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More Information about: species
Term species
Explanation Loose, practical definition: A group of individuals that can be recognised on the basis of shared morphological character traits and that resemble each other more than that they resemble inividuals with similar character traits.
One biological definition: A group of actually or potentially interbreeding populations that are reproductively isolated from other such groups (Ernst Mayr, 1963).

There are many definitions of species, many relating to the field they are applied to (identification, ecology, phylogeny, evolution, etc.). Many of the different definitions would give different results as to the species status of some populations of organisms: a population might be considered a species in the view of a evolutionary species concept but not in the view of a biological species concept. In addition it should be noted that a definition applied to one groups of organisms might not be applicabale to another group of organisms; for example groups of different evolotionary origin (bacteria, plants, vertebrates, arthropods, etc.) or groups wiht different life histories (sexually interbreeding, parthenogenetic, etc.).

Links: http://en.wikiped...biology%29, related pages and links offer a very full discussion.
Category Taxonomy
Submitted by Paul Beuk
Date Added/
Modified		 23.11.09
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eklans
24.08.25 16:55
Thanks for your proposal, but for me this option is ineligible.

rvanderweele
15.08.25 10:15
For those specialists not active on Facebook, I just ask to consider to join our group on FB. Please, be aware that it is not necessary at all to be active on FB outside the diptera group. Actually, n

rvanderweele
15.08.25 10:13
We received requests to get permission to ask for ID in our Facebook group, https://www.facebo
ok.com/groups/1798
95332035235/ Until now we pointed to diptera.info, but since Paul's passing we not

Tony Irwin
23.06.25 18:10
If you have some spare money, there is a copy (together with keys to pupae and larvae) for sale by Hermann L. Strack, Loguivy Plougras, France

smol
23.06.25 11:18
Appreciate it, Tony Irwin! I got the hint to use the key next to Langton and Pinder key for females of Chironomidae. So no specific queries, except the keys... I will keep this on my list and hope th

Tony Irwin
19.06.25 15:33
I have the hard copy book, if you have any specific queries, but I'm not scanning the 500+ pages!

smol
02.06.25 18:26
Anyone has "Chironomidae of the Holarctic region. Keys and diagnoses. Part 3. Adult Males Entomologica Scandinavica Supplement 34"? smolwaarneming@gma
il.com

Nikita Vikhrev
28.05.25 20:57
I have Russian Coenosia. nikita6510@ya.ru

smol
28.05.25 12:25
Is someone able to share with me "A key to the Russian species of the genus Coenosia"?

Nikita Vikhrev
08.05.25 18:22
I have

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