Table 1 Biodiversity occurrence data statistics for 24 taxonomic classes.

From: Taxonomic bias in biodiversity data and societal preferences

  nbocc (millions) p>1 (thousands) med/sp (mad) Taxonomic precision
Aves 345.11 12.82 371 (541) 0.99
Magnoliopsida 118.21 261.01 19 (25) 0.92
Insecta 46.78 352.78 3 (3) 0.77
Liliopsida 36.75 68.99 15 (19) 0.95
Actinopterygii 14.18 30.73 27 (37) 0.92
Mammalia 10.78 11.53 15 (21) 0.88
Bryopsida 6.06 18.85 7 (9) 0.95
Gastropoda 5.85 46.99 7 (9) 0.69
Reptilia 4.98 11.30 24 (34) 0.88
Lecanoromycetes 4.97 17.79 8 (10) 0.93
Polypodiopsida 4.91 12.65 23 (31) 0.95
Amphibia 3.94 5.89 54 (76) 0.91
Agaricomycetes 3.80 23.53 4 (4) 0.93
Malacostraca 2.73 30.16 6 (7) 0.73
Globothalamea 2.68 4.07 10 (13) 0.74
Arachnida 2.17 38.11 3 (3) 0.77
Bivalvia 2.02 14.02 9 (12) 0.70
Bacillariophyceae 1.96 11.19 2 (1) 0.70
Maxillopoda 1.87 9.98 4 (4) 0.58
Pinopsida 1.57 0.91 110 (160) 0.95
Jungermanniopsida 1.41 6.93 7 (9) 0.91
Polychaeta 1.29 8.77 6 (7) 0.73
Florideophyceae 1.07 5.78 17 (24) 0.88
Anthozoa 1.03 8.64 7 (9) 0.59
Total for 24 classes 626.13 1013.39 7 (9) 0.94
Total in the GBIF 649.79 1200.38 6 (7) 0.93
  1. The number of occurrences (nbocc) was obtained before the use of any filter. The number of species (p>1) corresponds to the number of unique scientific names having at least one occurrence. In bold are the eight classes selected to study the taxonomic bias at the ordinal level. med/sp is the median number of occurrences per species and mad is the associated median deviation. Taxonomic precision is the proportion of taxa identified at least at the species level.