Ectal mandibular gland inPolistes dominulus (Christ) (Hymenoptera, Vespidae): Ultrastructural modifications over the secretory cycle

Fortunato, Angelo; Turillazzi, Stefano; Delfino, Giovanni

doi:10.1002/(sici)1097-4687(200004)244:1<45::aid-jmor5>3.0.co;2-f

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…In Hymenoptera, several reports have described the cell components of the exocrine glands which showed a similar organization in wasps, ants and bees (Vallet et al 1991;Fortunato et al 2000;do Amaral and Machado-Santelli 2008;Cruz Landim et al 2011). Our observations about the presence of β-tubulin-like immunoreactivity in secretory cells and in the reservoir duct are in agreement with previous reports in ants (do Amaral and Machado-Santelli 2008).…”

Section: Mandibular Glandsupporting

confidence: 92%

Comparative morphology of the head glands in species of Protepeolini and Emphorini (Hymenoptera: Apidae)

Galvani¹,

Settembrini²

2013

Apidologie

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International audienceThe tribe Protepeolini is formed by parasitic bees with Leiopodus being the only genus of the tribe. Protepeolini bees parasitize the nests of members of the tribe Emphorini. Secretions of the head glands are important to the biology of bees as they may act as chemical signals in parasitism strategies. In this paper, we describe the morphology and histoarchitecture of head glands in three Protepeolini species and compare them with those of their Emphorini hosts. Mandibular and hypopharingeal glands were identified , but no head salivary glands were observed. Only parasitic species displayed sexual dimorphism in the morphology of mandibular glands, with males showing well-developed secretory portions and a characteristic organization of the secretory tissue which was previously unknown in bees. The possible role of mandibular head glands is discussed in relationship to behavioral parameters of Leiopodus

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Section: Mandibular Glandsupporting

confidence: 92%

Comparative morphology of the head glands in species of Protepeolini and Emphorini (Hymenoptera: Apidae)

Galvani¹,

Settembrini²

2013

Apidologie

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“…In Apis mellifera for example, the secretion is known to act as a queen substance (Butler and Simpson 1958). In the stingless bee, Trigona hyalinata, it acts as a trail marking substance (Nieh et al 2003) and Polistes dominulus uses it as a nest defending substance (Fortunato et al 2000). The present study shows that secretory cells are larger in virgin queens than they are in mated queens.…”

Section: Function Of the Mandibular Glandsmentioning

confidence: 48%

Functional morphology of the mandibular gland of queens of the ant Monomorium pharaonis (L.)

et al. 2012

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In this study, the functional morphology of the mandibular glands of pharaoh ant queens is investigated through histological and behavioural observations. The mandibular glands of queens of different age stages and mating status were examined at the light microscopical as well as the ultrastructural level. The results clearly show a high activity of the gland at the time of hatching, followed by a rapid degeneration independent of the queens' mating status. We therefore hypothesize the glandular secretion serves to stimulate workers to remove the queens' pupal skin. Experiments to compare hatching ability of isolated pupae and pupae assisted by workers confirmed the necessity of worker assistance, which is even more crucial to allow proper wing formation in queens and males. Together with the histological data, this suggests that the mandibular gland may indeed play a role in the social facilitation of hatching, although bioassays are required to give decisive answers about the mandibular gland's function.

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“…5, Additional file 1: Figure S4). This view is corroborated by the fact that such ectal MGs [91–93] as found in male Philanthinae occur in all major lineages of the Aculeata (bees: e.g. [94–96], apoid wasps: [93, 97], vespid wasps: [92], ants: e.g.…”

Section: Discussionmentioning

confidence: 75%

Sexual selection and the evolution of male pheromone glands in philanthine wasps (Hymenoptera, Crabronidae)

2017

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BackgroundSexual selection is thought to promote evolutionary changes and diversification. However, the impact of sexual selection in relation to other selective forces is difficult to evaluate. Male digger wasps of the tribe Philanthini (Hymenoptera, Philanthinae) scent mark territories to attract receptive females. Consequently, the organs for production and storage of the marking secretion, the mandibular gland (MG) and the postpharyngeal gland (PPG), are subject to sexual selection. In female Philanthini, these glands are most likely solely subject to natural selection and show very little morphological diversity. According to the hypothesis that sexual selection drives interspecific diversity, we predicted that the MG and PPG show higher interspecific variation in males than in females. Using histological methods, 3D-reconstructions, and multivariate statistical analysis of morphological characters, we conducted a comparative analysis of the MG and the PPG in males of 30 species of Philanthini and three species of the Cercerini and Aphilanthopsini, two related tribes within the Philanthinae.ResultsWe found substantial interspecific diversity in gland morphology with regard to gland incidence, size, shape and the type of associated secretory cells. Overall there was a phylogenetic trend: Ensuing from the large MGs and small PPGs of male Cercerini and Aphilanthopsini, the size and complexity of the MG was reduced in male Philanthini, while their PPG became considerably enlarged, substantially more complex, and associated with an apparently novel type of secretory cells. In some clades of the Philanthini the MG was even lost and entirely replaced by the PPG. However, several species showed reversals of and exceptions from this trend. Head gland morphology was significantly more diverse among male than among female Philanthinae.ConclusionOur results show considerable variation in male head glands including the loss of an entire gland system and the evolution of a novel kind of secretory cells, confirming the prediction that interspecific diversity in head gland morphology is higher in male than in female Philanthini. We discuss possible causes for the remarkable evolutionary changes in males and we conclude that this high diversity has been caused by sexual selection.Electronic supplementary materialThe online version of this article (doi:10.1186/s12862-017-0963-6) contains supplementary material, which is available to authorized users.

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Ectal mandibular gland inPolistes dominulus (Christ) (Hymenoptera, Vespidae): Ultrastructural modifications over the secretory cycle

Cited by 6 publications

References 10 publications

Comparative morphology of the head glands in species of Protepeolini and Emphorini (Hymenoptera: Apidae)

Comparative morphology of the head glands in species of Protepeolini and Emphorini (Hymenoptera: Apidae)

Functional morphology of the mandibular gland of queens of the ant Monomorium pharaonis (L.)

Sexual selection and the evolution of male pheromone glands in philanthine wasps (Hymenoptera, Crabronidae)

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