Navigation Links
Clue to mystery crustacean in parasite form

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
BioMed Central

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:
Related Image:
Clue to mystery crustacean in parasite form
(Date:11/2/2015)... 2015  SRI International has been awarded a contract ... services to the National Cancer Institute (NCI) PREVENT Cancer ... expertise, modern testing and support facilities, and analytical instrumentation ... toxicology studies to evaluate potential cancer prevention drugs. ... Cancer Drug Development Program is an NCI-supported pipeline to ...
(Date:10/29/2015)... 2015  Connected health pioneer, Joseph C. Kvedar ... technology-enabled health and wellness, and the business opportunities that ... The Internet of Healthy Things . Long before ... existed, Dr. Kvedar, vice president, Connected Health, Partners HealthCare, ... moving care from the hospital or doctor,s office into ...
(Date:10/27/2015)... SAN JOSE, Calif. , Oct. 27, 2015 /PRNewswire/ ... human interface solutions, today announced that Google has adopted ... family of touch controller solutions to power its newest ... Nexus 6P by Huawei. --> ... ecosystem partners like Google to provide strategic collaboration in ...
Breaking Biology News(10 mins):
(Date:11/27/2015)... Nov. 27, 2015 /PRNewswire/--  Mallinckrodt plc (NYSE: ... that it has closed the sale of its global ... (GBT- NYSE Euronext) in a transaction valued at approximately ... facilities and a total of approximately 1,000 employees spread ... St. Louis area. This entire workforce ...
(Date:11/26/2015)... 2015 ... Research Laboratories, a leading independent and ... has formed a strategic partnership with ... Health for joint work on clinical ... ) , --> ,     ...
(Date:11/25/2015)... Nov. 25, 2015  PharmAthene, Inc. (NYSE MKT: PIP) ... a stockholder rights plan (Rights Plan) in an effort ... carryforwards (NOLs) under Section 382 of the Internal Revenue ... PharmAthene,s use of its NOLs could be substantially ... defined in Section 382 of the Code. In general, ...
(Date:11/25/2015)... HOLLISTON, Mass. , Nov. 25, 2015 ... a biotechnology company developing bioengineered organ implants for life-threatening ... will present at the LD Micro "Main Event" investor ... PT. The presentation will be webcast live and posted ... also be available at the conference for one-on-one meetings ...
Breaking Biology Technology: