The rare ophiuroid species, Ophioleila elegans, was collected by the submersible Jiaolongfrom 1 660 m depth on the Caiwei Guyot located in the Magellan Seamount Chain in the Northwest Pacific Ocean. This is the first ...The rare ophiuroid species, Ophioleila elegans, was collected by the submersible Jiaolongfrom 1 660 m depth on the Caiwei Guyot located in the Magellan Seamount Chain in the Northwest Pacific Ocean. This is the first published record of this species since the types were described from similar habitat off Hawaii. We provide more detailed morphologic characteristics of arm skeleton and a phylogenetic analysis based on CO 1 sequences. Both morphology and phylogeny results suggest that the genus Ophioleila is more closely related to Ophiactids than Hemieuryalids.展开更多
A collection of brachiopods by the Institute of Oceanology . Academia Sinica (Qingdao ). contains eight species from seven genera. Six of the species have been recorded previously from Chinaseas -- Lingula adamsi . L....A collection of brachiopods by the Institute of Oceanology . Academia Sinica (Qingdao ). contains eight species from seven genera. Six of the species have been recorded previously from Chinaseas -- Lingula adamsi . L. anatina, Discinisca Stella. Pelagodiscus allanticus, Campages mariae,Terebratalia coreanica . Two species (Terebratulina hataiana and Frenulina sanguinolenta)have been described from other parts of the Pacific area . The apparent absence of any endemic species is a noteworthy feature of Chinese in comparison with Japanese faunas .展开更多
A new genus and species of axiid shrimp,Carolinaxius kexuae gen.et sp.nov.is described and illustrated based on a single specimen collected from an unnamed seamount in the Caroline Ridge,Northwest Pacific.Although bot...A new genus and species of axiid shrimp,Carolinaxius kexuae gen.et sp.nov.is described and illustrated based on a single specimen collected from an unnamed seamount in the Caroline Ridge,Northwest Pacific.Although both chelipeds are mis sing,the specimen can be distinguished from other axiid genera by a combination of characteristics:narrowly triangular ro strum;median carina and lateral gastric carina each with one prominent tooth;submedian gastric carinae converging po steriorly,with teeth;cornea weakly pigmented,eyestalk with acute distome sial tooth on dorsal surface;male pleopod 1 two-articled;pleopod 2 with appendix interna and appendix masculina;pleopods 3-5 with appendix interna.The molecular phylogeny suggests the new genus is most closely related to another recently described genus living inside hexactinellid sponges on seamounts in the Indian Ocean,Montanaxius Dworschak,2016.However,it differs from Montanaxius in the shape of the rostrum,the arrangement of teeth on the carapace,and the shape of the eyestalk.Besides,the significant molecular differences support the two belonging to different genera.展开更多
At present, descriptions of Cleantioides emarginata Kwon & Kim, 1992 have been limited to the type locality of Pusan, Korea. In this study, we discovered this species in the Changjiang (Yangtze) River estuary, Chi...At present, descriptions of Cleantioides emarginata Kwon & Kim, 1992 have been limited to the type locality of Pusan, Korea. In this study, we discovered this species in the Changjiang (Yangtze) River estuary, China. This represents an extension of the known geographical range of C. emarginata. In addition, we present information of a colour pattern not previously described, along with details on the estuarine habitat of the species.展开更多
The Eocene–Oligocene Southern Ocean is thought to have played a major role in cetacean evolution.Yet,fossils from its heart—Antarctica—are rare,and come almost exclusively from the Eocene La Meseta and Submeseta fo...The Eocene–Oligocene Southern Ocean is thought to have played a major role in cetacean evolution.Yet,fossils from its heart—Antarctica—are rare,and come almost exclusively from the Eocene La Meseta and Submeseta formations of Marambio(Seymour)Island.Here,we provide a summary and update of this crucial fossil assemblage,and discuss its relevance in the broader context of cetacean evolution.To date,Eocene specimens from Antarctica include basilosaurids,a group of archaic stem cetaceans that had already fully adapted to life in water;and the archaic toothed mysticete Llanocetus,the second oldest crown cetacean on record(ca.34 Ma).This Eocene co-occurrence of stem and crown cetaceans is highly unusual,and otherwise only observed in Peru.Though related,at least some of the Antarctic species appear to be different from,and notably larger than their Peruvian counterparts,suggesting an early differentiation of the high latitude cetacean fauna.展开更多
A diverse sessile barnacle fauna from a Miocene shallow-water deposit at Dolnja Stara vas in Slovenia is described.It includes the first descriptions of early post settlement juveniles of Actinobalanus sloveniensis at...A diverse sessile barnacle fauna from a Miocene shallow-water deposit at Dolnja Stara vas in Slovenia is described.It includes the first descriptions of early post settlement juveniles of Actinobalanus sloveniensis attached to mangrove leaves.These represent three distinct growth phases,the earliest being interpreted as being less than 24 h post settlement,the others being 1 to 2 days post settlement.An assessment of their taphonomy is provided.Associated adult balanomorphs are attached to a variety of organic substrates,including mangrove leaves and branches,fragments of the conifers?Taxodioxylon,Carapoxylon,pine cones,molluscs,and cetacean bones.The barnacles include A.sloveniensis,Amphibalanus venustus,and Perforatus perforatus—many with opercula retained within the shells.A.venustus retains some of the original shell color.This is the second record of barnacle–plant associations from the Central Paratethys from Kamnik and Trbovlje.The paleoecology and paleogeography of the site are discussed.展开更多
Museums increasingly seek to publish data on the internet.However,individual records from a natural sciences database are not meaningful.The combined results of a number of datasets can be made much more meaningful by...Museums increasingly seek to publish data on the internet.However,individual records from a natural sciences database are not meaningful.The combined results of a number of datasets can be made much more meaningful by using a graphical display.In this paper,a project undertaken by a group of Australian natural sciences collecting institutions is described.Issues about data quality and other aspects of data management are discussed.展开更多
Diversification in sexual signals is often taken as evidenee for the importance of sexual selection in speciatio n.However,in order for sexual selection to gen erate reproductive isolati on between populations,both si...Diversification in sexual signals is often taken as evidenee for the importance of sexual selection in speciatio n.However,in order for sexual selection to gen erate reproductive isolati on between populations,both signals and mate preferences must diverge together.Furthermore,assortative mating may result from multiple behavioral mecha nisms,in eluding female mate pref ere nces,male mate preferences,and male-male competition;yet their relative contributions are rarely evaluated.Here,we explored the role of mate pref ere nces and male competitive ability as pote ntial barriers to gene flow between 2 diverge nt lineages of the taw ny dragon lizard,Ctenophorus decresii,which differ in male throat coloration.We found stronger behavioral barriers to pairings between southern lineage males and northern lineage females than between northern males and southern females,indicating incomplete and asymmetric behavioral isolating barriers.These results were driven by both male and female mate preferences rather than lineage differences in male competitive ability.In trasexual selecti on is therefore un likely to drive the outcome of sec on dary contact in C.decresii,despite its widely ack no wledged importa nee in lizards.Our results are consiste nt with the emergi ng view that although both male and female mate pref ere nces can diverge alongside sexual signals,speciation is rarely driven by divergent sexual selection alone.展开更多
The World Register of Marine Species(WoRMS)is a well-known biodiversity information system,designed as a global open-access inventory of the names of marine taxa,whose website1 and databases are developed and hosted b...The World Register of Marine Species(WoRMS)is a well-known biodiversity information system,designed as a global open-access inventory of the names of marine taxa,whose website1 and databases are developed and hosted by the Flanders Marine Institute(Ostend,Belgium).Established in 2007,WoRMS has been growing in both content and popularity ever since(Costello et al.2013).The aim of WoRMS is to provide an authoritative and comprehensive list of names of marine organisms arranged in the most up-to-date and stable hierarchy as determined by the appropriate editor(Horton et al.2017).展开更多
基金The National Basic Research Program(973 Program)of China under contract No.2015CB755902the Foundation of China Ocean Mineral Resources R&D Association under contract Nos DY135-E2-2-03 and DY135-E2-2-06+1 种基金the Scientific Research Fund of the Second Institute of Oceanography,SOA under contract No.JG1537the National Natural Science Foundation of China under contract No.41406175
文摘The rare ophiuroid species, Ophioleila elegans, was collected by the submersible Jiaolongfrom 1 660 m depth on the Caiwei Guyot located in the Magellan Seamount Chain in the Northwest Pacific Ocean. This is the first published record of this species since the types were described from similar habitat off Hawaii. We provide more detailed morphologic characteristics of arm skeleton and a phylogenetic analysis based on CO 1 sequences. Both morphology and phylogeny results suggest that the genus Ophioleila is more closely related to Ophiactids than Hemieuryalids.
