Table 4 in How many mammal species are there now? Updates and trends in taxonomic, nomenclatural, and geographic knowledge

Table 4. Summary of nomenclatural metadata released in MDD2 separated into nomenclatural status and validity status. StatusTotal namesAuthority authorAuthority yearNames since 2000Original combinationOriginal rankAuthority citationVerified authority citationNomenclature statusTotal available names28,38228,38228,3741,19128,29728,29728,31623,493Nomina nova92592592513925925925791Preoccupied names1,1001,1001,10051,0951,0951,093812Suppressed names393939039393929Total unavailable names2,1272,1272,1271222,1192,1192,1191,696Spelling variants3,4453,4453,4457183,4373,4373,4393,114Name combinations16,18216,18216,1828,46616,18216,18216,18216,135Other subsequent usages4354354352434434433386Validity statusSynonymous names42,88042,88042,8729,49442,78342,78342,79837,821Valid species6,7596,7596,7598996,7596,7596,7596,150Species inquirendae949494094949488Nomina dubia47547547529470470475414Composite type material10101001010107Hybrid type material121212112121212TotalTotal names50,23050,23050,22210,42350,12850,12850,14844,492StatusAuthority PageAuthority LinkAuthority Page LinkType LocalityOriginal Type LocalityType CoordinatesType SpecimenType Specimen LinkNomenclature statusTotal available names28,02421,82318,48328,25918,8772,77120,81113,179Nomina nova91372161591369131498242Preoccupied names1,0717636791,08671919390178Suppressed names3929293625081Total unavailable names2,0761,4801,2491,2437202819654Spelling variants3,4122,5721,50224585195Name combinations10,72811,7144,301100610104Other subsequent usages431363319226127063Validity statusSynonymous names37,00131,39320,67922,88614,24794314,9779,600Valid species6,7565,8204,6196,7595,2821,8525,9413,617Species inquirendae93806379711183Nomina dubia46739332832725549225Composite type material976106030Hybrid type material1210866010TotalTotal names44,33837,70325,70330,06719,8672,80021,03213,245 Totals for available names include preoccupied names, nomina nova, and suppressed names (all of which are also summarized separately). Totals for unavailable names include all nomenclatural status conditions that are not some form of subsequent use, while name combinations, spelling variants, and other miscellaneous subsequent uses are summarized separately (see Supplementary Data SD8 for a full list of nomenclatural and validity statuses and finer scale numeric summaries). Multiple nomenclatural labels can be applied to a single name, while only 1 validity status can be applied to a name, so column totals summarize the validity statuses.