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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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20 February 2026 21:29
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John Carr
20.02.26 13:31
Canada plans to eliminate the Diptera group at the CNC. See post in the News section of the main page.

Gnats2meetu
18.02.26 09:33
Anyone have scans of the Genus Semaranga in: 1)Kanmiya, K. (1983) A systematic study of the Japanese Chloropidae (Diptera). 2) Andersson, H. (1977 Taxonomic and Phylogenetic studies on Chloropid

DedeLab
10.02.26 19:36
Hello Moumoule !

Andre
07.01.26 15:52
Pipunculidae from Mongolia! I am looking for specialist who is committed to ID these. There will be a lot of material coming from my expeditions.

John Carr
06.12.25 21:37
He last posted here in April, identifying some Chloropidae.

Sundew
04.12.25 20:02
Dr Michael von Tschirnhaus, a leading expert on Chloropidae and Agromyzidae, died on 16 September 2025 at the age of 86. He will be greatly missed by the international community. R.I.P.

nichilme
03.12.25 12:46
Anyone has the scan of "Harkness, R. D.; Ismay, J. W. 1976: A new species of Trachysiphonella (Dipt., Chloropidae) from Greece, associated with an ant Cataglyphis bicolor (F.) (Hym., Formicidae)

John Carr
01.12.25 22:29
I will try to fix the messages this month. We have to make some other configuration changes before software goes out of support at end of year.

rafael_carbonell
29.11.25 21:57
I would prefer not to receive any more messages from diptera.info signed by Paul... (Thread reply notification)... Could they be signed by ‘The diptera.info team’?

Nikita Vikhrev
19.11.25 12:31
It is with deepest sadness in my heart that I announce that on Saturday, November 15, one of the great minds of world dipterology, prof. Rudolf Rozkošny, left us forever. Please remember him with a

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