The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Ernst Ebermann - One of the best experts on this subject based on the ideXlab platform.
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Ovoviviparity in scutacarid mites scutacaridae heterostigmatina
International Journal of Acarology, 2013Co-Authors: Julia Jagersbacherbaumann, Ernst EbermannAbstract:Scutacarid mites (Scutacaridae, Heterostigmatina) are oviparous and show a shortened developmental cycle, the larva being the only existing juvenile stage. Eggs inside of gravid females and freshly laid eggs generally show early stages of development and thus contain no differentiated embryo. However, findings of eggs already undergoing embryogenesis or even of larvae inside of gravid females in Thaumatopelvis reticulatus Ebermann and, as newly presented in this paper, Scutacarus eucomus Berlese, Scutacarus deserticolus Mahunka, Scutacarus longitarsus Berlese and Imparipes zicsii Mahunka suggest that Ovoviviparity or larviparity caused by egg retention can also occur. Egg retention in the family Scutacaridae may be an age-related phenomenon or an adaptation to unfavourable environments.
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Ovoviviparity in scutacarid mites (Scutacaridae, Heterostigmatina)?
International Journal of Acarology, 2013Co-Authors: Julia Jagersbacher-baumann, Ernst EbermannAbstract:Scutacarid mites (Scutacaridae, Heterostigmatina) are oviparous and show a shortened developmental cycle, the larva being the only existing juvenile stage. Eggs inside of gravid females and freshly laid eggs generally show early stages of development and thus contain no differentiated embryo. However, findings of eggs already undergoing embryogenesis or even of larvae inside of gravid females in Thaumatopelvis reticulatus Ebermann and, as newly presented in this paper, Scutacarus eucomus Berlese, Scutacarus deserticolus Mahunka, Scutacarus longitarsus Berlese and Imparipes zicsii Mahunka suggest that Ovoviviparity or larviparity caused by egg retention can also occur. Egg retention in the family Scutacaridae may be an age-related phenomenon or an adaptation to unfavourable environments.
Julia Jagersbacher-baumann - One of the best experts on this subject based on the ideXlab platform.
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Ovoviviparity in scutacarid mites (Scutacaridae, Heterostigmatina)?
International Journal of Acarology, 2013Co-Authors: Julia Jagersbacher-baumann, Ernst EbermannAbstract:Scutacarid mites (Scutacaridae, Heterostigmatina) are oviparous and show a shortened developmental cycle, the larva being the only existing juvenile stage. Eggs inside of gravid females and freshly laid eggs generally show early stages of development and thus contain no differentiated embryo. However, findings of eggs already undergoing embryogenesis or even of larvae inside of gravid females in Thaumatopelvis reticulatus Ebermann and, as newly presented in this paper, Scutacarus eucomus Berlese, Scutacarus deserticolus Mahunka, Scutacarus longitarsus Berlese and Imparipes zicsii Mahunka suggest that Ovoviviparity or larviparity caused by egg retention can also occur. Egg retention in the family Scutacaridae may be an age-related phenomenon or an adaptation to unfavourable environments.
Julia Jagersbacherbaumann - One of the best experts on this subject based on the ideXlab platform.
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Ovoviviparity in scutacarid mites scutacaridae heterostigmatina
International Journal of Acarology, 2013Co-Authors: Julia Jagersbacherbaumann, Ernst EbermannAbstract:Scutacarid mites (Scutacaridae, Heterostigmatina) are oviparous and show a shortened developmental cycle, the larva being the only existing juvenile stage. Eggs inside of gravid females and freshly laid eggs generally show early stages of development and thus contain no differentiated embryo. However, findings of eggs already undergoing embryogenesis or even of larvae inside of gravid females in Thaumatopelvis reticulatus Ebermann and, as newly presented in this paper, Scutacarus eucomus Berlese, Scutacarus deserticolus Mahunka, Scutacarus longitarsus Berlese and Imparipes zicsii Mahunka suggest that Ovoviviparity or larviparity caused by egg retention can also occur. Egg retention in the family Scutacaridae may be an age-related phenomenon or an adaptation to unfavourable environments.
Yoshitaka Kamimura - One of the best experts on this subject based on the ideXlab platform.
