Thambema thunderstruckae sp. n., the first record of Thambematidae (Isopoda: Asellota) from the Southern Hemisphere shelf

Zemko, Karol; Kaiser, Stefanie

doi:10.2478/v10183-012-0008-1

Cited by 4 publications

(8 citation statements)

References 12 publications

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“…Generally, the species richness of isopods in Admiralty Bay is high, especially when taking into account the small size of this basin. Currently 441 species of Isopoda are recorded in the whole Southern Ocean (De Broyer et al 2011), while the number of species found in the Admiralty Bay, together with our present results equals 99 (Arnaud et al 1986;Presler 1986;Teodorczyk and Wägele 1994;Zemko and Brix 2011;Zemko and Kaiser 2012;Siciński et al 2012;Zemko et al 2015). This further highlights the fact that this bay is an important biodiversity hot spot for the benthic fauna.…”

Section: Resultssupporting

confidence: 68%

“…High diversity of the Admiralty Bay bottom fauna and its geographic position makes this basin not only a good monitoring point but also a scientific legacy site. Several species of macrofauna, including six isopod species, have type localities in this basin which further confirms its scientific and historic legacy (Teodorczyk and Wägele 1994;Siciński et al 2011;Zemko and Brix 2011;Zemko and Kaiser 2012). A high level of rarity of some isopod species found in the Admiralty Bay shows the importance of a comprehensive species richness assessment of this basin.…”

Section: Resultsmentioning

confidence: 67%

“…Isopods are among the most speciose groups of benthic macrofauna of the Southern Ocean (De Broyer et al 2011) and third most speciose group of benthic macrofauna of Admiralty Bay (Arnaud et al 1986;Presler 1986;Teodorczyk and Wägele 1994;Zemko and Brix 2012;Siciński et al 2012;Zemko and Kaiser 2012;Zemko et al 2015Zemko et al , 2017. However, recent studies of the soft-bottom isopod communities demonstrated that despite the very large sampling effort the species accumulation curves are still steep and a comprehensive evaluation of the isopod species richness in this basin is still far from being complete (Zemko et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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New records of isopod species of the Antarctic Specially Managed Area No. 1, Admiralty Bay, South Shetland Islands

Zemko¹,

Siciński²,

Pabis³

et al. 2017

Polish Polar Research

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Admiralty Bay (King George Island) is an Antarctic Specially Managed Area and one the most thoroughly studied small-scale marine basins in the Southern Ocean. Our study provides new data on the isopod fauna in this glacially affected fjord. Twelve species of isopods were recorded in this basin for the first time. Six of them were found for the first time in the region of the South Shetland Islands. The highest number of species new for Admiralty Bay were found in the families Munnopsidae (4 species) and Munnidae (3 species).

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Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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New records of isopod species of the Antarctic Specially Managed Area No. 1, Admiralty Bay, South Shetland Islands

Zemko¹,

Siciński²,

Pabis³

et al. 2017

Polish Polar Research

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“…So far, a total of 99 species of isopod crustaceans have been recorded in the basin (Arnaud et al 1986;Presler 1986;Teodorczyk and Wagele 1994;Zemko and Kaiser 2012;Siciński et al 2012;Zemko et al 2015;Zemko unpublished results). Isopods are the third most speciose macrofaunal group in the Admiralty Bay, following the Amphipoda (172 species) and Polychaeta (162 species) ).…”

Section: Discussionmentioning

confidence: 99%

“…The Bay has therefore been suggested as a good choice for a monitoring site . Earlier studies analyzing the isopod fauna of the basin were focused on taxonomy (Teodorczyk and Wägele 1994;Zemko and Brix 2011;Zemko and Kaiser 2012), necrophagous assemblages (Presler 1986), the fauna associated with kelp holdfasts (Zemko et al 2015) and shallow nearglacial coves ). In addition, analyzed the macroinvertebrate biomass in the Bay.…”

