Navigation Links
Misleading morphology: 3 European parasitoid wasp 'species' are seasonal forms of just 1
Date:10/26/2011

Three widely differing forms of European Scambus parasitoid wasps that had previously been regarded as distinct species are shown to be seasonal morphs of a single species. The collaboration involved National Museums Scotland (Mark Shaw), a private individual (Malcolm Jennings) and Imperial College London + Natural History Museum (Donald Quicke). It was published in the open access Journal of Hymenoptera Research.

The findings depended on examination of museum collections with good data standards, targeted fieldwork to rear specimens from known hosts at different times of year, and experimental rearings of progeny from spring females through summer hosts. DNA sequence data provided confirmation that the rearing results were real, and not the result of overlooked contaminants.

The adults of these parasitoids paralyse their concealed hosts, which are small caterpillars or beetle larvae, before laying an egg beside the host. The host remains paralysed and is consumed by the resulting parasitoid larva, which then pupates and eventually becomes an adult, emerging from the same place. One morph (S. planatus: Fig.1), which occurs in spring, has a robust head to accommodate the powerful muscles needed to chew out of acorns in which it has been a parasitoid of micromoth and weevil larvae attacked the previous autumn. Females of this morph live for several weeks, during which they become darker and their abdomen broadens considerably (S. ventricosus). Towards the middle of summer, this morph matures its eggs and parasitises micromoth larvae living in relatively soft silken retreats among foliage. Within a few weeks, adults of the next generation emerge from this substrate, having much less powerful heads (S. calobatus: Fig. 2), and these adults then seek tenented acorns in which to oviposit in autumn. The spring-emerging and summer-emerging forms also differ in their ovipositor lengths. This life-cycle was confirmed experimentally by allowing the S. ventricosus morph, originating from acorns, to parasitise the summer hosts which then produced adults of the S. calobatus morph. Because S. calobatus is the oldest of the three names, this is the one that has to be used for this seasonally variable, but none-the-less single, species in the future.

"It was satisfying to be able to follow this hunch through to such a conclusive result" says the senior author Mark Shaw. "It shows the importance of good collections, careful field work, and focussed experimentation. Almost certainly there will be other similar cases."


'/>"/>
Contact: Mark Shaw
markshaw@xenarcha.com
44-013-166-70577
Pensoft Publishers
Source:Eurekalert  

Related biology news :

1. Genomatix to partner in $41 million European epigenomics consortium
2. Pesticides pollute European waterbodies more than previously thought
3. Some like it hot -- European fish stocks changing with warming seas
4. European Congress on Osteoporosis & Osteoarthritis opens online registration
5. Getting 50-year-old Americans as healthy as Europeans could save Medicare and Medicaid $632 billion by 2050
6. European Bioinformatics Institute to lead UK PubMed Central in 2011-2016
7. For the first time, the European IVF Monitoring Group reports on cycles using frozen eggs
8. Atlas of European Millipedes published by Pensoft
9. European Multidisciplinary Cancer Congress 2011
10. Pan-European research project for clean air
11. EUREKA, the largest European network for industrial R&D and innovation, launches E!NNOVEST
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Misleading morphology: 3 European parasitoid wasp 'species' are seasonal forms of just 1
(Date:2/2/2016)... 2016 Technology Enhancements Accelerate Growth of X-ray Imaging ... digital and computed radiography markets in Thailand ... Indonesia (TIM). It provides an in-depth ... well as regional market drivers and restraints. The study ... and market attractiveness, both for digital and computed radiography. ...
(Date:2/1/2016)... Fla. , Feb. 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ... and television personality, Joey Fatone . Las Vegas ... greet fans. --> Las Vegas , where ... --> The new video ad was filmed at the Consumer ... appeared at the Wocket booth to meet and greet fans. ...
(Date:1/22/2016)... DUBLIN , January 22, 2016 ... has announced the addition of the  ... to their offering. --> ... of the  "Global Behavioral Biometric Market ... --> Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ...
Breaking Biology News(10 mins):
(Date:2/9/2016)... LONDON , February 9, 2016 ... replace paper and protect IP   E-WorkBook ... will be rolled out in Germany ... and protect valuable IP. Users will be able to search ... or experiment as part of the application, to boost collaboration ...
(Date:2/9/2016)... , Feb. 9, 2016 ... Insights, 2016", report provides in depth insights ... activities around the Protein-Tyrosine Phosphatase 1B (PTP1B) ... profiles in various stages of development including ... Phase III and Preregistration. Report covers the ...
(Date:2/8/2016)... 2016  CytRx Corporation (NASDAQ: CYTR ), ... oncology, today announced that it has entered into ... Technology Growth Capital, Inc. and Hercules Technology III, ... --> --> ... financing under the loan and security agreement.  The ...
(Date:2/8/2016)... , ... February 08, 2016 , ... ... of Directors. Todorow is the Executive Vice President for Corporate Services and the ... oversees Finance, Accounts Payable, Payroll, Billing Operations, Treasury, Managed Care Contracting, Supply Chain, ...
Breaking Biology Technology: