| chromosome analysis and rdna fish in the stag beetle dorcus parallelipipedus l. (coleoptera: scarabaeoidea: lucanidae). | in the present work the chromosome complement (2n = 18; 8aa + xy) of the stag beetle dorcus parallelipipedus l. (scarabaeoidea: lucanidae) is analyzed using conventional giemsa staining, banding techniques and ribosomal fluorescent in situ hybridization (rdna fish). rdna fish remains the unique tool for providing a clear-cut identification of nucleolar organizer regions (nors) when conventional banding methods such as silver- and cma3-staining proved to be inadequate. the dull, homogeneous cma3 ... | 2000 | 11433969 |
| nucleolus and chromosome relationships at pachynema in four scarabaeoidea (coleoptera) species with various combinations of nor and sex chromosomes. | nucleolus organizer regions (nors) and nucleolus locations were studied after silver staining in spermatocytes at pachynema from four beetle species selected for their various combinations of sex chromosomes. their karyotypic formulae were: 18,neoxy (dorcus parallelipipedus); 25,x (passalus unicornis) and 20,xyp (cetonia aurata and protaecia (potosia) opaca). nors were located in the short arms of a unique acrocentric autosome pair in the first three and in intercalary position in a sub-metacent ... | 2007 | 17406990 |
| novel members of the adipokinetic hormone family in beetles of the superfamily scarabaeoidea. | eight beetle species of the superfamily scarabaeoidea were investigated with respect to peptides belonging to the adipokinetic hormone (akh) family in their neurohemal organs, the corpora cardiaca (cc). the following beetle families are represented: scarabaeidae, lucanidae, and geotrupidae. akh peptides were identified through a heterospecific trehalose-mobilizing bioassay and by sequence analyses, using liquid chromatography coupled to positive electrospray mass spectrometry (lc-esi-ms) and ana ... | 2016 | 27539647 |
| the presence of a mycangium in european sinodendron cylindricum (coleoptera: lucanidae) and the associated yeast symbionts. | part of the exoskeleton of some wood-inhabiting insects is modified to form a mycangium, which is a specialized organ used to convey fungal spores or yeasts to their offspring. although most stag beetles (coleoptera: lucanidae) are known to have female-specific mycangia and associated yeast symbionts, the evolutionary origin of the mycangium in this group remains unresolved. here, we report the presence of a mycangium and associated yeast symbionts in the european horned stag beetle sinodendron ... | 2016 | 27432353 |