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Article

Integrated Taxonomy for Halistemma Species from the Northwest Pacific Ocean

1
Department of Life Science, Hanyang University, Seoul 04763, Korea
2
Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
*
Authors to whom correspondence should be addressed.
Water 2020, 12(11), 3283; https://doi.org/10.3390/w12113283
Received: 16 October 2020 / Revised: 20 November 2020 / Accepted: 20 November 2020 / Published: 22 November 2020
(This article belongs to the Special Issue Species Richness and Diversity of Aquatic Ecosystems)
During a survey of the siphonophore community in the Kuroshio Extension, Northwest Pacific Ocean, a new Halistemma Huxley, 1859 was described using integrated molecular and morphological approaches. The Halistemma isabu sp. nov. nectophore is most closely related morphologically to H. striata Totton, 1965 and H. maculatum Pugh and Baxter, 2014. These species can be differentiated by their nectosac shape, thrust block size, ectodermal cell patches and ridge patterns. The new species’ bracts are divided into two distinct types according to the number of teeth. Type A bracts are more closely related to ventral bracts in H. foliacea (Quoy and Gaimard, 1833) while Type B bracts are more similar to H. rubrum (Vogt, 1852). Each type differs, however, from the proximal end shape, distal process and bracteal canal. Both of the new species’ morphological type and phylogenetic position within the genus Halistemma are supported by phylogenetic analysis of concatenated DNA dataset (mtCOI, 16S rRNA and 18S rRNA). Integrated morphological and molecular approaches to the taxonomy of siphonophores showed a clear delimitation of the new species from the congeners. Halistemma isabu sp. nov. is distributed with the congeners H. rubrum, H. cupulifera, H. foliacea and H. striata in the northwestern Pacific Ocean. View Full-Text
Keywords: zooplankton; jellyfish; mitochondria; systematics; hydrozoa zooplankton; jellyfish; mitochondria; systematics; hydrozoa
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MDPI and ACS Style

Park, N.; Prudkovsky, A.A.; Lee, W. Integrated Taxonomy for Halistemma Species from the Northwest Pacific Ocean. Water 2020, 12, 3283. https://doi.org/10.3390/w12113283

AMA Style

Park N, Prudkovsky AA, Lee W. Integrated Taxonomy for Halistemma Species from the Northwest Pacific Ocean. Water. 2020; 12(11):3283. https://doi.org/10.3390/w12113283

Chicago/Turabian Style

Park, Nayeon; Prudkovsky, Andrey A.; Lee, Wonchoel. 2020. "Integrated Taxonomy for Halistemma Species from the Northwest Pacific Ocean" Water 12, no. 11: 3283. https://doi.org/10.3390/w12113283

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