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Lepidoptera genitalia

About: Lepidoptera genitalia is a research topic. Over the lifetime, 10114 publications have been published within this topic receiving 78876 citations. The topic is also known as: Uncus.


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Journal ArticleDOI
TL;DR: P. elaeisis could be an efficient alternative for controlling Lepidoptera defoliators in eucalyptus plantations in Brazil by parasitizing T. arnobia and T. leucoceraea pupae.
Abstract: Pupae of Thyrinteina arnobia (Stoll) and Thyrinteina leucoceraea Rindge (Lepidoptera: Geometridae) were obtained from Eucalyptus cloeziana F. Muell and Eucalyptus urophylla S.T. Blake plants, respectively. Specimens of a parasitoid emerged from T. arnobia pupae and also found parasitising T. leucoceraea pupae in the field were identified as Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae). This is the first report on P. elaeisis parasitizing T. arnobia and T. leucoceraea pupae in natural conditions in Brazil. P. elaeisis also parasitized these hosts and Bombyx mori Linnaeus (Lepidoptera: Bombycidae), Anticarsia gemmatalis Hubner, Pseudaletia sequax Franclemont, Alabama argillacea Huebner (Lepidoptera: Noctuidae), Dirphia moderata Bouvier (Lepidoptera: Saturniidae) and Halysidota pearsoni Watson (Lepidoptera: Arctiidae) in the laboratory. The production and release of P. elaeisis could be an efficient alternative for controlling Lepidoptera defoliators in eucalyptus plantations.

50 citations

Journal ArticleDOI
TL;DR: Relationships between temperature and development rates of eggs, overwintered second-instar larvae, and all larval stages of Choristoneura fumiferana (Clem.) fed on artificial diet were determined and computer simulations of the insect’s seasonal history are presented.
Abstract: Relationships between temperature and development rates of eggs, overwintered second-instar larvae, and all larval stages of Choristoneura fumiferana (Clem.) fed on artificial diet were determined. Egg development was observed at eight constant temperatures between 7 and 32°C. It was fastest at 30°C, and showed relatively little variability. The rate of emergence of overwintered second-instar larvae was observed at 10 constant temperatures between 4 and 33°C. Maximum development rates occurred at 30°C. Variability in emergence rates was large, but unimodal. Development rates of the second to sixth larval instars were measured at 10 constant temperatures between 7 and 36°C, and maximum rates were observed, again, at 30°C. Variability in the development rates of the larvae was large, with no correlations between the development rates of the various larval instars. The results of computer simulations of the insect’s seasonal history are presented and discussed.

49 citations

Book ChapterDOI
TL;DR: It appears that crossing over in Lepidoptera may be confined to the homogametic sex (male) and a new bilateral gynandromorph of colias philodice is figured.
Abstract: Publisher Summary The Lepidoptera known cytologically are characterized by the ZO and ZW type of sex chromosomes, with the female heterogametic (ZO or ZW) and the male homogametic (ZZ). Secondary sexual characters are independent of gonadal control or hormones circulating in the hemolymph. A new bilateral gynandromorph of colias philodice is figured. The right side is female and alba and the left side is male and normal yellow except for alba patches in the distal part of the hindwing. It is suggested that these patches are produced over cells that have become femalelike by losing one Z chromosome late in development, with the entire insect presumed to have a uniform Aa or AA genotype for the alba genes. It is not known whether colias females are ZO or ZW. The chromosome number for the five species studied in this chapter is typically 31 or 32. As in Diptera, it appears that crossing over in Lepidoptera may be confined to the homogametic sex (male).

49 citations

Book ChapterDOI
TL;DR: The idea is advanced that the evolution of the sheathed nuclear division contributed to the development of double spermatogenesis in Lepidoptera.
Abstract: Publisher Summary This chapter focuses on spindle architecture in Lepidoptera. The variability in spindle structure is illustrated by describing meiosis as well as mitosis in both sexes. Lepidoptera chromosomes are unusually small, and light microscopy has not contributed much to knowledge of chromosome structure in this group. Although observations are limited to a few species, fine structure studies suggest that Lepidoptera chromosomes represent a type intermediate between monokinetic and holokinetic chromosomes. Four different spindle types have been identified in Lepidoptera. These are somatic and gonial mitoses, female meiosis I, and divisions in eupyrene and apyrene spermatocytes. Though smaller, the spindles of spermatogonia and somatic tissues of Lepidoptera resemble those of mammalian cells. Meiosis I in female Lepidoptera is achiasmatic. Eupyrene spindles of Lepidoptera, which give rise to fertile spermatozoa, usually show a prominent spindle envelope and a rich intraspindle membrane system. Apyrene spindles, which produce sterile sperm, possess fewer membranes and microtubules (MTs) than the spindles of the “sheathed nuclear division.” Segregation of the chromatin is highly irregular in the apyrene line. The idea is advanced that the evolution of the sheathed nuclear division contributed to the development of double spermatogenesis in Lepidoptera. The acetylation status of MTs in mitotic and eupyrene meiotic spindles and its implications for MT behavior are described in the chapter.

49 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023819
20221,918
2021212
2020271
2019279