An unexpected journey – the arctic deep-sea halicreatid trachymedusa Botrynema brucei ellinorae off Florida: a reassessment under an integrative taxonomic approach

Montenegro, Javier; Kolbusz, Jessica; Niyazi, Yakufu; Soto-Angel, Joan J.; Hosia, Aino; Collins, Allen G.; Jamieson, Alan J.; Lindsay, Dhugal J.

doi:10.1016/j.dsr.2025.104551

i

An unexpected journey – the arctic deep-sea halicreatid trachymedusa Botrynema brucei ellinorae off Florida: a reassessment under an integrative taxonomic approach

2025
By Montenegro, Javier ; Kolbusz, Jessica ; Niyazi, Yakufu ; ...

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Journal Title:

Deep Sea Research Part I: Oceanographic Research Papers
Personal Author:

Montenegro, Javier ; Kolbusz, Jessica ; Niyazi, Yakufu ; Soto-Angel, Joan J. ; Hosia, Aino ; Collins, Allen G. ; Jamieson, Alan J. ; Lindsay, Dhugal J.
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; NEFSC (Northeast Fisheries Science Center) ; OST (Office of Science and Technology) ; Ocean Exploration Program ; OAR (Oceanic and Atmospheric Research)
Description:

The study of the trachymedusa Botrynema has a long history of research, encompassing over 120 years of exploration in the deep sea. Two distinct morphotypes are recognized within Botrynema: one with a characteristic apical knob and another without it. Both morphotypes are present in the subspecies B. brucei ellinorae, while only specimens with a knob are known for the remainder of B. brucei. Specimens with a knob have been reported across all oceans and latitudes, whereas specimens without a knob are only known from Arctic and Subarctic regions. In this study, we use historical records, molecular tools and phylogenetic analyses to challenge the widely accepted notion of a cosmopolitan distribution for B. brucei as traditionally understood. We propose a range expansion to the subtropical western Atlantic Ocean for B. brucei ellinorae based on molecular data and hypothesize the existence of a mesopelagic soft barrier in the North Atlantic region as a plausible explanation to emerging biogeographical patterns revealed in this study.
Keywords:

Apical Knob Botrynema Mesopelagic Barrier Phylogeography
Source:

Deep Sea Research Part I: Oceanographic Research Papers, 223, 104551
DOI:

https://doi.org/10.1016/j.dsr.2025.104551
ISSN:

0967-0637
Format:

PDF
Publisher:

Elsevier BV
Document Type:

Journal Article
Funding:

Grant no. NA15OAR0110209
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

urn:sha-512:a5daeb8fd2e8659fc072c9108772e37d87714e69ee4270ff78e61a7319549fda179859ba10c8238ec6257535b97e7c0f34252a80a038fb0fc689a0f66bde3bf5
Download URL:

https://repository.library.noaa.gov/view/noaa/71041/noaa_71041_DS1.pdf
File Type:

[PDF - 9.35 MB ]

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