"nomen dubium" meaning in Translingual

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      "expansion": "Latin nomen (“name”)",
      "name": "der"
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  "etymology_text": "From Latin nomen (“name”) + dubium (“dubious”).",
  "forms": [
    {
      "form": "nomina dubia",
      "tags": [
        "plural"
      ]
    }
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      "expansion": "nomen dubium (plural nomina dubia)",
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  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "noun",
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          "ref": "1999, Ulrich Schmid, “Syrphus obscuripes Strobl, 1910: ein älteres Synonym von Epistrophe similis Doczkal & Schmid, 1994 (Diptera, Syrphidae)”, in Volucella, volume 4 (in German), pages 103–104:",
          "text": "Da der Typus von obscuripes trotz zweimaliger Nachsuche nicht aufzufinden war, mussten wir obscuripes als nomen dubium betrach­ten.",
          "type": "quote"
        },
        {
          "ref": "2003, O. A. Sӕther, L. C. Ferrington Jr., “Nomenclature notes on some orthoclads (Diptera: Chironomidae)”, in Zootaxa, volume 322 (in English), pages 1–7:",
          "text": "Camptocladius hexalobus Kieffer, 1924: 395 (= Pseudosmittia hexalobus Kieffer, nomen dubium). Type lost. A likely senior synonym of either P. trilobata or P. obtusa.",
          "type": "quote"
        }
      ],
      "glosses": [
        "In zoological nomenclature, a name that is not described clearly enough to recognize, generally when a type specimen can not be examined or lacks essential diagnostic characters."
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        "(taxonomy) In zoological nomenclature, a name that is not described clearly enough to recognize, generally when a type specimen can not be examined or lacks essential diagnostic characters."
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      "related": [
        {
          "word": "nomen novum"
        },
        {
          "word": "nomen oblitum"
        }
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  "word": "nomen dubium"
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      "name": "der"
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  "etymology_text": "From Latin nomen (“name”) + dubium (“dubious”).",
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    {
      "form": "nomina dubia",
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        "plural"
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    }
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  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "noun",
  "related": [
    {
      "word": "nomen novum"
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      "word": "nomen oblitum"
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          "text": "Da der Typus von obscuripes trotz zweimaliger Nachsuche nicht aufzufinden war, mussten wir obscuripes als nomen dubium betrach­ten.",
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        {
          "ref": "2003, O. A. Sӕther, L. C. Ferrington Jr., “Nomenclature notes on some orthoclads (Diptera: Chironomidae)”, in Zootaxa, volume 322 (in English), pages 1–7:",
          "text": "Camptocladius hexalobus Kieffer, 1924: 395 (= Pseudosmittia hexalobus Kieffer, nomen dubium). Type lost. A likely senior synonym of either P. trilobata or P. obtusa.",
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  "word": "nomen dubium"
}