Proposing a subgenus Borreliella

In 2014, it was proposed (validly published in 2015) that the genus Borrelia be divided into two genera, with a new genus Borreliella holding species of the Lyme borreliosis group of spirochetes and the genus Borrelia retaining all other species. As borrelias are medically important bacteria and as...

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Main Authors: Gabriele Margos, Brian Stevenson, Richard Birtles, Alexander Gofton, Emilie Talagrand-Reboul, Markus Goeker, Volker Fingerle
Format: Article
Language:English
Published: Elsevier 2025-09-01
Series:Ticks and Tick-Borne Diseases
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Online Access:http://www.sciencedirect.com/science/article/pii/S1877959X25001001
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author Gabriele Margos
Brian Stevenson
Richard Birtles
Alexander Gofton
Emilie Talagrand-Reboul
Markus Goeker
Volker Fingerle
author_facet Gabriele Margos
Brian Stevenson
Richard Birtles
Alexander Gofton
Emilie Talagrand-Reboul
Markus Goeker
Volker Fingerle
author_sort Gabriele Margos
collection DOAJ
description In 2014, it was proposed (validly published in 2015) that the genus Borrelia be divided into two genera, with a new genus Borreliella holding species of the Lyme borreliosis group of spirochetes and the genus Borrelia retaining all other species. As borrelias are medically important bacteria and as concerns about this taxonomic proposal were raised, this genus split was controversial. In particular, the accuracy of the genetic signatures used to support the division of the genus has been questioned, particularly as new taxa have markedly increased the diversity of the genus in recent years. Restoration of the genus Borrelia to its original form was therefore proposed as an emendation in 2018.However, some databases adhere to the policy of using the last validly published name of a genus as the correct name and, hence, fail to recognize a reversion to a previous taxonomy and to previously validly published names (homotypic synonyms). We therefore propose to lower the genus Borreliella in rank to a subgenus. This will create a validly published name newer than the genus name Borreliella that can then be used by databases and provides a means of formally referring to the same group without implying necessary changes of species names. Applying the underused subgenus category instead of splitting an already monophyletic genus into several genera could be a preferable solution for other bacterial groups, too.
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spelling doaj-art-7e389e049bfb444fafcd3a42c8f2bd6d2025-08-20T03:41:43ZengElsevierTicks and Tick-Borne Diseases1877-96032025-09-0116510253610.1016/j.ttbdis.2025.102536Proposing a subgenus BorreliellaGabriele Margos0Brian Stevenson1Richard Birtles2Alexander Gofton3Emilie Talagrand-Reboul4Markus Goeker5Volker Fingerle6German National Reference Center for Borrelia, Bavarian Health and Food Safety Authority, Oberschleissheim, GermanyUniversity of Kentucky, Department of Microbiology, Immunology, and Molecular Genetics, and Department of Entomology, Lexington, USAUniversity of Salford, School of Science, Engineering and Environment, Salford, UKCSIRO Health and Biosecurity, Brisbane, AustraliaUniversity of Strasbourg, UR3073, University Hospital of Strasbourg, French National Reference Center for Borrelia, Strasbourg, FranceLeibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstrasse 7B, D-38124 Braunschweig, GermanyGerman National Reference Center for Borrelia, Bavarian Health and Food Safety Authority, Oberschleissheim, Germany; Corresponding author.In 2014, it was proposed (validly published in 2015) that the genus Borrelia be divided into two genera, with a new genus Borreliella holding species of the Lyme borreliosis group of spirochetes and the genus Borrelia retaining all other species. As borrelias are medically important bacteria and as concerns about this taxonomic proposal were raised, this genus split was controversial. In particular, the accuracy of the genetic signatures used to support the division of the genus has been questioned, particularly as new taxa have markedly increased the diversity of the genus in recent years. Restoration of the genus Borrelia to its original form was therefore proposed as an emendation in 2018.However, some databases adhere to the policy of using the last validly published name of a genus as the correct name and, hence, fail to recognize a reversion to a previous taxonomy and to previously validly published names (homotypic synonyms). We therefore propose to lower the genus Borreliella in rank to a subgenus. This will create a validly published name newer than the genus name Borreliella that can then be used by databases and provides a means of formally referring to the same group without implying necessary changes of species names. Applying the underused subgenus category instead of splitting an already monophyletic genus into several genera could be a preferable solution for other bacterial groups, too.http://www.sciencedirect.com/science/article/pii/S1877959X25001001TaxonomyBorreliaBorreliellaSubgenusClassification
spellingShingle Gabriele Margos
Brian Stevenson
Richard Birtles
Alexander Gofton
Emilie Talagrand-Reboul
Markus Goeker
Volker Fingerle
Proposing a subgenus Borreliella
Ticks and Tick-Borne Diseases
Taxonomy
Borrelia
Borreliella
Subgenus
Classification
title Proposing a subgenus Borreliella
title_full Proposing a subgenus Borreliella
title_fullStr Proposing a subgenus Borreliella
title_full_unstemmed Proposing a subgenus Borreliella
title_short Proposing a subgenus Borreliella
title_sort proposing a subgenus borreliella
topic Taxonomy
Borrelia
Borreliella
Subgenus
Classification
url http://www.sciencedirect.com/science/article/pii/S1877959X25001001
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