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Ovoviviparity in the tropical earwig species spongovostox semiflavus dermaptera spongiphoridae with potential convergent elongation of male genitalia
Annals of The Entomological Society of America, 2016Co-Authors: Yoshitaka KamimuraAbstract:Ovoviviparity and viviparity have evolved independently multiple times in animals. Although females exhibit extensive parental care of their eggs, (ovo)viviparity has only been reported in a few species of free-living, nonepizoic earwigs. In contrast, to date, all the studied members of families Arixeniidae and Hemimeridae, which live on mammals, are viviparous. We herein report Ovoviviparity in the tropical earwig species, Spongovostox semiflavus (Bormans, 1894) (Forficuloidea: Spongiphoridae: Spongiphorinae). We observed that females of this species retain well-developed embryos within the ovaries and then lay them with complete egg envelopes just before hatching. An average of 9.4 embryos concurrently developed in a female’s body. A similar condition has been reported for only one other species Marava arachidis (Yarsin, 1860), in the subfamily Spongiphorinae. Without additional mating, Spo. semiflavus females produced at least three clutches, consisting of an average of nine offspring within a period of 14–27 d. Both Spo. semiflavus and M. arachidis males are characterized by elongated male genitalia that are more than twice as long as their body lengths. Interestingly, elongated male genitalia are also present in the two other spongiphorids for which (ovo)viviparity has been reported. We discuss the causes of the potential convergence of the evolution of the male genital structure and the development of (ovo)viviparity in females.
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Ovoviviparity and genital evolution a lesson from an earwig species with coercive traumatic mating and accidental breakage of elongated intromittent organs
Biological Journal of The Linnean Society, 2016Co-Authors: Yoshitaka KamimuraAbstract:Ovoviviparity or viviparity has evolved independently in animals and involves adaptations in females to accommodate developing embryos for a prolonged duration in their bodies, a condition which has likely to have influenced the evolution of the male genitalia. We aimed to ascertain whether the elongated male genitalia of the ovoviviparous free-living earwig species Marava arachidis (Dermaptera: Spongiphoridae) delivers sperm directly to the female ovaries where fertilization occurs. Males mated coercively with females by grabbing the female antenna with their mouth parts. Although females resisted the mating attempts, pairs mated 3.3 times on average over 15 h. The elongated intromittent organ, known as a virga, was inserted into the long-tubed spermatheca during insemination. Surgical ectomy of the spermatheca confirmed that sperm migrated from here to the ovaries with a variable delay. A pair of sclerites in the male genitalia frequently inflicted wounds near the spermathecal opening, while the single, thin virga sometimes broke off during mating. However, unlike earwigs bearing a ‘spare’ virga, damage was restricted to the tip of the virga, without which the males could still inseminate the females. We discuss the evolution of the genitalia in this insect in the light of sexual selection and sexual conflict over mating and fertilization.
Lech Borowiec - One of the best experts on this subject based on the ideXlab platform.
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Revision of the Gonioctena flavoplagiata species-group (Coleoptera: Chrysomelidae: Chrysomelinae), with descriptions of two new species from China and Laos
Acta Entomologica Musei Nationalis Pragae, 2016Co-Authors: Lech BorowiecAbstract:The Gonioctena flavoplagiata species-group of the subgenus Asiphytodecta Chen, 1935 is defined and reviewed. Two new species are described and illustrated: G. (A.) jindrai sp. nov. (southwestern China) and G. (A.) truncaticornis sp. nov. (northeastern Laos). Gonioctena (A.) eburoides (Achard, 1924) stat. restit. is resurrected from synonymy with G. (A.) flavoplagiata (Jacoby, 1890). Lectotype is designated for G. (A.) flavoplagiata. A key to the species, diagnostic characters and illustrations are provided. Ovoviviparity is newly recorded in G. (A.) flavoplagiata and G. (A.) jindrai sp. nov.
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Two new species of the genus Gonioctena Chevrolat (Coleoptera, Chrysomelidae, Chrysomelinae) from Sichuan, China
Zootaxa, 2014Co-Authors: Lech BorowiecAbstract:Two new species of Gonioctena Chevrolat, G. sichuana sp. n. and G. metallica sp. n., are described from Sichuan Province, China. Diagnostic characters and illustrations are provided. Ovoviviparity is recorded in G. metallica sp. n.
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A new species of the genus Ambrostoma Motschulsky (Coleoptera, Chrysomelidae, Chrysomelinae) from South Korea, with larval descriptions and biological notes
ZooKeys, 2013Co-Authors: Lech BorowiecAbstract:Ambrostoma koreana sp. n. is described from South Korea. Detailed descriptions and illustrations of adult and all larval instars are provided and differences to closely related species are discussed. Ovoviviparity is reported for the first time in the genus Ambrostoma. Notes on distribution, host plant and biology are also provided.
