12th edition of Systema Naturae

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Carl Linnaeus, the author of Systema Naturae

The 12th edition of Systema Naturae was the last edition of

zoological nomenclature
.

Starting point

Only five editions of Systema Naturae were written by Linnaeus himself, namely the first, second, sixth, tenth and twelfth.

zoological nomenclature was first considered, in the Strickland Code of 1843, the 12th edition of Systema Naturae was chosen, so that any names which Linnaeus had altered from previous editions would be recorded in their final state.[3] It was later replaced by the 10th edition as the starting point for most zoological nomenclature.[4] The starting point for most names in botanical nomenclature is the 1753 work Species Plantarum.[5]

Format

Linnaeus divided the 12th edition into three volumes, the first of which was published in two parts.

back matter, the three volumes cover around 2,400 pages.[7]

Novelties

Many species were included in the 12th edition which had not been included in earlier editions. For example, Linnaeus had included 700 species of mollusc in the 10th edition, and added a further 100 species for the 12th edition.[8] Similarly, the number of bird species in the 12th edition was twice the number in the 10th edition.[9] Sponges were included in the 12th edition, in the class "Zoophyta", having been omitted from previous editions.[10] The 12th edition also included the hundred insect species published separately in Centuria Insectorum,[2] and omitted a claim which Linnaeus had made in earlier editions, that new species do not form,[11] implicitly allowing speciation. also, on the last page of book he (Linnæus.) added new genus that named "chaos" in order zoophyta, class vermes. into that order were included some species, like chaos fungorum, chaos ustilagum, chaos protheus, chaos redivivum, chaos infusorium. in fact, chaos infusorium included every known protist of 18 century. (expect volvox, that was divided into his own genus.)

References