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:10/18/2018)... PARK, Kan. (PRWEB) , ... October 18, 2018 ... ... to 23andMe, Inc., a leader among services that offer direct-to-consumer DNA Testing for ... Testing seems to be everywhere. The reasons are many: some people want to ...
(Date:10/17/2018)... ... October 17, 2018 , ... Maintenance of ... patients, say 65 percent of physicians surveyed by MDLinx, a medical news, information, ... of medical specialties revealed that many physicians are frustrated with the mandated MOC ...
(Date:10/16/2018)... , ... October 15, 2018 , ... ... chain operations solutions for highly regulated industries, is a silver sponsor and exhibitor ... Diego, California. , The Biomanufacturing World Summit brings together the “who’s ...
Breaking Biology News(10 mins):
(Date:10/5/2018)... ... October 04, 2018 , ... Power ... a Spine Technology Award from Orthopedics This Week during the 2018 National Association ... T Handle is a surgical instrument that delivers operating room efficiencies through increased ...
(Date:10/5/2018)... , ... October 04, 2018 , ... ... brand identity and website that elevates the company’s brand identity and better reflects ... company offers a broader range of engineering expertise and related support services to ...
(Date:10/2/2018)... ... October 02, 2018 , ... Finalists for the 2018 World ... product line was chosen for its advancements in the production chemicals category. The ... in upstream oil applications that are positively impacting the industry. The winners will ...
(Date:9/29/2018)... , ... September 29, 2018 , ... ... enabling mid-level and early-stage companies to access the power of influence analytics and ... solutions available to a broader market that didn’t necessarily have access to the ...
Breaking Biology Technology: