The hydrothermal crab,<i>Xenograpsus testudinatus</i>Ng, Huang &amp; Ho, 2000 (Crustacea: Decapoda: Brachyura: Grapsidae) in southern Japan

Ng, N. K.; Suzuki, Hiroshi; Shih, Hsi‐Te; Dewa, Shin-ichi; Ng, Peter K. L.

doi:10.2988/0006-324x-127.2.391

Cited by 16 publications

(16 citation statements)

References 10 publications

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“…However, according to the present molecular evidence, the inclusion of Leptograpsodes octodentatus in the family appears taxonomically inappropriate. Schubart () suggested relocating Leptograpsodes octodentatus into the family Xenograpsidae, which consists of three extant species inhabiting shallow hydrothermal vents (Ng et al ., ; erroneously referred to Grapsidae in Ng et al ., ). The present study included a member from Xenograpsidae as an outgroup and reproduced the same result as in Schubart (): Leptograpsodes octodentatus shows a close relationship to Xenograpsus testudinatus .…”

Section: Discussionmentioning

confidence: 97%

Phylogeny of the shore crab family Grapsidae (Decapoda: Brachyura: Thoracotremata) based on a multilocus approach

Schubart

Tsang

et al. 2015

Zool J Linn Soc

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The Grapsidae are a thoracotreme crab family with 40 species in eight genera (in their strict definition), and possess a number of morphological and molecular synapomorphies. Previous phylogenetic studies based on mitochondrial DNA markers established the monophyly of this family, but suggested possible paraphyly or polyphyly of some of the constituent genera. To test the validity of previous hypotheses, the present study reconstructed a molecular phylogeny of the grapsid crabs based on five molecular markers, including mitochondrial DNA markers and the first use of nuclear protein-coding markers to address this issue. Monophyly of Grapsidae was confirmed, with the exception of the position of the monotypic genus Leptograpsodes. The polyphyly of the genus Pachygrapsus is consistent with previous molecular phylogenies, as members from this genus are dispersed throughout our gene tree. Grapsus and Planes were shown to be paraphyletic, with species of Pachygrapsus nested within them. Our study found incongruences between the currently adopted classification of the family, and hence taxonomic revisions will be needed. We hereby demonstrate the use of nuclear protein-coding markers for high confidence reconstruction of decapod phylogenies, resolving most of the early splits that mitochondrial DNA markers alone are unable to tackle.

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Section: Discussionmentioning

confidence: 97%

Phylogeny of the shore crab family Grapsidae (Decapoda: Brachyura: Thoracotremata) based on a multilocus approach

Schubart

Tsang

et al. 2015

Zool J Linn Soc

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“…testudinatus . Xenograpsus testudinatus was also recorded in deep-sea vents of Taiwan [ 46 ] and shallow-water vents of Japan [ 47 ]. Although the preferred habitat of the species in deeper water remains uncertain, its cogeneric, X .…”

Section: Discussionmentioning

confidence: 99%

Community Structure of Macrobiota and Environmental Parameters in Shallow Water Hydrothermal Vents off Kueishan Island, Taiwan

et al. 2016

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Hydrothermal vents represent a unique habitat in the marine ecosystem characterized with high water temperature and toxic acidic chemistry. Vents are distributed at depths ranging from a few meters to several thousand meters. The biological communities of shallow-water vents have, however, been insufficiently studied in most biogeographic areas. We attempted to characterize the macrofauna and macroflora community inhabiting the shallow-water vents off Kueishan Island, Taiwan, to identify the main abiotic factors shaping the community structure and the species distribution. We determined that positively buoyant vent fluid exhibits a more pronounced negative impact to species on the surface water than on the bottom layer. Species richness increased with horizontal distance from the vent, and continuing for a distance of 2000 m, indicating that the vent fluid may exert a negative impact over several kilometers. The community structure off Kueishan Island displayed numerous transitions along the horizontal gradient, which were broadly congruent with changes in environmental conditions. Combination of variation in Ca2+, Cl-, temperature, pH and depth were revealed to show the strongest correlation with the change in benthic community structure, suggesting multiple factors of vent fluid were influencing the associated fauna. Only the vent crabs of Kueishan Island may have an obligated relationship with vents and inhabit the vent mouths because other fauna found nearby are opportunistic taxa that are more tolerant to acidic and toxic environments.

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“…The hydrothermal vent water is toxic because it is rich of sulfides among other natural compounds [11,12]. In such a special environment, a variety of highly adapted organisms occur, such as the crab Macromedaeus distinguendus (De Haan, 1835) [13] and Xenograpsus testudinatus N. K. Ng, J.-F. Huang & Ho, 2000 [14], copepods [15][16], anemones [17][18], several species of mollusks [17][18][19][20], and the azooxanthellate scleractinian coral Tubastrea spp. [17].…”

Section: Introductionmentioning

confidence: 99%

“…Among these macroinvertebrates, the most abundant and representative benthic invertebrate is the grapsoid crab X. testudinatus, inhabiting an open seabed of the hydrothermal vent area, with large rocks and sandy bottoms [11,21]. Specimens of this crab were firstly discovered from fishery bycatches [14]. Later there were several related research reports on it, such as on its detoxification mechanism [17], bioaccumulation of trace metals [22], metabolic energy demands, and food utilization [23], feeding [24][25], selective behavior [26], role in the trophic structure [27][28], and reproduction [28].…”

Section: Introductionmentioning

confidence: 99%

Distribution and sexual dimorphism of the crab Xenograpsus testudinatus from the hydrothermal vent field of Kueishan Island, northeastern Taiwan

Tseng

Hwang

2020

PLoS ONE

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The sulphur-rich and acidic vent waters of a shallow hydrothermal vent field next to Kueishan Island in Taiwan provide a specific and generally toxic environment. Among only a few aquatic organisms able to survive there, the grapsoid crab Xenograpsus testudinatus is the dominant species with a high population density in the vent area. Here we study the gender-specific distribution, morphological traits, and relationship of wet weight vs. carapace width of this crab. A total of 1120 individuals including 831 male and 289 female (included 15 ovigerous) were examined during August and September in 2011 and May and September in 2012. Except in August 2011, there are no significant differences in the distribution of X. testudinatus in the hydrothermal vent area from the vent spout during most months. Among crabs, the weight of male (6.87 ± 2.90 g) was significantly heavier than that of females (4.17

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The hydrothermal crab,Xenograpsus testudinatusNg, Huang & Ho, 2000 (Crustacea: Decapoda: Brachyura: Grapsidae) in southern Japan

Cited by 16 publications

References 10 publications

Phylogeny of the shore crab family Grapsidae (Decapoda: Brachyura: Thoracotremata) based on a multilocus approach

Phylogeny of the shore crab family Grapsidae (Decapoda: Brachyura: Thoracotremata) based on a multilocus approach

Community Structure of Macrobiota and Environmental Parameters in Shallow Water Hydrothermal Vents off Kueishan Island, Taiwan

Distribution and sexual dimorphism of the crab Xenograpsus testudinatus from the hydrothermal vent field of Kueishan Island, northeastern Taiwan

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