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:6/2/2016)... 2016   The Weather Company , an IBM Business ... industry-first capability in which consumers will be able to interact ... questions via voice or text and receive relevant information about ... Marketers have long sought an advertising solution that can ... personal, relevant and valuable; and can scale across millions of ...
(Date:5/20/2016)... MINNEAPOLIS , May 20, 2016  VoiceIt ... technology partnership with VoicePass. By working ... user experience.  Because VoiceIt and VoicePass take slightly ... two engines increases both security and usability. ... expressed excitement about this new partnership. ...
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a ... the MegaMatcher Automated Biometric Identification System (ABIS) ... large-scale multi-biometric projects. MegaMatcher ABIS can process multiple ... using any combination of fingerprint, face or iris ... MegaMatcher SDK and MegaMatcher Accelerator , ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... , ... Supplyframe, the Industry Network for electronics hardware design ... Located in Pasadena, Calif., the Design Lab’s mission is to bring together inventors ... and brought to market. , The Design Lab is Supplyframe’s physical representation of ...
(Date:6/23/2016)... 23, 2016 Apellis Pharmaceuticals, Inc. today ... trials of its complement C3 inhibitor, APL-2. The ... ascending dose studies designed to assess the safety, ... injection in healthy adult volunteers. Forty ... a single dose (ranging from 45 to 1,440mg) ...
(Date:6/23/2016)... -- On Wednesday, June 22, 2016, the NASDAQ ... Dow Jones Industrial Average edged 0.27% lower to finish at ... Stock-Callers.com has initiated coverage on the following equities: Infinity Pharmaceuticals ... NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ARLZ ... Learn more about these stocks by accessing their free trade ...
(Date:6/23/2016)... ... 2016 , ... Velocity Products, a division of Morris Group, ... exclusively for Okuma CNC machining centers at The International Manufacturing Technology Show, IMTS, ... companies with expertise in toolholding, cutting tools, machining dynamics and distribution, Velocity SMART ...
Breaking Biology Technology: