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© Rune Midtgaard

Chronology of species descriptions of the reptiles of Denmark  (click on diagrams to enlarge)

Frequency of new reptile species descriptions for Denmark (1758-2018)

Cumulative frequency of new reptile species descriptions for Denmark (1758-2018)

General remarks: The diagrams show the descriptions of the currently recognized, native, extant species in Denmark, as they have appeared since 1758, the beginning of modern, Linnaean taxonomy. Some species may previously have been regarded as subspecies or synonyms of other species and later revalidated or raised to status as separate species. Hence, the diagram may not show the exact number of recognized species at the time of a particular year, but rather the number of species now recognized, whether they were considered valid species at that time or not. Moreover, many species were not reported from some countries and regions of their presently known distribution until long after they were described.

The diagrams above are based on the following statistic:

Year	Frequency of new species descriptions	Cumulative frequency of new species descriptions	Described species
1758	5	5	Anguis fragilis / Western European Slowworm (Sauria: Anguidae) Caretta caretta / Loggerhead Sea Turtle (Testudines: Cheloniidae) Lacerta agilis / Northern Eurasian Sand Lizard (Sauria: Lacertidae) Natrix natrix / Common European Grass Snake (Serpentes: Colubridae) Vipera berus / Northern Eurasian Viper (Serpentes: Viperidae)
1761	1	6	Dermochelys coriacea / Leatherback Sea Turtle (Testudines: Dermochelyidae)
1823	1	7	Zootoca vivipara / Viviparous Lizard (Sauria: Lacertidae)
1880	1	8	Lepidochelys kempii / Atlantic Ridley Sea Turtle (Testudines: Cheloniidae)