.
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Sequestration of host plant glucosinolates in the defensive hemolymph of the sawfly Athalia rosae
- Interactions between insects and glucosinolate-containing plant species have been investigated for a long time. Although the glucosinolate-myrosinase system is believed to act as a defense mechanism against generalist herbivores and fungi, several specialist insects use these secondary metabolites for host plant finding and acceptance and can handle them physiologically. However, sequestration of glucosinolates in specialist herbivores has been less well studied. Larvae of the tumip sawfly Athalia rosae feed on several glucosinolate-containing plant species. When larvae are disturbed by antagonists, they release one or more small droplets of hemolymph from their integument. This "reflex bleeding" is used as a defense mechanism. Specific glucosinolate analysis, by conversion to desulfoglucosinolates and analysis of these by high-performance liquid chromatography coupled to diode array UV spectroscopy and mass spectrometry, revealed that larvae incorporate and concentrate the plant's characteristic glucosinolates from their hosts. Extracts of larvae that were reared on Sinapis alba contained sinalbin, even when the larvae were first starved for 22 hr and, thus, had empty guts. Hemolymph was analyzed from larvae that were reared on either S. alba, Brassica nigra, or Barbarea stricta. Leaves were analyzed from the same plants the larvae had fed on. Sinalbin (from S. alba), sinigrin (B. nigra), or glucobarbarin and glucobrassicin (B. stricta) were present in leaves in concentrations less than 1 micromol/g fresh weight, while the same glucosinolates could be detected in the larvae's hemolymph in concentrations between 10 and 31 micromol/g fresh weight, except that glucobrassicin was present only as a trace. In larval feces, only trace amounts of glucosinolates (sinalbin and sinigrin) could be detected. The glucosinolates were likewise found in freshly emerged adults, showing that the sequestered phytochemicals were transferred through the pupal stage.
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Host specificity and host recognition in a chemically-defended herbivore, the tenthredinid sawfly Rhadinoceraea nodicornis
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Host plant derived feeding deterrence towards ants in the turnip sawfly Athalia rosae