文摘A collection of brachiopods by the Institute of Oceanology . Academia Sinica (Qingdao ). contains eight species from seven genera. Six of the species have been recorded previously from Chinaseas -- Lingula adamsi . L. anatina, Discinisca Stella. Pelagodiscus allanticus, Campages mariae,Terebratalia coreanica . Two species (Terebratulina hataiana and Frenulina sanguinolenta)have been described from other parts of the Pacific area . The apparent absence of any endemic species is a noteworthy feature of Chinese in comparison with Japanese faunas .
基金the Science&Technology Basic Resources Investigation Program of China(No.2017FY100804)the Natural Science Foundation of China(Nos.41930533,41876178)+1 种基金the National Key R&D Program of China(No.2018YFC0309804)the China Ocean Mineral Resources Research and Development Association Program(Nos.DY135-E2-1-02,DY135-E2-3-04)。
文摘A new genus and species of axiid shrimp,Carolinaxius kexuae gen.et sp.nov.is described and illustrated based on a single specimen collected from an unnamed seamount in the Caroline Ridge,Northwest Pacific.Although both chelipeds are mis sing,the specimen can be distinguished from other axiid genera by a combination of characteristics:narrowly triangular ro strum;median carina and lateral gastric carina each with one prominent tooth;submedian gastric carinae converging po steriorly,with teeth;cornea weakly pigmented,eyestalk with acute distome sial tooth on dorsal surface;male pleopod 1 two-articled;pleopod 2 with appendix interna and appendix masculina;pleopods 3-5 with appendix interna.The molecular phylogeny suggests the new genus is most closely related to another recently described genus living inside hexactinellid sponges on seamounts in the Indian Ocean,Montanaxius Dworschak,2016.However,it differs from Montanaxius in the shape of the rostrum,the arrangement of teeth on the carapace,and the shape of the eyestalk.Besides,the significant molecular differences support the two belonging to different genera.
基金Supported by the Innovate Funds of East China Normal University(No.78210097)the Innovate Funds of the State Key Laboratory of Estuarine and Coastal Research(No.2010RCDW15)the National Natural Science Foundation of China(Nos.41201441,40906046)
文摘At present, descriptions of Cleantioides emarginata Kwon & Kim, 1992 have been limited to the type locality of Pusan, Korea. In this study, we discovered this species in the Changjiang (Yangtze) River estuary, China. This represents an extension of the known geographical range of C. emarginata. In addition, we present information of a colour pattern not previously described, along with details on the estuarine habitat of the species.
文摘The Eocene–Oligocene Southern Ocean is thought to have played a major role in cetacean evolution.Yet,fossils from its heart—Antarctica—are rare,and come almost exclusively from the Eocene La Meseta and Submeseta formations of Marambio(Seymour)Island.Here,we provide a summary and update of this crucial fossil assemblage,and discuss its relevance in the broader context of cetacean evolution.To date,Eocene specimens from Antarctica include basilosaurids,a group of archaic stem cetaceans that had already fully adapted to life in water;and the archaic toothed mysticete Llanocetus,the second oldest crown cetacean on record(ca.34 Ma).This Eocene co-occurrence of stem and crown cetaceans is highly unusual,and otherwise only observed in Peru.Though related,at least some of the Antarctic species appear to be different from,and notably larger than their Peruvian counterparts,suggesting an early differentiation of the high latitude cetacean fauna.
