Chapter 8: Family-group Nominal Taxa and their Names


Article 39. Invalidity due to homonymy or suppression of the name of the type genus. The name of a family-group taxon is invalid if the name of its type genus is a junior homonym or has been totally or partially suppressed (see Articles 81.2.1 and 81.2.2) by the Commission. If that family-group name is in use it must be replaced either by the next oldest available name from among its synonyms [Art. 23.3.5], including the names of its subordinate family-group taxa, or, if there is no such synonym, by a new name based on the valid name (whether a synonym or a new replacement name (nomen novum)) of the former type genus.

Example. In the Collembola the family name DEGEERIIDAE Lubbock, 1873 was based on Degeeria Nicolet, 1842, a junior homonym of Degeeria Meigen, 1838 in Diptera. DEGEERIIDAE had no synonyms and a new name (nom. nov.) ENTOMOBRYIDAE Tömösváry, 1882 was based upon Entomobrya Rondani, 1861, a new replacement name (nomen novum) for Degeeria Nicolet.


Preamble | Articles 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | Glossary Appendices Constitution


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