The Scent Glands and Their Chemicals in the Aposematic Cotton Harlequin Bug, Tectocoris-Diophthalmus (Heteroptera, Scutelleridae)

1987 ◽  
Vol 35 (3) ◽  
pp. 227 ◽  
Author(s):  
BW Staddon ◽  
MJ Thorne ◽  
DW Knight
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Investigation ◽  
Gas Chromatography Mass Spectrometry ◽  
Scent Glands ◽  
Scent Gland ◽  
Metathoracic Scent Gland ◽  
Developmental Fate ◽  
Dorsal Gland ◽  
Gland System

In describing differences in morphology, developmental fate and secretion composition in the scent glands of the cotton harlequin bug Tectocoris diophthalmus we have sought to extend comparative knowledge of the scent gland system in the pentatomoid families within the Hemiptera-Heteroptera. Chemical investigation of the secretions was undertaken by coupled gas chromatography-mass spectrometry (GC-MS). The following volatiles were detected: 2-hexenal, 2-hexenyl acetate and 2- octenyl acetate from the metathoracic scent gland (an adult gland); nonanal from the abdominal dorsal first gland (the divided dorsal gland) in the adults; 2-hexenal, 2-octenal, 4-oxohex-2-enal, dodecane and tridecane from the abdominal dorsal second and third glands (the undivided dorsal glands) in fifth-instar nymphs. Secretory units are sparse, opener muscles absent, and secretion scarcely, if at all, present in the second and third dorsal abdominal scent glands in the adults. T. diophthalmus is an addition to the small but growing list of pentatomoids in which biochemical divergence of the abdominal dorsal first gland from the abdominal dorsal second and third glands has been reported. The metathoracic scent gland in T. diophthalmus is comparatively small, as it is in many other aposematic species within the Hemiptera-Heteroptera.

scholarly journals Chemical investigation of the essential oil of Laggera crispata (Vahl) Hepper & Wood from India

2011 ◽  
Vol 76 (4) ◽  
pp. 523-528 ◽  
Author(s):  
Ram Verma ◽  
Rajendra Padalia ◽  
Chandan Chanotiya ◽  
Amit Chauhan ◽  
Anju Yadav
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Essential Oil ◽  
Chemical Investigation ◽  
Gas Chromatography Mass Spectrometry ◽  
Western Himalayas ◽  
Caryophyllene Oxide ◽  
Oil Composition ◽  
Aerial Parts ◽  
Total Oil

Hydrodistilled essential oil of the aerial parts of Laggera crispata (Vahl) Hepper & Wood, collected from the Kumaon region of the western Himalayas was analysed by gas chromatography and gas chromatography-Mass Spectrometry. Eighty constituents, accounting for 83.9 % of the total oil composition, were identified. The oil was mainly dominated by sesquiterpenoids (45.3 %) and benzenoid compounds (33.9 %). Among them, 2,5-dimethoxy-p-cymene (32.2 %), 10-epi-?-eudesmol (14.7 %), ?-caryophyllene (6.9 %), and caryophyllene oxide (5.4 %) were major components of the oil.

γ-butyrolactone from the black stink bug: aethus indicus westwood (hemiptera: pentatomidae)

1984 ◽  
Vol 39 (3-4) ◽  
pp. 313-314 ◽  
Author(s):  
T. O. Olagbemiro ◽  
M. N. Khan ◽  
A. Mohammed
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Carbon Chain ◽  
Gas Chromatography Mass Spectrometry ◽  
Stink Bug ◽  
Scent Gland ◽  
Volatile Constituents ◽  
Chromatography Mass Spectrometry

The volatile constituents of the black stink bug, Aethus indicus Westwood (Hemiptera: Pentatomidae) from Nigeria has been examined by combined gas chromatography- mass spectrometry. γ-Butyrolactone along with with several straight carbon-chain aliphatic materials have been identified in the scent gland complex

scholarly journals The scent gland chemistry of neogoveid cyphophthalmids (Opiliones): an unusual methyljuglone from Metasiro savannahensis

Chemoecology ◽  
2019 ◽  
Vol 29 (5-6) ◽  
pp. 189-197
Author(s):  
Günther Raspotnig ◽  
Felix Anderl ◽  
Ronald M. Clouse
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
The Other ◽  
Gas Chromatography Mass Spectrometry ◽  
Methyl Ketones ◽  
Scent Gland ◽  
Exocrine Secretions ◽  
Chromatography Mass Spectrometry ◽  
The Family ◽  
Antifungal Potential

