Fine structure of the insect micropyle—III. Ultrastructure of the egg of chrysopa carnea steph. (Neuroptera : Chrysopidae)

Mazzini, Massimo

doi:10.1016/0020-7322(76)90027-1

Cited by 18 publications

(11 citation statements)

References 29 publications

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“…Recent chrysopid eggs are almost always ellipsoidal in shape, having a single disk‐like micropylar area at their distal end (Fig. H, I) (Mazzini ; Canard et al . ; Gepp ).…”

Section: Discussionmentioning

confidence: 99%

The hatching mechanism of 130‐million‐year‐old insects: an association of neonates, egg shells and egg bursters in Lebanese amber

et al. 2018

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Hatching is a pivotal moment in the life of most animals. Diverse chemical, behavioural and mechanical methods have evolved in metazoans to break the egg membranes. Among them, many arthropod and vertebrate embryos hatch using ephemeral, frequently convergent structures known as egg bursters. However, the evolutionary processes by which hatching mechanisms and related embryonic structures became established in deep time are poorly understood due to a nearly complete absence from the fossil record. Herein we describe an exceptional c. 130-millionyear-old association in Lebanese amber composed of multiple neonate green lacewing larvae, Tragichrysa ovoruptora gen. et sp. nov. (Neuroptera, Chrysopoidea), and conspecific egg remains. Egg bursters with a serrated blade bearing a short process are attached to three longitudinally split egg shells. Embryos of extant green lacewing relatives (Chrysopidae) utilize this egg burster morphotype to open a vertical slit on the egg, after which the burster is moulted and left joined to the empty egg shell. Additionally, the new larval species has extremely elongate dorsal tubercles, an adaptation to carry exogenous debris for protection and camouflage also known from other Cretaceous chrysopoids but absent in modern relatives. The present discovery demonstrates that the hatching mechanism of modern green lacewings was established in the chrysopoid lineage by the Early Cretaceous and proves through direct fossil evidence how some morphological traits related to hatching and linked behaviours, at least in insect embryos, have been subject to a high degree of evolutionary conservatism.

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“…Recent chrysopid eggs are almost always ellipsoidal in shape, having a single disk‐like micropylar area at their distal end (Fig. H, I) (Mazzini ; Canard et al . ; Gepp ).…”

Section: Discussionmentioning

confidence: 99%

The hatching mechanism of 130‐million‐year‐old insects: an association of neonates, egg shells and egg bursters in Lebanese amber

et al. 2018

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“…Sperm entry through the micropylar canals of the egg has been well demonstrated by LM, SEM, and TEM in Musca (Degrugillier andLeopold, 1973, 19761, Drosophila (Perotti, 19751, Chrysopa (Friedlander, 1980;Mazzini, 1976), Teleogryllus (Pohlhammer, 1978) and Brudysia (syn. Sciara) (Wenzel et al, 1990) (Fig.…”

Section: Egg Shapementioning

confidence: 95%

From egg to pole cells: Ultrastructural aspects of early cleavage and germ cell determination in insects

Zissler

1992

Microscopy Res & Technique

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Insect eggs are giant and very complex cells covered by an extremely resistant shell. Both the egg cell and surrounding eggshell express anteroposterior and ventrodorsal polarity. The molecular and cytoplasmic organization of both axes originates during oogenesis and leads to the production of an ooplasmic system which consists of euplasm and deutoplasm (yolk) and contains a nucleus as well as extranuclear determinants of maternal origin. Both are part of the store of information for early embryogenesis. In addition, the deutoplasm serves as raw material and early nutrient supply for building the embryo. The insect egg cell, which is arrested in the first maturation division when released from the ovary during oviposition, will be activated by different stimuli among different species to complete meiosis and start embryogenesis. The zygote nucleus undergoes a number of synchronous mitotic divisions leading to cleavage energids which initially form a syncytial blastoderm and subsequently the cellular blastoderm. In many insects, prior to blastoderm formation, polar granules (or oosome material) are incorporated in a single cell or a small number of cells which bud off at the posterior pole. These so called pole cells give rise to the primordial germ cells. Therefore, polar granules or the oosome material mark the germ line, and while structural counterparts of determinants of body pattern formation have so far not been found, the polar granules or oosome serve as an autonomous ooplasmic determinant for the pole or germ cells. Anteroposterior body polarity can arise independent of the germ plasm.