基金We are indebted to Lenka Váchováwho kindly prepared SEM pictures(Hitachi S-3700 N)we kindly thank Jan Sklenár for his free access to an Olympus microscope at NM,Prague+2 种基金T.K.was supported by the Ministry of Culture of the Czech Republic(DKRVO 20222.III.c)M.K.V.was supported by the RVO 67985831 of the Institute of Geology of the Czech Academy of Sciences,v.v.ithe Center for Geosphere Dynamics(UNCE/SCI/006).
文摘A diverse sessile barnacle fauna from a Miocene shallow-water deposit at Dolnja Stara vas in Slovenia is described.It includes the first descriptions of early post settlement juveniles of Actinobalanus sloveniensis attached to mangrove leaves.These represent three distinct growth phases,the earliest being interpreted as being less than 24 h post settlement,the others being 1 to 2 days post settlement.An assessment of their taphonomy is provided.Associated adult balanomorphs are attached to a variety of organic substrates,including mangrove leaves and branches,fragments of the conifers?Taxodioxylon,Carapoxylon,pine cones,molluscs,and cetacean bones.The barnacles include A.sloveniensis,Amphibalanus venustus,and Perforatus perforatus—many with opercula retained within the shells.A.venustus retains some of the original shell color.This is the second record of barnacle–plant associations from the Central Paratethys from Kamnik and Trbovlje.The paleoecology and paleogeography of the site are discussed.
文摘Museums increasingly seek to publish data on the internet.However,individual records from a natural sciences database are not meaningful.The combined results of a number of datasets can be made much more meaningful by using a graphical display.In this paper,a project undertaken by a group of Australian natural sciences collecting institutions is described.Issues about data quality and other aspects of data management are discussed.
基金Permits and ethics approval to perform the research were obtained from The University of Melbourne Animal Ethics Committee(1413220.3)the South Australian Wildlife Ethics Committee(25/2015)+1 种基金the South Australian Department of Environment,Water and Natural Resources(Q26428-2)the Victorian Department of Environment,Land,Water and Planning(10007751).This work was supported by funding from the Australian Research Council(DP150101044)to D.S.-F.
文摘Diversification in sexual signals is often taken as evidenee for the importance of sexual selection in speciatio n.However,in order for sexual selection to gen erate reproductive isolati on between populations,both signals and mate preferences must diverge together.Furthermore,assortative mating may result from multiple behavioral mecha nisms,in eluding female mate pref ere nces,male mate preferences,and male-male competition;yet their relative contributions are rarely evaluated.Here,we explored the role of mate pref ere nces and male competitive ability as pote ntial barriers to gene flow between 2 diverge nt lineages of the taw ny dragon lizard,Ctenophorus decresii,which differ in male throat coloration.We found stronger behavioral barriers to pairings between southern lineage males and northern lineage females than between northern males and southern females,indicating incomplete and asymmetric behavioral isolating barriers.These results were driven by both male and female mate preferences rather than lineage differences in male competitive ability.In trasexual selecti on is therefore un likely to drive the outcome of sec on dary contact in C.decresii,despite its widely ack no wledged importa nee in lizards.Our results are consiste nt with the emergi ng view that although both male and female mate pref ere nces can diverge alongside sexual signals,speciation is rarely driven by divergent sexual selection alone.
文摘The World Register of Marine Species(WoRMS)is a well-known biodiversity information system,designed as a global open-access inventory of the names of marine taxa,whose website1 and databases are developed and hosted by the Flanders Marine Institute(Ostend,Belgium).Established in 2007,WoRMS has been growing in both content and popularity ever since(Costello et al.2013).The aim of WoRMS is to provide an authoritative and comprehensive list of names of marine organisms arranged in the most up-to-date and stable hierarchy as determined by the appropriate editor(Horton et al.2017).