Abstract While the chemistries of scent gland secretions from a few selected species of three families of Cyphophthalmi, namely Sironidae, Pettalidae, and Stylocellidae, have already been reported and found to consist of complex blends of naphthoquinones and methyl ketones, nothing is known about the other families. We here report on the secretions of Metasiro savannahensis Clouse and Wheeler (Zootaxa 3814:177–201, 2014), a first representative of the family Neogoveidae. The secretions from males, females and one juvenile were extracted and analyzed by gas chromatography–mass spectrometry. Twenty-five compounds were identified, all of which belong to the chemical classes of naphthoquinones and methyl ketones, confirming a hypothesized chemical uniformity of cyphophthalmid exudates. One major naphthoquinone compound, however, was new for cyphophthalmids and for arthropod exocrine secretions in general: a methyljuglone isomer, 6-methyljuglone (= 6-MJ; iupac name: 5-hydroxy-6-methyl-1,4-naphthoquinone), amounted for about 20% of the secretion and was eventually identified by synthesis. Hydroxy-naphthoquinones and their derivatives are known to possess a variety of antibiotic effects, probably enhancing the antimicrobial/antifungal potential of the Metasiro-secretion. Currently, without further data on neogoveids, the compound represents a chemical autapomorphy of M. savannahensis, and—just as the strange chloro-naphthoquinones of Sironidae and Pettalidae—adds to the repertoire of unusual naphthoquinone compounds across the Cyphophthalmi.

Identification of Major Lipids from the Scent Gland Secretions of DumeriFs Ground Boa (Acrantophis dumerili Jan) by Gas Chromatography-Mass Spectrometry

1988 ◽  
Vol 43 (11-12) ◽  
pp. 914-917 ◽  
Author(s):  
John T. Simpson ◽  
Paul J. Weldon ◽  
Thomas R. Sharp
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Octadecenoic Acid ◽  
Gas Chromatography Mass Spectrometry ◽  
Adult Males ◽  
Octadecanoic Acid ◽  
Hexadecanoic Acid ◽  
Scent Gland ◽  
Chromatography Mass Spectrometry

Abstract The scent gland secretions of Dumeril’s ground boa (Acrantophis dumerili), pooled from two adult males and a female, were analyzed by gas chromatography-mass spectrometry. 2-Hydroxypropanoic acid, hexadecanoic acid, as-9-octadecenoic acid, octadecanoic acid, cholesterol, and 5-cholesten-3-one were indicated. These results are compared with those obtained in analyses of the scent gland secretions of other snakes.

Volatile Components in Dorsal Gland Secretions of the Chacoan Peccary, Catagonus wagneri

2008 ◽  
Vol 63 (9-10) ◽  
pp. 769-772 ◽  
Author(s):  
John S. Waterhouse ◽  
Bridget Langley ◽  
Paul J. Weldon
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Carboxylic Acids ◽  
Methyl Esters ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Male And Female ◽  
Chromatography Mass Spectrometry ◽  
Males And Females ◽  
Dorsal Gland

The dorsal gland secretions of captive-reared male and female Chacoan peccaries (Catagonus wagneri) were analyzed by gas chromatography-mass spectrometry. C8-C19 carboxylic acids, squalene, cholesterol, cholestanol, and cholest-7-en-3-ol were present in both males and females. Heptylbenzene, C14-C18 methyl esters, and an isomer of springene were observed in males. C15-C19 aldehydes were observed in females. The composition of the dorsal gland secretions of C. wagneri is compared to what has been reported for other peccaries (Tayassu spp.).

C9 Aliphatic Aldehydes: Possible Sex Pheromone from Male Tropical West African Shield Bug, Sphaerocoris annulus

1986 ◽  
Vol 41 (11-12) ◽  
pp. 1073-1076 ◽  
Author(s):  
A. J. E. Gough ◽  
D. E. Games ◽  
D. W. Knight ◽  
T. O. Olagbemiro
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Sex Pheromone ◽  
West African ◽  
Gas Chromatography Mass Spectrometry ◽  
Scent Gland ◽  
Aliphatic Aldehydes ◽  
H Nmr ◽  
Chromatography Mass Spectrometry

Abstract By gas chromatography-mass spectrometry, 1H NMR , and synthesis of authentic standards, the secretion from the abdominal dorsal scent gland of male adults of Sphaerocoris annulus has been found to contain a mixture of C9 aliphatic aldehydes: nonanal (3%), (Z)-4-nonenal (13%), (E)-4,8-nonadienal (23%) and (Z)-4,8-nonadienal (56%). A further component was tentatively iden­tified as 8-nonenal (5%).

The Defensive Secretion of Aspavia brunna (Schout) (Hetetoptera: Pentatomidae)

1982 ◽  
Vol 37 (7) ◽  
pp. 935-936
Author(s):  
M. I. Akpata ◽  
T. . Olagbemiro
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Defensive Secretion ◽  
Chemical Warfare ◽  
Chemical Investigation ◽  
Gas Chromatography Mass Spectrometry ◽  
Stink Bugs ◽  
True Bugs ◽  
Excellent Method

Abstract The pungent odours emitted by true bugs when disturbed have captured the attention of numerous students of the Heteroptera. Studies of the chemical composition of the secretion of these stink bugs have shown the presence of alkanes, alkenyl acetates, alcohols and unsaturated aldehydes [1-3]. Most of these chemicals are employed as chemical warfare against the onslaught of microbial, vertebrate and in-vertebrate attackers [4], We herein report the chemical investigation of a previously unstudied secretion of a pentatomid bug, Aspavia brunna. The combined gas chromatography -mass spectrometry provides an excellent method for the study of the secretions of insects. We have utilized this technique and our results are summarized below.

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