Pseudotanaidae Sieg, 1976 (Crustacea: Peracarida) from the Southern Ocean: diversity and bathymetric pattern

Błażewicz, Magdalena; Jakiel, Aleksandra; Bamber, Roger N.; Bird, Graham J.

doi:10.1080/24750263.2021.1960444

Cited by 4 publications

(5 citation statements)

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“…Later classification of the Paratanaoidea and the definitions of the newly established families were less obvious and required use of morphometry, dissection of the mouthparts and having of at least basic experience in tanaidacean taxonomy to capture specific and often fine details in morphological structures. The definition of more recently erected families based on character of pereopod setation (Jóźwiak et al, 2009;Błażewicz et al, 2019), proportion of the uropods rami (Larsen and Wilson, 2002;Bird and Larsen, 2009;Błażewicz-Paszkowycz and Bamber, 2009) or shape of the sclerite that links the cheliped with cephalothorax (Błażewicz et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…From each group several individuals were designated for thorough morphological analysis and dissected with chemically sharpened tungsten needles. The dissected cephalothorax, pereon, and pleon appendages were mounted on slides using glycerin and sealed with molten paraffin (Błażewicz et al, 2021). Morphological drawings were prepared using a light microscope (Nikon Eclipse 50i) equipped with a camera lucida.…”

Section: Morphological Analysesmentioning

confidence: 99%

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A Hidden Diversity in the Atlantic and the SE Pacific: Hamatipedidae n. fam. (Crustacea: Tanaidacea)

Gellert

Bird²,

Stępień

et al. 2022

Front. Mar. Sci.

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A new family of paratanaoidean Tanaidacea, the hamatipedids, formerly part of the Typhlotanaidae, is established to accommodate three genera (Hamatipeda and two new). Deep-sea hamatipedids collected from four sites in the Atlantic (Argentine and Guiana basins) and 14 sites from the Southeast coast of Australia were studied using a taxonomic approach combining morphological and morphometric data. Four new species of Hamatipeda and one of a new genus are described from different deep-sea areas of the Atlantic and Pacific oceans. Hamatipeda sima originally classified within Hamatipeda, is transferred to a new genus. We observed that several morphometric characters (i.e., length of the last two pereonites) in different life-stages of one of the new Hamatipeda species (neuter, manca-2, and manca-3) are correlated with the total body length (TBL). Applying a morphometric approach, we aimed: (1) to identify those ontogenetic-dependent characters, and (2) to detect the characters, which can be used in discrimination of Hamatipedidae species, regardless their life-stage.

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Section: Discussionmentioning

confidence: 99%

Section: Morphological Analysesmentioning

confidence: 99%

A Hidden Diversity in the Atlantic and the SE Pacific: Hamatipedidae n. fam. (Crustacea: Tanaidacea)

Gellert

Bird²,

Stępień

et al. 2022

Front. Mar. Sci.

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show abstract

“…From each group, several individuals were designated for thorough morphological analysis and dissected with chemically sharpened tungsten needles. The dissected cephalothorax, pereon, and pleon appendages were mounted on slides using glycerine and sealed with molten paraffin 111 . Morphological drawings were prepared using a light microscope (Nikon Eclipse 50i) equipped with a camera lucida.…”

Section: Methodsmentioning

confidence: 99%

Diversity under a magnifier lens: the case of Typhlotanaidae (Crustacea: Tanaidacea) in the N Atlantic

Gellert

Błażewicz

Mamos

et al. 2023

Sci Rep

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Research focusing on ‘stout-bodied’ typhlotanaids collected from several sites around Iceland and adjacent N Atlantic region has resulted in the description of 15 species new to science, as well as the creation of eight new genera. Typhlotanais eximius Hansen, 1913 is redescribed and transferred to a new genus, while Typhlotanais crassus and Peraeospinosus adipatus are transferred to the genus Larsenotanais. The morphological and the molecular data were combined to consolidate and confirm the validity of the results obtained from both approaches. The polyphyletic nature of the Typhlotanaidae and its serious of its taxonomic diversity are emphasized, although molecular analysis reveals that the ‘stout-bodied’ Typhlotanaidae form monophyletic clade. Depth and temperature are identified as the main environmental parameters determining the distribution of this group of Typhlotanaidae. Several species are clearly associated with the shelf and upper bathyal of Iceland. The Greenland-Iceland-Faroe Ridge is shown to be a distinct zoogeographical barrier for typhlotanaids inhabiting the deeper slope and abyssal regions around Iceland.

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“…Chemically sharpened tungsten needles were used for the dissection of the individuals selected for detailed morphological analyses. The dissected appendages were placed on a microscope slide on a drop of glycerine, protected with a cover glass, and sealed with a ring of melted paraffin (Błażewicz et al, 2021). Drawings were prepared using a light microscope (Nikon Eclipse 50i, Japan) equipped with a camera lucida.…”

Section: Species Descriptionmentioning

confidence: 99%

Diversity of Pacific Agathotanais (Peracarida: Tanaidacea)

et al. 2022

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Agathotanais is one of the seven genera classified into the family Agathotanaidae. So far, 12 species have been described for the genus, seven of which are known from the Pacific. However, considering the present poor state of knowledge on deep-sea environments, a much higher number of Agathotanais species than currently known can be suspected. Among the studied material, collected from below 1,000 m during five deep-sea expeditions in different parts of the Pacific Ocean, we identified eight species: two of them were already known to the science and five species were identified as new to knowledge and their formal description is presented in the paper: two from the North West Pacific (the Sea of Okhotsk and Kuril-Kamchatka Trench), two from the Central Pacific (Clarion-Clipperton Fracture Zone), and one from the Australian slope. The eighth Agathotanais species in our material was determined using a molecular approach, but it was represented by only one partially destroyed individual and could therefore not be formally described. The proportion of Agathotanais collected at the Sea of Okhotsk was the highest (22%), whereas the numbers were substantially lower for the Kuril-Kamchatka Trench, and the Central and the Southern Pacific. Molecular analyses confirmed the monophyly of Agathotanais and Paragathotanais and a close relationship between both genera. Moreover, a close relationship between the two Australian species was revealed. As a result of our findings, the number of species known from the Pacific increased from 5 to 11, with the total number of species in this genus increasing from 12 to 17. An updated identification key for Agathotanais species is given.

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Pseudotanaidae Sieg, 1976 (Crustacea: Peracarida) from the Southern Ocean: diversity and bathymetric pattern

Cited by 4 publications

References 61 publications

A Hidden Diversity in the Atlantic and the SE Pacific: Hamatipedidae n. fam. (Crustacea: Tanaidacea)

A Hidden Diversity in the Atlantic and the SE Pacific: Hamatipedidae n. fam. (Crustacea: Tanaidacea)

Diversity under a magnifier lens: the case of Typhlotanaidae (Crustacea: Tanaidacea) in the N Atlantic

Diversity of Pacific Agathotanais (Peracarida: Tanaidacea)

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