| embryonic development of pleuropodia of the cicada, magicicada cassini. | in many insects the first abdominal segment possesses embryonic appendages called pleuropodia. here we show the embryogenesis of pleuropodial cells of the periodical cicada, magicicada cassini (fisher 1851) (insecta, homoptera, cicadidae). an antibody, anti-horseradish perioxidase (hrp), that is usually neuron-specific strongly marked the pleuropodial anlagen and revealed their ectodermal origin shortly after limb bud formation. thereafter the cells sank into the epidermis and their apical parts ... | 2006 | 19537987 |
| solid-state nmr study of the cicada wing. | wings of flying insects are part of the cuticle which forms the exoskeleton. the primary molecular components of cuticle are protein, chitin, and lipid. how these components interact with one another to form the exoskeleton is not completely understood. the difficulty in characterizing the cuticle arises because it is insoluble and noncrystalline. these properties severely limit the experimental tools that can be used for molecular characterization. solid-state nuclear magnetic resonance experim ... | 2017 | 28727439 |
| independent divergence of 13- and 17-y life cycles among three periodical cicada lineages. | the evolution of 13- and 17-y periodical cicadas (magicicada) is enigmatic because at any given location, up to three distinct species groups (decim, cassini, decula) with synchronized life cycles are involved. each species group is divided into one 13- and one 17-y species with the exception of the decim group, which contains two 13-y species-13-y species are magicicada tredecim, magicicada neotredecim, magicicada tredecassini, and magicicada tredecula; and 17-y species are magicicada septendec ... | 2013 | 23509294 |
| evolution of prolonged development: a life table analysis for periodical cicadas. | according to conventional wisdom, natural selection should favor early reproduction. prolonged development of 13 and 17 yr has been difficult to explain for periodical cicadas. earlier, i hypothesized that development may be long for periodical cicadas because fecundity increases as a function of longer development with little increased risk of mortality. in this article, i tested whether the fecundity was greater for 17-yr cicadas than for 13-yr cicadas and estimated the shape of the survivorsh ... | 1997 | 18811286 |
| sex differences noted in mercury bioaccumulation in magicicada cassini. | this study focuses on quantitative differences in mercury bioaccumulation based on the sex of the specimen. the species of interest is an herbivorous, terrestrial insect. male and female periodical cicadas (genus: magicicada) analyzed using combustion atomic absorption spectrophotometry exhibit different levels of mercury bioaccumulation. the concentration of mercury in magicicada cassini males was significantly higher than the concentration in females of the same species. | 2007 | 17553548 |
| what the buzz was all about: superfast song muscles rattle the tymbals of male periodical cicadas. | male cicadas produce mating calls by oscillating a pair of superfast tymbal muscles in their anterior abdominal cavity that pull on and buckle stiff-ribbed cuticular tymbal membranes located beneath the folded wings. the functional anatomy and rattling of the tymbal organ in 17 yr periodical cicada, magicicada cassini (brood x), were revealed by high-resolution microcomputed tomography, magnetic resonance imaging, electron microscopy, and laser vibrometry to understand the mechanism of sound pro ... | 2006 | 17012254 |
| periodical cicada: mechanism of sound production. | the species magicicada septendecim and magicicada cassini of the 17-year cicada produce sound by sequentially buckling a series of stiff ribs embedded in a flexible tymbal. each such collapse excites a damped oscillation in a resonant cavity. by this means the cavity (an abdominal air sac) is excited 10 to 12 times per muscle contraction, which permits a normal muscle to perform a task requiring very rapid repetitive activity. | 1971 | 17816488 |