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Chemical alarm and defence in the oribatid mite Collohmannia gigantea (Acari: Oribatida)
- G. Raspotnig
- BiologyExperimental & applied acarology
- 3 August 2006
The multicomponent oil gland secretion of Collohmannia gigantea, a middle-derivative mixonomatan oribatid mite, is demonstrated to possess alarm pheromonal and allomonal properties, furnishing evidence for a phylogenetically early origin of defensive and communicative roles of oil gland secretions in o ribatids.
Integrative taxonomy: Combining morphological, molecular and chemical data for species delineation in the parthenogenetic Trhypochthonius tectorum complex (Acari, Oribatida, Trhypochthoniidae)
The approach combined morphological, molecular and chemical data to investigate diversity and species delineation in a parthenogenetic oribatid mite species complex and may help to build up more stable phylogenetic hypotheses in the future.
Millipedes That Smell Like Bugs: (E)-Alkenals in the Defensive Secretion of the Julid Diplopod Allajulus Dicentrus
The occurrence of additional, non-quinonic compounds in certain species within a chemically homogenous, benzoquinone-producing taxon indicates the rapid adoption of novel exocrine compounds, possibly in order to meet the demands in a changed ecological environment.
Oil gland secretions in Oribatida (Acari)
- G. Raspotnig
Pheromonal properties of oil gland compounds probably evolved early in ancient oil gland-bearing oribatids from purely defensive functions, culminating in a radiation of semiochemical roles (alarm, aggregation, sex) in oil glands of the Astigmata.
Chemosystematics in the Opiliones (Arachnida): a comment on the evolutionary history of alkylphenols and benzoquinones in the scent gland secretions of Laniatores
- G. Raspotnig, Michaela Bodner, S. Schäffer, S. Koblmüller, Axel L. Schönhofer, I. Karaman
- 15 May 2014
Large prosomal scent glands constitute a major synapomorphic character of the arachnid order Opiliones. These glands produce a variety of chemicals very specific to opilionid taxa of different…
Tasty but Protected—First Evidence of Chemical Defense in Oribatid Mites
- M. Heethoff, Lars Koerner, R. A. Norton, G. Raspotnig
- BiologyJournal of Chemical Ecology
- 6 September 2011
This work developed a protocol that discharges the oil glands of the model oribatid species, Archegozetes longisetosus, and offered ‘disarmed’ individuals as prey to polyphagous Stenus beetles (Staphylinidae), using untreated mites as controls to provide the first evidence of an adaptive value of o ribatid mite oil gland secretions for chemical defense.
On the enigmatic scent glands of dyspnoan harvestmen (Arachnida, Opiliones): first evidence for the production of volatile secretions
- G. Raspotnig, Miriam Schaider, E. Stabentheiner, H. Leis, I. Karaman
- 31 January 2014
It is shown that at least certain nemastomatid Dyspnoi, namely all three species of genus Carinostoma, indeed produce a volatile secretion, comprising octan-3-one, 6-methyl-5-hepten-2-one and acetophenone in species-specific combinations.
Evidence of Nasonov Scenting in Colony Defence of the Giant Honeybee Apis dorsata
The Nasonov scent seems to act as a superior pheromone for the control and promotion of individual defensive reaction, synchronizing and maximizing the defensive response on colony level.
Chrysomelidial in the Opisthonotal Glands of the Oribatid Mite, Oribotritia berlesei
The chrysomelidials, as well as β-springene and octadecadienal, are newly identified compounds in the opisthonotal glands of oribatid mites and have chemotaxonomic potential for this group.
Benzoquinone-rich exudates from the harvestman Pachylus paessleri (Opiliones: Gonyleptidae: Pachylinae)
While dimethyl- and trimethyl-benzoquinones are widespread in scent gland secretions of Gonyleptoidea, 2,5-dimethyl-3-ethyl-1,4- Benzoquinone and 2,ethyl-5-methyl-1-4-benzosquinone are reported for the first time in Opiliones.