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:6/19/2020)... ... June 18, 2020 , ... Join experts from Envigo ... Scientist in a live webinar on Wednesday, July 8, 2020 at 11am ... way we genetically engineer new models. However, while modifying the genome may be more ...
(Date:6/5/2020)... ... 2020 , ... Murrieta Genomics has announced that its wholly owned ... preparation for Next Generation Genomic Sequencing (NGS) . This is the third application ... sample preparation. , “I have been at the bench for over 20 years,” stated ...
(Date:5/30/2020)... ... May 29, 2020 , ... eInfochips, a leading provider ... collaborated with EchoNous Inc. to develop the cloud-based connected health KOSMOS platform that ... which has been clinically tested versus expert measurements, yielding improved results in precision ...
Breaking Biology News(10 mins):
(Date:7/1/2020)... CHARLOTTE, N.C. (PRWEB) , ... June 29, 2020 ... ... has reported year to date growth of 40% in 2020, despite many obstacles ... medical technology, MedShift aims to increase revenue for its partnered medical practices and ...
(Date:6/28/2020)... ... 25, 2020 , ... The Indoor Lab, a leading provider of sensor solutions ... all types to ensure cleanliness, distancing and occupancy with its patent pending WipeAway™ technology ... business will provide a health performance index system that scores all aspects of compliance ...
(Date:6/28/2020)... ... June 26, 2020 , ... ... solutions providers, today announced its strong opposition to the recently introduced bicameral ... a blanket ban on most federal use of nearly all biometric and related ...
(Date:6/23/2020)... ... June 22, 2020 , ... Regen Suppliers, the one stop ... buy three, get the fourth unit free with no limit on the amniotic ... as exosomes, have been a game changer for regenerative therapies. The products are ...
Breaking Biology Technology: