Nomen dubium

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In zoological nomenclature, a nomen dubium (Latin for "doubtful name", plural nomina dubia) is a scientific name that is of unknown or doubtful application. Nomen dubium_sentence_0

In zoology Nomen dubium_section_0

In case of a nomen dubium it may be impossible to determine whether a specimen belongs to that group or not. Nomen dubium_sentence_1

This may happen if the original type series (i. e. holotype, isotypes, syntypes, and paratypes) is lost or destroyed. Nomen dubium_sentence_2

The zoological and botanical codes allow for a new type specimen, or neotype, to be chosen in this case. Nomen dubium_sentence_3

A name may also be considered a nomen dubium if its name-bearing type is fragmentary or lacking important diagnostic features (this is often the case for species known only as fossils). Nomen dubium_sentence_4

To preserve stability of names, the International Code of Zoological Nomenclature allows a new type specimen, or neotype, to be chosen for a nomen dubium in this case. Nomen dubium_sentence_5

For example, the crocodile-like archosaurian reptile Parasuchus hislopi Lydekker, 1885 was described based on a premaxillary rostrum (part of the snout), but this is no longer sufficient to distinguish Parasuchus from its close relatives. Nomen dubium_sentence_6

This made the name Parasuchus hislopi a nomen dubium. Nomen dubium_sentence_7

In 2001 a paleontologist proposed that a new type specimen, a complete skeleton, be designated. Nomen dubium_sentence_8

The International Commission on Zoological Nomenclature considered the case and agreed in 2003 to replace the original type specimen with the proposed neotype. Nomen dubium_sentence_9

In bacteriology Nomen dubium_section_1

In bacteriological nomenclature, nomina dubia may be placed on the list of rejected names by the Judicial Commission. Nomen dubium_sentence_10

The meaning of these names is uncertain. Nomen dubium_sentence_11

Other categories of names that may be treated in this way (rule 56a) are: Nomen dubium_sentence_12

Nomen dubium_unordered_list_0

  • ambiguous names, nomina ambigua, have been used with more than one meaningNomen dubium_item_0_0
  • names causing confusion, nomina confusa, are based on a mixed cultureNomen dubium_item_0_1
  • perplexing names, nomina perplexa, confusingly similar namesNomen dubium_item_0_2
  • perilous names, nomina periculosa, names that may lead to accidents endangering life or health or with potential serious economic consequencesNomen dubium_item_0_3

In other domains Nomen dubium_section_2

In botanical nomenclature the phrase nomen dubium has no status, although it is informally used for names whose application has become confusing. Nomen dubium_sentence_13

In this regard however, its synonym nomen ambiguum is of more frequent use. Nomen dubium_sentence_14

In botany, such names may be proposed for rejection. Nomen dubium_sentence_15

See also Nomen dubium_section_3

Nomen dubium_unordered_list_1

Credits to the contents of this page go to the authors of the corresponding Wikipedia page: dubium.