Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)

Introduction Botrynema, a genus of medusozoans in the trachyline family Halicreatidae, currently contains two species: B. brucei and B. ellinorae , distinguished by the presence or absence, respectively, of an apical knob as a diagnostic character. However, no study has corroborated if these taxonom...

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Published in:Frontiers in Marine Science
Main Authors: Montenegro, Javier, Collins, Allen G., Hopcroft, Russell R., Questel, Jennifer M., Thuesen, Erik V., Bachtel, Tiffany S., Bergman, Leah A., Sangekar, Mehul N., Drazen, Jeffrey C., Lindsay, Dhugal J.
Other Authors: Japan Society for the Promotion of Science, Ministry of Education, Culture, Sports, Science and Technology, NOAA Ocean Exploration
Format: Article in Journal/Newspaper
Language:unknown
Published: Frontiers Media SA 2023
Subjects:
Online Access:http://dx.doi.org/10.3389/fmars.2022.1101699
https://www.frontiersin.org/articles/10.3389/fmars.2022.1101699/full
id crfrontiers:10.3389/fmars.2022.1101699
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spelling crfrontiers:10.3389/fmars.2022.1101699 2024-05-12T07:59:43+00:00 Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae) Montenegro, Javier Collins, Allen G. Hopcroft, Russell R. Questel, Jennifer M. Thuesen, Erik V. Bachtel, Tiffany S. Bergman, Leah A. Sangekar, Mehul N. Drazen, Jeffrey C. Lindsay, Dhugal J. Japan Society for the Promotion of Science Ministry of Education, Culture, Sports, Science and Technology NOAA Ocean Exploration 2023 http://dx.doi.org/10.3389/fmars.2022.1101699 https://www.frontiersin.org/articles/10.3389/fmars.2022.1101699/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 9 ISSN 2296-7745 Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography journal-article 2023 crfrontiers https://doi.org/10.3389/fmars.2022.1101699 2024-04-18T07:57:50Z Introduction Botrynema, a genus of medusozoans in the trachyline family Halicreatidae, currently contains two species: B. brucei and B. ellinorae , distinguished by the presence or absence, respectively, of an apical knob as a diagnostic character. However, no study has corroborated if these taxonomic diagnoses have a biological and evolutionary basis. Therefore, in this study we attempted to address the question “do the two nominal species in the genus Botrynema represent independent phylogenetic lineages, or two phenotypic variants of a single species? Methods In this study we took advantage of legacy collections from different research expeditions across the globe from 2000 to 2021 to study the phylogenetics and taxonomy of the genus Botrynema. Results B. brucei and B. ellinorae present partially overlapping vertical distributions in the Arctic and as a whole in the Arctic the genus seems to be limited to the Atlantic water masses. The phylogenetic reconstruction based on the concatenated alignment corroborates the validity of the family Halicreatidae and of genus Botrynema as monophyletic groups. However no clear differentiation was found between the two presently accepted species, B. ellinorae and B. brucei . Discussion Based on the evidence we gathered, we conclude that while the genus Botrynema does contain at least two species lineages, these lineages are not concordant with current species definitions. The species B. ellinorae is reassigned as a subspecies of B. brucei and diagnostic characters are provided. Article in Journal/Newspaper Arctic Frontiers (Publisher) Arctic Frontiers in Marine Science 9
institution Open Polar
collection Frontiers (Publisher)
op_collection_id crfrontiers
language unknown
topic Ocean Engineering
Water Science and Technology
Aquatic Science
Global and Planetary Change
Oceanography
spellingShingle Ocean Engineering
Water Science and Technology
Aquatic Science
Global and Planetary Change
Oceanography
Montenegro, Javier
Collins, Allen G.
Hopcroft, Russell R.
Questel, Jennifer M.
Thuesen, Erik V.
Bachtel, Tiffany S.
Bergman, Leah A.
Sangekar, Mehul N.
Drazen, Jeffrey C.
Lindsay, Dhugal J.
Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)
topic_facet Ocean Engineering
Water Science and Technology
Aquatic Science
Global and Planetary Change
Oceanography
description Introduction Botrynema, a genus of medusozoans in the trachyline family Halicreatidae, currently contains two species: B. brucei and B. ellinorae , distinguished by the presence or absence, respectively, of an apical knob as a diagnostic character. However, no study has corroborated if these taxonomic diagnoses have a biological and evolutionary basis. Therefore, in this study we attempted to address the question “do the two nominal species in the genus Botrynema represent independent phylogenetic lineages, or two phenotypic variants of a single species? Methods In this study we took advantage of legacy collections from different research expeditions across the globe from 2000 to 2021 to study the phylogenetics and taxonomy of the genus Botrynema. Results B. brucei and B. ellinorae present partially overlapping vertical distributions in the Arctic and as a whole in the Arctic the genus seems to be limited to the Atlantic water masses. The phylogenetic reconstruction based on the concatenated alignment corroborates the validity of the family Halicreatidae and of genus Botrynema as monophyletic groups. However no clear differentiation was found between the two presently accepted species, B. ellinorae and B. brucei . Discussion Based on the evidence we gathered, we conclude that while the genus Botrynema does contain at least two species lineages, these lineages are not concordant with current species definitions. The species B. ellinorae is reassigned as a subspecies of B. brucei and diagnostic characters are provided.
author2 Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
NOAA Ocean Exploration
format Article in Journal/Newspaper
author Montenegro, Javier
Collins, Allen G.
Hopcroft, Russell R.
Questel, Jennifer M.
Thuesen, Erik V.
Bachtel, Tiffany S.
Bergman, Leah A.
Sangekar, Mehul N.
Drazen, Jeffrey C.
Lindsay, Dhugal J.
author_facet Montenegro, Javier
Collins, Allen G.
Hopcroft, Russell R.
Questel, Jennifer M.
Thuesen, Erik V.
Bachtel, Tiffany S.
Bergman, Leah A.
Sangekar, Mehul N.
Drazen, Jeffrey C.
Lindsay, Dhugal J.
author_sort Montenegro, Javier
title Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)
title_short Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)
title_full Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)
title_fullStr Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)
title_full_unstemmed Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)
title_sort heterogeneity in diagnostic characters across ecoregions: a case study with botrynema (hydrozoa: trachylina: halicreatidae)
publisher Frontiers Media SA
publishDate 2023
url http://dx.doi.org/10.3389/fmars.2022.1101699
https://www.frontiersin.org/articles/10.3389/fmars.2022.1101699/full
geographic Arctic
geographic_facet Arctic
genre Arctic
genre_facet Arctic
op_source Frontiers in Marine Science
volume 9
ISSN 2296-7745
op_rights https://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.3389/fmars.2022.1101699
container_title Frontiers in Marine Science
container_volume 9
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