PLOS ONE2013-11-17 1:16 AM

Forever Love: The Hitherto Earliest Record of Copulating Insects from the Middle Jurassic of China

Abstract
Background
Mating behaviors have been widely studied for extant insects. However, cases of mating individuals are particularly rare in the fossil record of insects, and most of them involved preservation in amber while only in rare cases found in compression fossils. This considerably limits our knowledge of mating position and genitalia orientation during the Mesozoic, and hinders our understanding of the evolution of mating behaviors in this major component of modern ecosystems.

Principal Finding
Here we report a pair of copulating froghoppers, Anthoscytina perpetua sp. nov., referable to the Procercopidae, from the Middle Jurassic of northeastern China. They exhibit belly-to-belly mating position as preserved, with male's aedeagus inserting into the female's bursa copulatrix. Abdominal segments 8 to 9 of male are disarticulated suggesting these segments were twisted and flexed during mating. Due to potential taphonomic effect, we cannot rule out that they might have taken side-by-side position, as in extant froghoppers. Genitalia of male and female, based on paratypes, show symmetric structures.
Conclusions/Significance
Our findings, consistent with those of extant froghoppers, indicate froghoppers' genitalic symmetry and mating position have remained static for over 165 million years.

KEYWORDS

SHARE & LIKE

COMMENTS

ABOUT THE AUTHOR

PLOS ONE

0 Following 5 Fans 0 Projects 90 Articles

SIMILAR ARTICLES

AbstractAgencies that fund scientific research must choose: is it more effective to give large grants to a few elite researchers, or small grants to ma

Read More

Abstract The role of genetically modified (GM) crops for food security is the subject of public controversy. GM crops could contribute to food product

Read More

Abstract 论文摘要 Background Combination antiretroviral therapy (ART) has significantly increased survival among HIV-positive adults in the United State

Read More

AbstractThe U.S. National Institutes of Health (NIH) budget expansion from 1998 through 2003 increased demand for biomedical research, raising relative

Read More

Abstract Kawaii (a Japanese word meaning “cute”) things are popular because they produce positive feelings. However, their effect on behavior remains

Read More