Table 1

Results of database search in Zoological Record™ (1978–2006) for several metazoan taxa. CSR = cryptic species reports.

Taxon
N CSR
N articles
N species

Arthropoda



     Insecta
996
219,754
950,000
     Crustacaea
137
45,669
52,000
     Arachnida
53
31,186
73,000
     Other Arthropoda classes
20
885
13,000
Chordata



     Mammalia
267
92,592
5,416
     Amphibia
92
20,243
5,743
     "Reptilia"
58
33,130
8,163
     Aves
94
69,899
9,917
     "Fishes"
151
97,405
28,500
     other Chordata classes
6
2,325
3,025
Mollusca



     Cephalopoda
6
7,791
768
     Bivalvia
28
17,560
30,000
     Gastropoda
86
27,794
75,000
     Other Mollusca classes
1
5,407
1,950
Nematoda
66
22,679
20,000
Plathyhelminthes
42
18,040
25,000
Annelida
49
10,646
15,000
Echinodermata
25
8,760
7,000
Porifera
15
3,906
5,000
Other Metazoan phyla
43
58,593
20,395

Pfenninger and Schwenk BMC Evolutionary Biology 2007 7:121   doi:10.1186/1471-2148-7-121