mollwollfumble said:
mollwollfumble said:
Found this table from the year 1958.
900,000 insects
45,000 chordates
45,000 mollusks
40,000 spiders and allies
35,000 protozoans
25,000 crustaceans
20,000 roundworms
10,000 coelenterates
7,000 flatworms
6,500 segmented worms
5,000 sponges
What’s the situation now, 60 years later?
http://www.marinespecies.org/aphia.php?p=stats
Well, sea living species that have been recorded (excluding duplicate names but including species not yet officially accepted).
59,856 chordates (does not include those on land)
117,611 mollusks
2,372 protozoans
87,292 arthropods (including crustaceans and others)
10,793 roundworms
23,504 coelenterates
23,375 flatworms
28,398 segmented worms
18,853 sponges
About 800,000 insects species have been catalogued.
This recent paper https://www.ncbi.nlm.nih.gov/pubmed/28938083
Estimates:
5.5 million insects
1.5 million spiders and allies
But last year, someone in Australia came up with only 1.6 million insect species.