Section: Introductionmentioning

confidence: 99%

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

et al. 2017

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Isopods belong to the most speciose groups of the Antarctic benthic fauna, although the knowledge on their diversity and small-scale distribution patterns is still limited. Here we analyze the diversity of the isopod fauna in the Admiralty Bay, a glacial fjord on the King George Island. The basin is located in the region of the Antarctic Peninsula, the fastest warming area of the Southern Ocean. The study provides important baseline data for future research, particularly with respect to temporal fluctuations in benthic fauna, associated with global changes observed in that part of the world. Forty species of isopods representing 19 families were recorded on the soft bottom of the Admiralty Bay. The analyses were based on 99 quantitative samples collected, within the 20-502-m depth range, with a 0.1 m 2 van Veen grab. The materials for the analyses were obtained in the austral summer seasons of 1984/1985 and 1985/1986. The data revealed a high number of isopod species occurring at a low abundance, the mean abundance amounting to 4.8 ± 8.6 ind./0.1 m 2 . Most of the species occurred at low abundances, 25% of the species being represented by singletons. Caecognathia polaris, the most abundant species, showed the mean abundance of merely 1.2 ± 4.2 ind./0.1 m 2 . Species richness, diversity and abundance of the isopod fauna were much higher in the central basin of the Admiralty Bay than in the Ezcurra Inlet, an area affected by a strong disturbance of glacial origin.

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A new family Lepidocharontidae with description of Lepidocharon gen. n., from the Great Barrier Reef, Australia, and redefinition of the Microparasellidae (Isopoda, Asellota)

Galassi¹,

Bruce²,

Fiasca³

et al. 2016

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Lepidocharontidae Galassi & Bruce, fam. n. is erected, containing Lepidocharon Galassi & Bruce, gen. n. and two genera transferred from the family Microparasellidae Karaman, 1934: Microcharon Karaman, 1934 and Janinella Albuquerque, Boulanouar & Coineau, 2014. The genus Angeliera Chappuis & Delamare Deboutteville, 1952 is placed as genus incertae sedis in this family. The Lepidocharontidae is characterised by having rectangular or trapezoidal somites in dorsal view, a single free pleonite, a tendency to reduction of the coxal plates, and the unique uropodal morphology of a large and long uropodal protopod on which the slender uropodal exopod articulates separately and anteriorly to the endopod. Lepidocharon Galassi & Bruce, gen. n. has a 6-segmented antennula, a well-developed antennal scale (rudimentary exopod), long and slender pereiopods 1–7 directed outwards, coxal plates rudimentary, incorporated to the lateral side of the sternites, not discernible in dorsal view, the single pleonite narrower than pereionite 7, scale-like elements bordering the proximal part of male pleopod 1 on posterior side, and stylet-guiding grooves of male pleopod 1 which run parallel to the outer lateral margins of the same pleopod. Lepidocharon priapus Galassi & Bruce, sp. n., type species for the genus, and Lepidocharon lizardensis Galassi & Bruce, sp. n. are described from Lizard Island, northern Great Barrier Reef. The most similar genus is Microcharon, both genera sharing the same general organization of the male pleopods 1 and 2, topology and architecture of the stylet-guiding groove of male pleopod 1, morphology of female operculum, presence of 2 robust claws of different lengths on pereiopodal dactylus 1–7, not sexually dimorphic. Lepidocharon gen. n. differs from Microcharon in the shape of the pereionites, very reduced coxal plates, the presence of imbricate scale-like elements bordering the proximal postero-lateral margins of the male pleopod 1, and the topology of the pereiopods, which are ventro-laterally inserted and directed outwards in Lepidocharon gen. n. and dorso-laterally inserted and directed ventrally in Microcharon. Lepidocharon shares with the genus Janinella the morphology of the tergites and the reduced lacinia mobilis of the left mandible, but differs significantly from Janinella in having a well-developed antennal scale, very reduced coxal plates also in females bearing oostegites, the general morphology and spatial arrangement of the stylet-guiding groove of male pleopod 1 and the possession of a 6-segmented antennula. The family Microparasellidae is redefined as monotypic, the only genus being Microparasellus Karaman, 1933.

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Thambema thunderstruckae sp. n., the first record of Thambematidae (Isopoda: Asellota) from the Southern Hemisphere shelf

Cited by 4 publications

References 12 publications

New records of isopod species of the Antarctic Specially Managed Area No. 1, Admiralty Bay, South Shetland Islands

New records of isopod species of the Antarctic Specially Managed Area No. 1, Admiralty Bay, South Shetland Islands

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

A new family Lepidocharontidae with description of Lepidocharon gen. n., from the Great Barrier Reef, Australia, and redefinition of the Microparasellidae (Isopoda, Asellota)

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