Navigation Links
Clue to mystery crustacean in parasite form
Date:5/19/2008

First identified in 1899, y-larvae have been one of the greatest zoological mysteries for over a century. No one has ever found an adult of these puzzling crustaceans, despite the plethora of these larvae in plankton, leading generations of marine zoologists to wonder just what y- larvae grow up to be. A study published in BioMed Centrals open access journal, BMC Biology, reports the transformation of the larvae into a previously unseen, wholly un-crustacean-like, parasitic form.

Y larvae, or facetotectans, are found amongst marine plankton in oceans from the poles to the tropics. In coral reef areas they occur dizzying diversity, even though they are ubiquitous and similar to the larvae of barnacles, not one adult y-organism has been identified in over 100 years of considerable searching.

Facetotectans are the only crustacean group with a taxonomy based solely on larval stages, say Henrik Glenner and Jens Hoeg (University of Copenhagen) and colleagues from Japan but the great species diversity indicates that the adults play an important ecological role. Supported by the Carlsberg Foundation in Denmark and the Lake Biwa Museum in Japan, the study authors collected the study authors collected over 40 species of y larvae from one site at Sesoko Island near Okinawa, Japan, and exposed many of them to a crustacean moulting-hormone to encourage them to mature. The free-swimming y-larvae shed their articulated exoskeleton, and a simple, slug- like, pulsing mass of cells emerged.

The authors explain The musculature and compound eyes that you might expect to see in adult crustaceans were in a state of degeneration, and from our observations of the live, and also preserved specimens, we conclude that the adults of these larvae must be parasites but of what we do not know.

The closest relatives of the facetotectans among the crustaceans are barnacles and another group, the Ascothoracida, both of which have similar larval stages and both of which have parasitic representatives. The stage induced in this study the so called ypsigons are not adults but another juvenile, post y-larva stage; the similarity between them and juveniles of the highly specialised parasitic rhizocephalan barnacles is, according to Glenner and colleagues, a remarkable example of convergent evolution.

The great diversity of Facetotecta and the finding that they are most likely parasitic as adults hints at a major ecological role that future studies, both in laboratories and in the field will try to uncover. These finding provide a tantalising glimpse of the solution to this 100-year-old riddle.


'/>"/>

Contact: Charlotte Webber
charlotte.webber@biomedcentral.com
44-020-763-19980
BioMed Central
Source:Eurekalert  

Related biology news :

1. MIT solves gravity-defying bird beak mystery
2. MIT-led teams unravel heparin death mystery
3. Ancient lemurs little finger poses mystery
4. Mystery behind the strongest creature in the world
5. Bright lights: Mystery of glowing antibody solved by Scripps research scientists
6. Has the mystery of the Antarctic ice sheet been solved?
7. UCLA researchers solve decade-old mystery
8. Ancient mystery solved
9. ASU professor helps solve mystery of glassy water
10. 480-million-year-old fossil sheds light on 150-year-old paleontological mystery
11. Time-sharing tropical birds key to evolutionary mystery
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Clue to mystery crustacean in parasite form
(Date:1/6/2017)... -- Delta ID Inc., a leader in consumer-grade iris scanning ... CES® 2017. Delta ID has collaborated with Gentex Corporation ... of iris scanning as a secure, reliable and convenient ... car, and as a way to elevate the security ... ID and Gentex will demonstrate (booth #7326 LVCC) a ...
(Date:1/4/2017)... VEGAS , Jan. 4, 2017  CES ... performance biometric sensor technology, today announced the launch ... sensor systems, the highly-accurate biometric sensor modules ... biometric technology, experience and expertise. The two ... Benchmark designed specifically for hearables, and Benchmark BW2.0, ...
(Date:12/22/2016)... 20, 2016  As part of its longstanding mission to ... genetics company, recently released its latest children,s book, titled ... focuses on the topics of inheritance and variation of traits ... taught in elementary school classrooms in the US. ... illustrator Ariana Killoran , whose previous book with 23andMe, ...
Breaking Biology News(10 mins):
(Date:1/12/2017)... ... January 12, 2017 , ... Huffman Engineering, Inc. , a leader ... work in the company’s Lincoln office as a chemical engineer. In his new ... for customers in the life science manufacturing and water/wastewater industries. , Prior to joining ...
(Date:1/12/2017)... 12, 2017 A new report published by Allied Market Research ... Opportunity Analysis and Industry Forecast, 2014-2022," projects that the global in vitro toxicity testing ... a CAGR of 15.07% during the forecast period. Continue ... ... ...
(Date:1/11/2017)... ... January 11, 2017 , ... ... with accurate and reliable preimplantation genetic screening (PGS). , “Our genetics and IVF ... says Ovation Fertility Genetics Scientific Director Amy Jones, M.S., ELD (ABB) , ...
(Date:1/11/2017)... (PRWEB) , ... January 11, 2017 , ... ... each year and costing healthcare systems more than $23.7 billion, healthcare systems ... costs. , Among the most common sepsis-causing pathogens are bacteria and the ...
Breaking Biology Technology: