A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods

The deep sea is the largest biome on Earth and hosts the majority of as yet undescribed species; description of these may trigger a new mindset about evolution and function of characters. We describe and diagnose a new genus and species <i>Sclerodora crosnieri</i> sp. nov. belonging to t...

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Autores principales:	Alexander Vereshchaka, Dmitry Kulagin, Anastasiia Lunina
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Caridea phylogeny morphology new taxon Oplophoroidea Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/ef57c71365b74e93bd2f3c7dbc662a3a
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spelling	oai:doaj.org-article:ef57c71365b74e93bd2f3c7dbc662a3a2021-11-25T17:22:28ZA New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods10.3390/d131105361424-2818https://doaj.org/article/ef57c71365b74e93bd2f3c7dbc662a3a2021-10-01T00:00:00Zhttps://www.mdpi.com/1424-2818/13/11/536https://doaj.org/toc/1424-2818The deep sea is the largest biome on Earth and hosts the majority of as yet undescribed species; description of these may trigger a new mindset about evolution and function of characters. We describe and diagnose a new genus and species <i>Sclerodora crosnieri</i> sp. nov. belonging to the superfamily Oplophoroidea. We examined and coded 81 characters for morphological analyses and used four gene markers for molecular analyses involving the new taxon and representatives of all other genera of Oplophoroidea. Retrieved morphological and molecular trees were similar and suggested that the new genus is a sister group to <i>Hymenodora</i> and both form a clade sister to the rest of Acanthephyridae. We provide an amended key to all genera of Oplophoroidea. We found an unusual chelate structure on the dactyl of the fifth pereopod, tested and confirmed a hypothesis that this structure is common for the whole family Acanthephyridae. We suggest that this derived structure is linked to an active cleaning of branchia—a function associated with chelipeds in some other carid shrimps. Convergent chelate structures are likely efficient for cleaning branchia, whichever appendage is adapted for these functions. In Oplophoridae (sister to Acanthephyridae), cleaning function is carried out by well-developed epipods.Alexander VereshchakaDmitry KulaginAnastasiia LuninaMDPI AGarticleCarideaphylogenymorphologynew taxonOplophoroideaBiology (General)QH301-705.5ENDiversity, Vol 13, Iss 536, p 536 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Caridea phylogeny morphology new taxon Oplophoroidea Biology (General) QH301-705.5
spellingShingle	Caridea phylogeny morphology new taxon Oplophoroidea Biology (General) QH301-705.5 Alexander Vereshchaka Dmitry Kulagin Anastasiia Lunina A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods
description	The deep sea is the largest biome on Earth and hosts the majority of as yet undescribed species; description of these may trigger a new mindset about evolution and function of characters. We describe and diagnose a new genus and species <i>Sclerodora crosnieri</i> sp. nov. belonging to the superfamily Oplophoroidea. We examined and coded 81 characters for morphological analyses and used four gene markers for molecular analyses involving the new taxon and representatives of all other genera of Oplophoroidea. Retrieved morphological and molecular trees were similar and suggested that the new genus is a sister group to <i>Hymenodora</i> and both form a clade sister to the rest of Acanthephyridae. We provide an amended key to all genera of Oplophoroidea. We found an unusual chelate structure on the dactyl of the fifth pereopod, tested and confirmed a hypothesis that this structure is common for the whole family Acanthephyridae. We suggest that this derived structure is linked to an active cleaning of branchia—a function associated with chelipeds in some other carid shrimps. Convergent chelate structures are likely efficient for cleaning branchia, whichever appendage is adapted for these functions. In Oplophoridae (sister to Acanthephyridae), cleaning function is carried out by well-developed epipods.
format	article
author	Alexander Vereshchaka Dmitry Kulagin Anastasiia Lunina
author_facet	Alexander Vereshchaka Dmitry Kulagin Anastasiia Lunina
author_sort	Alexander Vereshchaka
title	A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods
title_short	A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods
title_full	A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods
title_fullStr	A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods
title_full_unstemmed	A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods
title_sort	new shrimp genus (crustacea: decapoda) from the deep atlantic and an unusual cleaning mechanism of pelagic decapods
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ef57c71365b74e93bd2f3c7dbc662a3a
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A New Shrimp Genus (Crustacea: Decapoda) from the Deep Atlantic and an Unusual Cleaning Mechanism of Pelagic Decapods

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