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“…Poseen micropilo aparente (Figs. 28-35), a veces blanco muy llamativo, y poseen frecuentes esculturas sobre el corion y dispersos aeropilos (Smith, 1921(Smith, , 1922aWithycombe, 1925;Killington, 1936;Mazzini, 1976;Duelli, 1984c;Gepp, , 1984bGepp, , 1990Monserrat, 1984cGrimal, 1986), que a veces le dan al huevo, incluso a simple vista, un aspecto aterciopelado.…”

Section: (Ver Suarius Walsinghami)unclassified

Los crisópidos de la Península Ibérica y Baleares (Insecta, Neuropterida, Neuroptera: Chrysopidae)

Monserrat¹

2016

GRAELLSIA

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RESUMENSe revisan las especies de crisópidos presentes en la fauna de la Península Ibérica e Islas Baleares donde, hasta la fecha, están representadas por 50 especies pertenecientes a 13 géneros. Tras una diagnosis de la familia y citar algunos elementos sobre su historial paleontológico y su distribución, se aportan algunos datos generales sobre su morfología y su biología, sus estadios juveniles y comportamiento, y se comenta una breve introducción sobre la historia en el conocimiento de la familia, y en particular en la Península Ibérica y Baleares. Se anotan algunas correcciones en las fechas de publicación de algunos taxa que afectan a la taxonomía, y por ello se propone a Rexa almerai (Navás, 1919) n. comb. como sinónima anterior de Rexa lordina Navás, 1920 n. syn. Se incluye una lista de las especies pertenecientes a la fauna de la Península Ibérica y Baleares, una clave de identificación de los imagos de las subfamilias, géneros y especies citadas, y una clave de sus larvas a nivel genérico. De cada una de estas especies se recopilan y se anotan todas las referencias bibliográficas existentes desde 1972, relativas a las especies de la zona estudiada, tanto con la denominación actualmente aceptada, como de sus sinonimias y/o cualquier otra combinación nomenclatural bajo las cuales han sido citadas. También de cada una de las especies se anotan los datos conocidos y los ahora aportados (299 nuevos ejemplares de 25 especies) sobre su distribución general, aspectos de su morfología externa y/o genital, así como de su variabilidad, estadios juveniles, biología, fenología y distribución altitudinal y geográfica en la península y archipiélago balear, en base a un total de 20.667 ejemplares estudiados.http://lsid:zoobank.org:pub:DAF40D47-BB5B-444B-9A3C-463BBB4F5382Palabras clave: Insecta; Neuroptera; Chrysopidae; Revisión; Taxonomía; Faunística; Morfología; Península Ibérica; Islas Baleares; España; Portugal. SUMMARY Green-lacewings (Insecta, Neuropterida, Neuroptera: Chrysopidae) of the Iberian Peninsula and Balearic IslandsThe present contribution reviews the green lacewing fauna of the Iberian Peninsula and Balearic Islands where, to date, 50 species belonging to 13 genera are known to occur. After a diagnosis of the family Chrysopidae, its paleontological history and distribution, as well as some general data on its morphology and biology, juvenile stages and behavior are presented. This general information is followed by a brief history of studies on the family, and particularly those on the Iberian Peninsula and Balearic Islands. Some corrections are reported for earlier publications dates that have undergone taxonomical changes. Thus, Rexa almerai (Navás, 1919) n. comb. is proposed as junior synonym of Rexa lordina Navás, 1920 n. syn.; and is included in the list of chrysopid species belonging to the fauna of the Iberian Peninsula and Balearic Islands. A key for identifying imagoes of the subfamilies, genera, and species recorded from the region and a generic level key for the larvae are presented. For th...

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Fine structure of the insect micropyle—III. Ultrastructure of the egg of chrysopa carnea steph. (Neuroptera : Chrysopidae)

Cited by 18 publications

References 29 publications

The hatching mechanism of 130‐million‐year‐old insects: an association of neonates, egg shells and egg bursters in Lebanese amber

The hatching mechanism of 130‐million‐year‐old insects: an association of neonates, egg shells and egg bursters in Lebanese amber

From egg to pole cells: Ultrastructural aspects of early cleavage and germ cell determination in insects

Los crisópidos de la Península Ibérica y Baleares (Insecta, Neuropterida, Neuroptera: Chrysopidae)

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