Recolonisation of Artificial Sediments in the Deep Bay of Biscay By Tanaidaceans (Crustacea: Peracarida), With a Description of a New Species of <i>Pseudotanais</i>

Bird, Graham J.; Holdich, D. M.

doi:10.1017/s0025315400029428

Cited by 12 publications

(23 citation statements)

References 18 publications

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“…In a series of papers describing results of BIOGAS, GASCOR, and EPI VI programmes, Bird andHoldich (1985, 1989a, b) highlighted the high biodiversity of pseudotanaids in the depth range of 1100-4800 m in the North Atlantic, mainly west of Great Britain and in the Bay of Biscay. They erected two new genera-Mystriocentrus Bird and Holdich, 1989a and Parapseudotanais Bird and Holdich, 1989b, and described eleven species, namely Mystriocentrus serratus Bird and Holdich, 1989a; Parapseudotanais abyssalis Bird and Holdich, 1989b; Pseudotanais (P.) corollatus Bird and Holdich, 1989a; colonus Bird and Holdich, 1989b; P. (P) denticulatus Bird and Holdich, 1989a; P. (P.) falcicula Bird and Holdich, 1989b; P. (P) longispinus Bird and Holdich, 1989a; P. (P.) scalpellum Bird and Holdich, 1989b; P. (P.) spatula Bird and Holdich, 1989a; P. (P.) spicatus Bird and Holdich, 1989b; vulsella Bird and Holdich, 1989a. Finally, one more species, P. (P.) falcifer Błażewicz-Paszkowycz and Bamber, 2011 from a mud volcano off Norway, was added to the list (Błażewicz-Paszkowycz and Bamber 2011).…”

Section: Introductionmentioning

confidence: 99%

A tip of the iceberg—Pseudotanaidae (Tanaidacea) diversity in the North Atlantic

2018

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During two IceAGE expeditions, a large collection of Tanaidacea was gathered from the shelf down to the slope (213−2750 m) in six areas off Iceland-the Irminger Basin, the Iceland Basin, the Norwegian Sea, the Denmark Strait, the Iceland-Faroe Ridge, and the Norwegian Channel. In this collection, members of the family Pseudotanaidae were most numerous component. We examined 40 samples collected with different gears (e.g., EBS, VVG. GKG), in which 323 pseudotanaid individuals were counted and covered a total depth from 213.9 to 2746.4 m. Morphological identification of the material has revealed the presence of five species: Akanthinotanais cf. longipes, Mystriocentrus biho sp. n. Pseudotanais misericorde sp. n., P. svavarssoni sp. n., and P. sigrunis sp. n. The description of the four new species has been presented in the paper and a rank of the subgenus Akanthinotanais is elevated to a genus rank. A large group of morphologically almost identical specimens, similar with P. svavarssoni sp. n. from a wide depth range and from various areas off Iceland was discriminated to species by applying morphometric methods; one distinct species (P. svavarssoni sp. n.) and complex of presumably cryptic species the species was discovered. Based on current data and literature records, similarity among fauna of Pseudotanaidae was assessed with applying Bray-Curtis formula. As results, potential zoogeographic regions in the North Atlantic have been distinguished.

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Section: Introductionmentioning

confidence: 99%

A tip of the iceberg—Pseudotanaidae (Tanaidacea) diversity in the North Atlantic

2018

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“…Some authors have recorded the swimming males as unidentified taxa (Bird and Holdich 1989), while others tried to pair males and females, but those decisions were purely intuitional (see Table 1 and references therein). Even so, in many species or genera of Tanaidacea males have never been discovered or proven to exist.…”

Section: Introductionmentioning

confidence: 99%

Discovery of Swimming Males of Paratanaoidea (Tanaidacea)

Błażewicz¹,

Jennings²,

Jeskulke³

et al. 2014

Polish Polar Research

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Abstract:In Tanaidacea morphological identification of male individuals to the species level is complicated by two factors: the presence of multiple male stages/instars confuse the assessment of sexual stage while strong sexual dimorphism within several families ob− scures the morphological affinities of undescribed males to described females. Males of Paratanaoidea are often morphologically quite different from females and have not been discovered for most genera so far, which has led to the assumption that some tanaidaceans might have parthenogenetic reproduction or simply have undeveloped secondary sex traits. As a part of the IceAGE project (Icelandic marine Animals: Genetics and Ecology), with the support of molecular methods, the first evidence for the existence of highly dimorphic (swimming) males in four families of the superfamily Paratanaoidea (Agathotanaidae, Cryptocopidae, Akanthophoreidae, and Typhlotanaidae) is presented. This study suggests that these males might be the next instars after juvenile or preparatory males, which are morphologically similar to females. It has been assumed that "juvenile" males with a re− stricted ability for swimming (e.g., undeveloped pleopods) have matured testes, are capable of reproduction, and mate with females nearby, while swimming males can mate with dis− tant females. Our explanation of the dimorphism in Tanaidomorpha lies in the fact that males of some species (e.g., Nototanais) retain the same lifestyle or niche as the females, so secondary traits improve their ability to guard females and successfully mate. Males of other species that have moved into a regime (niche) different than that of the female have acquired complex morphological changes (e.g., Typhlotanais).

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“…The absence of direct observations hampers discussion of possible life-styles and behaviours of the pseudotanaid species, but since their morphology parallels to a great extent that seen in many 'swimming males' (Bird & Holdich, 1989b), some inferences can be drawn Their abbreviated pereonites, well-developed pleopods and reduced calcification are adaptations indicative of natatory behaviour, although somc individuals are found, rarely, in mucus 'tubes' or 'nests', which may be associated with brooding (Hassack & Holdich, 1987).…”

Section: Discussionmentioning

confidence: 99%

“…Circumstantial evidence for benthopelagic activity comes from P. cnlonuJ, which was recorded from sediment re-colonization experiments (Bird & Holdich, 1989b), along with some unidentified 'swimming males'. The functions of other structures are also unclear, and the blade-like pereopodal spines, exemplified by those ofP.…”

Section: Discussionmentioning

confidence: 99%

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Tanaidacea (Crustacea) of the north-east Atlantic: the subfamily Pseudotanainae (Pseudotanaidae) and the family Nototanaidae

Bird

Holdich

1989

Zoological Journal of the Linnean Society

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Sixteen species of the tanaidacean subfamily Pseudotanainae and three of the family Nototanaidae have been recorded from shallow and deep waters in the north-east Atlantic. Six new species of Pseudotanais, and c.he new genera Mystriocentrus, Parapseudotanais and Bathytanaissus are described. The species Pseudotunais aznis is re-described, and a cladistic analysis of the 'a@nis' species-group is presented. Pseudotanais is a eurybathic genus and individuals of this taxon are common in the region. The Nototanaidae is poorly represented in the deep-sea, and the present record is the first for the Northern Hemisphere.

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Recolonisation of Artificial Sediments in the Deep Bay of Biscay By Tanaidaceans (Crustacea: Peracarida), With a Description of a New Species of Pseudotanais

Cited by 12 publications

References 18 publications

A tip of the iceberg—Pseudotanaidae (Tanaidacea) diversity in the North Atlantic

A tip of the iceberg—Pseudotanaidae (Tanaidacea) diversity in the North Atlantic

Discovery of Swimming Males of Paratanaoidea (Tanaidacea)

Tanaidacea (Crustacea) of the north-east Atlantic: the subfamily Pseudotanainae (Pseudotanaidae) and the family Nototanaidae

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