Abstract
The hexane extract of Hydronothrus crispus Aoki (Oribatida: Trhypochthoniidae) was analyzed by GLC and GC/MS using a capillary column and the following four compounds were identified as the non-hydrocarbon fraction; 2-hydroxy-6-methylbenzaldehyde, neral, geranial and neryl formate. The hydrocarbon fraction analysed based on GLC and GC/MS of their DMDS derivatives consisted of a mixture of tridecane, pentadecane, (Z) -7-pentadecene, (Z) -7-heptadecene, (Z) -8-heptadecene and (Z, Z) -6, 9-heptadecadiene. All the compounds found in the secretions of oribatid mite were commonly distributed as components of opisthonotal gland secretions from astigmatid mites.
