Navigation Links
Tarantulas shoot silk from feet
Date:5/15/2011

Next, Rind had to prove that the silk had come from the spiders' feet and not their web-spinning spinnerets. Filming the Chilean rose tarantulas as they were rotated vertically, Rind, Benjamin-James Duncan and Alexander Ranken disregarded any tests where other parts of the spiders' bodies contacted the glass and confirmed that the feet were the source of the silk. Also, the arachnids only produced their safety threads when they slipped.

But where on the spiders' feet was the silk coming from? Having collected all of the moulted exoskeletons from her Mexican flame knee tarantula, Fluffy, when she was young, Rind looked at them with a microscope and could see minute threads of silk protruding from microscopic hairs on Fluffy's feet. Next, the team took a closer look at moults from Fluffy, the Chilean rose tarantulas and Indian ornamental tarantulas with scanning electron microscopy and saw minute reinforced silk-producing spigots, which extended beyond the microscopic attachment hairs on the spiders' feet, widely distributed across the foot's surface. Rind also looked at the tarantula family tree, and found that all three species were only distantly related, so probably all tarantula feet produce the life-saving silk threads.

Finally, having noticed the distribution of the spigots, Rind realised that tarantulas could be the missing link between the first silk-producing spiders and modern web spinners. She explains that the spread of spigots on the tarantula's foot resembled the distribution of the silk spigots on the abdomen of the first silk spinner, the extinct Attercopus spider from 386 million years ago. The modern tarantula's spigots also looked more similar to mechanosensory hairs that are distributed over the spider's entire body, possibly making them an evolutionary intermediate in the development of silk spinning. So, not only has Fluffy settled a heated scientific debate but she also may be a link to the silk spinners of the past.


'/>"/>

Contact: Kathryn Knight
kathryn@biologists.com
44-078-763-44333
The Company of Biologists
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Shootingstars provide clues to likely response of plants to global warming
2. Root or shoot
3. Origin of root offshoots revealed
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)... You,ve been here before: you desperately need to sign into ... key or the answer to your secret question. What,s your ... Today, Hoyos Labs , a digital infrastructure security ... an end to the frustration that comes with usernames, passwords ... a user,s smartphone to acquire his or her biometrics to ...
(Date:12/10/2014)... 08, 2014 Research and Markets ... the "Biometrics Market in Japan 2014-2018" ... http://photos.prnewswire.com/prnh/20130307/600769 The integration of ... rural banking and upgradation of the driver,s license ... the market. Besides the aforementioned projects, biometrics is ...
(Date:12/4/2014)... GARDENS, Fla. , Dec. 3, 2014 /PRNewswire/ ... solutions, today announced that its DigitalPersona ® ... fingerprint readers have been deployed throughout First Bank ... , South Carolina and ... in Southern Pines, North Carolina ...
Breaking Biology News(10 mins):The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3
... survival strategy of the parasite that causes sleeping sickness could ... found that the parasite, which can transform itself into either ... these. One of these types ensures infection in the bloodstream ... by the tsetse fly and spread to another person or ...
... is available in German . It would ... would have similar genetic blueprints. However, scientists from the Max ... with an international research team have now decoded, for the ... ( Arabidopsis lyrata ), a close relative of the thale ...
... release is available in Spanish . ... Agriculture (USDA) scientists and colleagues can improve polymerase chain ... PCR-based tests are prized tools for diagnosing plant ... among other economic harm. But the test,s ability to ...
Cached Biology News:Evolution can cause a rapid reduction in genome size 2Evolution can cause a rapid reduction in genome size 3New technique improves sensitivity of PCR pathogen detection 2
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one of the nation’s ... Pharm.D. to the newly created position of Vice President ... Dr. Maroulis will continue to manage the entire specialty ... pharmacies as the company expands. Dr. Maroulis has been ... has served in many different capacities in the pharmacy, ...
(Date:12/19/2014)... 2014 Research and Markets ( ... "Technology Innovations in Smart Fabrics (Technical Insights)" ... http://photos.prnewswire.com/prnh/20130307/600769 The Research ... a detailed assessment on technological advancements and market ... 1. The Smart Fabrics market is ...
(Date:12/19/2014)... Reports from CDC show approximately ... one or more chronic health conditions - including cardiovascular ... some of these diseases, but may not eliminate the ... While implanted nerve stimulation devices today offer relief, they ... can induce side effects. , To eliminate the ...
(Date:12/19/2014)... Mass. , Dec. 18, 2014  Decision Resources ... dental biomaterial market will grow moderately through 2023 ... procedures and growing awareness of dental biomaterials all spur ... markets such as China and ... will bring dental procedures within reach for a larger ...
Breaking Biology Technology:BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Technology Innovations in Smart Fabrics (Technical Insights) 2Draper Wins GSK Funding for Smaller, Smarter Implantable Devices 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 3
... Development of Nano-Materials for Angiogenesis Applications , ... OmegaGenesis announced today that they have entered into a ... nano-materials used for Angiogenesis applications. , , ... variety of medical applications ranging from tissue reactivation and healing ...
... 3 Combination Rule Trial for NDA Submission , ... N.J., Dec. 15 QRxPharma Limited (ASX: QRX and ... the development and commercialization of therapies for pain and ... a comparative study to evaluate the efficacy and safety ...
... N.Y., Dec. 15 Allscripts,announced today that ... multispecialty group practice, has selected Allscripts,Practice Management ... for their 190 physicians. , ... ) , ...
Cached Biology Technology:OmegaGenesis Announces Angiogenesis Application Collaboration 2OmegaGenesis Announces Angiogenesis Application Collaboration 3QRxPharma Initiates Comparative Study for MoxDuoIR(TM) Dual-Opioid(TM) Pain Therapy 2QRxPharma Initiates Comparative Study for MoxDuoIR(TM) Dual-Opioid(TM) Pain Therapy 3Community Care Physicians Selects Allscripts Practice Management System for 190 Physicians in New York Capitol Region 2Community Care Physicians Selects Allscripts Practice Management System for 190 Physicians in New York Capitol Region 3Community Care Physicians Selects Allscripts Practice Management System for 190 Physicians in New York Capitol Region 4Community Care Physicians Selects Allscripts Practice Management System for 190 Physicians in New York Capitol Region 5
Anti-DDDDK-Tag (Enterokinase Cleavage Site), Agarose Conjugate Research Focus: tag Storage: 4C Shipping Temperature: 4C...
Goat polyclonal to XAGE1 ( Abpromise for all tested applications). Antigen: Synthetic peptide: CGFGFRRQGEDNT, corresponding to C terminal amino acids 149-160 of Human XAGE1 Entrez Gene ID: 9...
Sheep polyclonal to Staphylococcus DNase ( Abpromise for all tested applications). Antigen: Full length native protein (purified)....
Mouse monoclonal [MN-8C4] to zona radiata ( Abpromise for all tested applications). Antigen: Purified eggshell proteins (zona radiata proteins and small amounts of zona pellucida proteins) from ...
Biology Products: