Navigation Links
Exceptionally well preserved insect fossils from the Rhône Valley
Date:9/2/2014

In Bavaria, the Tithonian Konservat-Lagersttte of lithographic limestone is well known as a result of numerous discoveries of emblematic fossils from that area (for example, Archaeopteryx). Now, for the first time, researchers have found fossil insects in the French equivalent of these outcrops - discoveries which include a new species representing the oldest known water treader.

Despite the abundance of fossils in the equivalent Bavarian outcrops, fewer fossils have been obtained from the Late Kimmeridgian equivalents of these rocks in the departments of Ain and Rhne in France. Many outcrops are recorded (for example Cerin and Orbagnoux), but the fauna found there is essentially of marine origin, being made up of crustaceans and fishes. Some layers have provided dinosaur footprints, but until today's announcement the only known terrestrial organisms were plant remains transported into the ancient lagoons.

During the course of two field expeditions in 2012 and 2013 French researchers working with the help of two active teams of amateur scientists (Socit des Naturalistes et Archologues de l'Ain and the Group 'Sympetrum Recherche et Protection des Libellules') discovered the first insects from the Orbagnoux outcrop, together with traces of activities of these organisms on leaves and in the sediment.

The newly discovered insect was described today, in the open access journal PeerJ. The bug was 6 mm long and is the oldest record of the aquatic bug lineage of the Gerromorpha which comprises the water striders and the water measurers. This is the oldest known water treader (Mesoveliidae), the sister group of all other gerromorphan lineages. In a similar manner to some of its recent relatives, this aquatic bug could have lived in brackish environments.

In addition, traces of insect activity on plants were found, comprising surface feeding traces on Zamites leaves. Such traces are quite rare in the fossil record and in this situation they demonstrate the presence of strictly terrestrial insects on the emerged lands that were surrounded by these Jurassic lagoons.

The exquisite quality of preservation of the fossils suggests that these rocks are likely to provide new fossil insects of crucial importance for the knowledge of the Upper Jurassic insect fauna, an important transition period in the evolution of the terrestrial environments towards the Lower Cretaceous diversification of the flowering plants.


'/>"/>

Contact: Nel Andre
anel@mnhn.fr
PeerJ
Source:Eurekalert  

Related biology news :

1. Exceptionally well preserved insect fossils from the Rhône Valley
2. VIB exceptionally sceptical about the Sralini research
3. VIB exceptionally sceptical about the Séralini research
4. The blood preserved in the pumpkin did not belong to Louis XVI
5. Unique chromosomes preserved in Swedish fossil
6. Scientists find oldest occurrence of arthropods preserved in amber
7. Preserved frogs hold clues to deadly pathogen
8. Mobile app makes ID of harmful plants, insects in Texas a snap
9. Museum specimens, modern cities show how an insect pest will respond to climate change
10. Oregon team to study impacts of climate change on pesky forest insect
11. No excess baggage: Antarctic insects genome, newly sequenced, is smallest to date
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Exceptionally well preserved insect fossils from the Rhône Valley
(Date:4/26/2016)... -- Research and Markets has announced the ...  report to their offering.  , ,     (Logo: ... forecast the global multimodal biometrics market to grow ... 2016-2020.  Multimodal biometrics is being implemented ... healthcare, BFSI, transportation, automotive, and government for controlling ...
(Date:4/13/2016)... April 13, 2016  IMPOWER physicians supporting Medicaid patients ... a new clinical standard in telehealth thanks to a ... the higi platform, IMPOWER patients can routinely track key ... body mass index, and, when they opt in, share ... visit to a local retail location at no cost. ...
(Date:3/22/2016)... PUNE, India , March 22, 2016 ... new market research report "Electronic Sensors Market for ... Fingerprint, Proximity, & Others), Application (Communication & ... and Geography - Global Forecast to 2022", ... consumer industry is expected to reach USD ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... April 29, 2016 Elekta is ... update to its industry-leading treatment planning software, is available ... Monaco version 5.11 provides significant performance ... calculation speeds up to four times faster than in ... the industry,s gold standard Monte Carlo ...
(Date:4/28/2016)... New York, NY (PRWEB) , ... April 28, ... ... plan, QuickSTAT has made significant investments in recruiting top industry experts, and expanding ... IT Platform, which provides industry-leading tools for clients to manage their clinical trial ...
(Date:4/27/2016)... ... April 27, 2016 , ... ... screen mobile devices with fingerprint recognition for secure access, voice recognition for hands-free ... few ways consumers are interacting with biometrics technology today. But if they ...
(Date:4/27/2016)... ... April 27, 2016 , ... ... to its Scientific Advisory Board. Dr. Lamka will assist PathSensors in expanding the ... , PathSensors deploys the CANARY® test platform for the detection of harmful ...
Breaking Biology Technology: