A biological switching valve evolved in the female of a sex-role reversed cave insect to receive multiple seminal packages


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Citation

Material Information

Title:
A biological switching valve evolved in the female of a sex-role reversed cave insect to receive multiple seminal packages
Series Title:
Evolutionary Biology
Creator:
Yoshizawa, Kazunori et al
Publisher:
eLIFE
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Evolution ( local )
Sexual Selection ( local )
Novelty ( local )
Biomechanics ( local )
Psocodea ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
We report a functional switching valve within the female genitalia of the Brazilian cave insect Neotrogla. The valve complex is composed of two plate-like sclerites, a closure element, and in-and-outflow canals. Females have a penis-like intromittent organ to coercively anchor males and obtain voluminous semen. The semen is packed in a capsule, whose formation is initiated by seminal injection. It is not only used for fertilization but also consumed by the female as nutrition. The valve complex has two slots for insemination so that Neotrogla can continue mating while the first slot is occupied. In conjunction with the female penis, this switching valve is a morphological novelty enabling females to compete for seminal gifts in their nutrient-poor cave habitats through long copulation times and multiple seminal injections. The evolution of this switching valve may have been a prerequisite for the reversal of the intromittent organ in Neotrogla.
Original Version:
Evolutionary Biology, Vol. 7 (2018-10-16).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This item is licensed with the Creative Commons Attribution License. This license lets others distribute, remix, tweak, and build upon this work, even commercially, as long as they credit the author for the original creation.
Resource Identifier:
K26-05200 ( USFLDC: LOCAL DOI )
k26.5200 ( USFLDC: LOCAL Handle )

USFLDC Membership

Aggregations:
University of South Florida
Karst Information Portal

Postcard Information

Format:
serial

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