Histologische beobachtungen am Ovariolenstiel von Syntermes dirus (Isoptera)

Memórias do Instituto Oswaldo Cruz, Feb 2019

This paper gives a detailed description of the ovariole stalk and of the ovarioles of the ovary in Syntermes dirus, considering also the ovary of Nasutitermes sp. for comparison. From the results obtained, it is possible to explain the passage of the eggs through the ovariole stalk into the oviduct. The principal force for this dislocation is the three or four egg cells of each ovariole, as it is shown by the curves of Graf. 2.

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Histologische beobachtungen am Ovariolenstiel von Syntermes dirus (Isoptera)

Histologische beobachtungen am Ovariolenstiel von Syntermes dirus (Isoptera) Rudolf Barth1  Instituto Oswaldo Cruz, Rio de Janeiro, Brasil ABSTRACT Es wird eine eingehende Beschreibung des Ovariolenstiels und der Ovariolen des Ovariums von Syntermes dirus unter Heranziehung zu Vergelichszwecken des Ovariums von Nasutiterme sp. gegeben. Anhand der gewonnenen Daten ist es moeglich den Transport der Eier durch den Ovariolenstiel in den Eileiter zu erklaeren. Die Hauptkraft ist der Wachstumsschub hervorgerufen durch die bodeutende Volumen- und Laengenzunahme der drei bis vier letzten Eizellen jeder Ovariole, wie aus den Daten der Kurven in Graf. 2 hervorgeht. RESUMO Apresentamos uma descrição detalhada do pedúnculo do ovaríolo e dos ovaríolos do ovário de Synthermes dirus, considerando, para fins de comparação, também os ovários de Nasutitermes sp. Os dados obtidos possibilitam uma explicação sôbre a passagem do ôvo pelo pedúnculo, em direção ao oviduto. Esta passagem será forçada pela pressão conseqüente ao aumento de volume dos três ou quatro últimos ovos de cada ovaríolo, pressão que não se pode exercer em sentido contrário. (Ver Graf. 2). ABSTRACT This paper gives a detailed description of the ovariole stalk and of the ovarioles of the ovary in Syntermes dirus, considering also the ovary of Nasutitermes sp. for comparison. From the results obtained, it is possible to explain the passage of the eggs through the ovariole stalk into the oviduct. The principal force for this dislocation is the three or four egg cells of each ovariole, as it is shown by the curves of Graf. 2. Full text available only in PDF format. Texto completo disponível apenas em PDF.


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Rudolf Barth. Histologische beobachtungen am Ovariolenstiel von Syntermes dirus (Isoptera), Memórias do Instituto Oswaldo Cruz, 177-195, DOI: 10.1590/S0074-02761971000100015