Nomen oblitum

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A nomen oblitum (plural: nomina oblita; Latin for "forgotten name") is a technical term, used in zoological nomenclature, for a particular kind of disused scientific name. Nomen oblitum_sentence_0

In its present meaning, the nomen oblitum came into being with the fourth, 1999, edition of the International Code of Zoological Nomenclature. Nomen oblitum_sentence_1

After 1 January 2000, a scientific name may be formally declared to be a nomen oblitum when it has been shown not to have been used as a valid name within the scientific community since 1899, and when it is either a senior synonym (there is also a more recent name which applies to the same taxon, and which is in common use) or a homonym (it is spelled the same as another name, which is in common use), and when the preferred junior synonym or homonym has been shown to be in wide use in 50 or more publications in the past few decades. Nomen oblitum_sentence_2

Once a name has formally been declared to be a nomen oblitum, the disused name is to be 'forgotten'. Nomen oblitum_sentence_3

By the same act, the next available name must be declared to be a nomen protectum; from then on, it takes precedence. Nomen oblitum_sentence_4

An example is the case of the scientific name for the leopard shark. Nomen oblitum_sentence_5

Despite the name Mustelus felis being the senior synonym, an error in recording the dates of publication resulted in the widespread use of Triakis semifasciata as the leopard shark's scientific name. Nomen oblitum_sentence_6

After this long-standing error was discovered, T. semifasciata was made the valid name (as a nomen protectum) and Mustelis felis was declared invalid (as a nomen oblitum). Nomen oblitum_sentence_7

Use in taxonomy Nomen oblitum_section_0

The designation nomen oblitum has been used relatively frequently to keep the priority of old, sometimes disused names, and, controversially, often without establishing that a name actually meets the criteria for the designation. Nomen oblitum_sentence_8

Some taxonomists have regarded the failure to properly establish the nomen oblitum designation as a way to avoid doing taxonomic research or to retain a preferred name regardless of priority. Nomen oblitum_sentence_9

When discussing the taxonomy of North American birds, Rea (1983) stated that "...Swainson's [older but disused] name must stand unless it can be demonstrated conclusively to be a nomen oblitum (a game some taxonomists play to avoid their supposed fundamental principle, priority)." Nomen oblitum_sentence_10

Banks and Browning (1995) responded directly to Rea's strict application of ICZN rules for determining nomina oblita, stating: "We believe that the fundamental obligation of taxonomists is to promote stability, and that the principle of priority is but one way in which this can be effected. Nomen oblitum_sentence_11

We see no stability in resurrecting a name of uncertain basis that has been used in several different ways to replace a name that has been used uniformly for most of a century." Nomen oblitum_sentence_12

See also Nomen oblitum_section_1

Nomen oblitum_unordered_list_0

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