Navigation Links
After a 49-million-year hiatus, a cockroach reappears in North America
Date:1/5/2014

The cockroach in the genus Ectobius is a major textbook example of an invasive organism, and it is the most common cockroach inhabiting a large region from northernmost Europe to southernmost Africa.

Ectobius has a long fossil history in Europe, occurring in Baltic amber that is about 44 million years old, and its lineage was believed to have been exclusively from the Old World. However, a shocking new discovery has uprooted that view. In fact, it now appears that Ectobius may have originated in the New World.

Four ancient Ectobius species were recently discovered in the 49-million-year-old Green River Formation near Rifle, Colorado in deposits that are about five million years older than the Baltic amber. However, these cockroaches soon became extinct in North America. The cause for the extinction of Ectobius in North America in the dim past is unknown, but it evidently survived in the Old World, and western Europe in particular.

"About 65 years ago, several entomologists in the northeastern United States noted that four species of Ectobius were present in North America," said corresponding author Dr. Conrad Labandeira. "It was always assumed that these four newcomers were the first Ectobius species to have ever lived in North America. But the discovery in Colorado proves that their relatives were here nearly 50 million years ago."

In many ways the history of Ectobius mirrors that of the biogeographic history of the horse. Horses occurred in the New World and became extinct during the late Pleistocene ecological crisis. Horses, attached to human habitation, were subsequently introduced to North America by early Spanish explorers about 11,000 years after their demise.

The newly discovered species of Ectobius, specifically Ectobius kohlsi, are described in the January 2014 issue of Annals of the Entomological Society of America (DOI: http://dx.doi.org/10.1603/AN13042) in an article called "Native Ectobius (Blattaria: Ectobiidae) From the Early Eocene Green River Formation of Colorado and Its Reintroduction to North America 49 Million Years Later."

This particular species is named after David Kohls, who lives near Rifle, Colorado and has been an indefatigable collector of fossil insects and plants from the nearby Green River Formation. His collection of approximately 150,000 insects from 31,000 slabs of shale now constitutes the Kohls Green River Fossil Insect Collection, which is housed in the Smithsonian's Department of Paleobiology.


'/>"/>

Contact: Dr. Conrad Labandeira
LABANDEC@si.edu
703-231-2756
Entomological Society of America
Source:Eurekalert  

Related biology news :

1. 1 year after Fukushima
2. AGU: Venice hasnt stopped sinking after all
3. Black flies may have a purpose after all
4. Estrogen hormone reveals protective ability after traumatic brain injury
5. Obstructive sleep apneas damage evident after 1 month
6. Scientists read the ash from the Icelandic volcano 2 years after its eruption
7. Microbial communities shifted dramatically after Deepwater Horizon spill
8. Regenerated cells may restore vision after corneal dysfunction
9. Cinega de Santa Clara unchanged after pilot run of Yuma Desalting Plant
10. Promiscuous squid fatigued after mating
11. Ethylene of no effect - why peppers do not mature after picking
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
After a 49-million-year hiatus, a cockroach reappears in North America
(Date:2/8/2017)... AWRE ), a leading supplier of biometrics software ... year ended December 31, 2016. Revenue for ... $6.9 million in the same quarter last year. Operating income ... to $2.6 million in the fourth quarter of 2015. Net ... or $0.02 per diluted share, which compares to $1.8 million, ...
(Date:2/8/2017)... Report Highlights The global biosurgery market should ... 2016 at a compound annual growth rate (CAGR) of ... An overview of the global market for biosurgery. - ... and 2016, and projections of compound annual growth rates ... the basis of product type, source, application, and region. ...
(Date:2/7/2017)... , February 7, 2017 ... Global Solutions Corporation [OTC: IDGS], ("Ipsidy" or the "Company") ... electronic transaction processing services, is pleased to announce the ... Company. Effective January 31, 2017, Philip ... of Directors, CEO and President.  An experienced payment industry ...
Breaking Biology News(10 mins):
(Date:2/27/2017)... February 27, 2017 A Europe-wide survey of ... researchers using animals in their research treat them with due care. ... and detailed analysis of the results indicates that there is a ... to put into practice the principles of the 3Rs (Refine, ... What ...
(Date:2/27/2017)... Feb. 27, 2017 AcelRx Pharmaceuticals, Inc. ... the development and commercialization of innovative therapies for ... the U.S. Food and Drug Administration (FDA) has ... section 505(b)(2) for DSUVIA™ (formerly ARX-04) (sufentanil sublingual ... with moderate-to-severe acute pain in a medically supervised ...
(Date:2/27/2017)... and HAMILTON, Bermuda ... (NASDAQ: ADXS ) and ... companies focused on developing cancer immunotherapies, today announced ... develop a novel cancer immunotherapy agent using Advaxis, ... SELLAS, patented WT1 targeted heteroclitic peptide antigen mixture ...
(Date:2/27/2017)... ... February 27, 2017 , ... In starting a program to hire ... grandfather, “Hire for attitude. Train for skill.” , In keeping with this philosophy, the ... as a salesman. Zamzow is hoping to replicate the practice throughout the company. , ...
Breaking Biology Technology: