Epibionts are floristic and faunistic benthonic organisms living attached to the skin of another animal; this phenomenon is well known as epibiosis and has been documented for all species of marine turtles. The intera...Epibionts are floristic and faunistic benthonic organisms living attached to the skin of another animal; this phenomenon is well known as epibiosis and has been documented for all species of marine turtles. The interaction between the turtle and epibiotic organisms is to provide substrate for the epibionts communities, their presence are based mainly in the shell and in other anatomical structures in lower intensity. It has been registered that some epibionts affect growth, and can cause diverse damage in anatomical structures like the eyes, mouth, and limbs. They are usually vectors of disease. For such reasons the objective of the present work is to determinate the epibionts species associated with the marine turtle Lepidochelys olivacea in Ceuta beach, Sinaloa, Mexico. During the nesting season May-December of 2008-2009, the female turtles nesting and strandings were monitored and epibionts were collected. Eleven species distributed in the following taxa were obtained： fishes of the family Echeneidae, Hirudineos （Ozobranchus branchiatus, Ozobranchus margoi）, Arthropods （Chelonibia testudinaria, Lepas sp., Conchoderma virgatum） and the first registry of Stephanolepas muricata for Lepidochelys olivacea. According to the records from Ceuta Beach the species of epibionts are still being registered with the exception of Ozobranchus margoi, and Stephanolepas muricata, thus, suggesting further research on epibiont organisms.展开更多
The microalgal epibiontic communities of the brachyuran crabs Dorippe quadridens, Schizophrys aspera and Hyastenus hilgendorfi were studied during spring and summer of 2011. A total of 68 microalgal species of four ph...The microalgal epibiontic communities of the brachyuran crabs Dorippe quadridens, Schizophrys aspera and Hyastenus hilgendorfi were studied during spring and summer of 2011. A total of 68 microalgal species of four phyla （Chlorophyta, Bascillariophyta, Cyanophyta and Pyrrhophyta） was recorded in the epibiosis of the investigated brachyuran crabs males and females Generally, Bascillariophyta predominate in number of species over the other microalgal groups, followed by Cyanophyta and Pyrrhophyta, while Chlorophyta was represented by the lowest number of species. Highly percentage of occurrence of microalgal epibionts was observed on the dorsal part of the investigated crabs followed by chela and ventral parts.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
Fossil cephalopods are frequently encrusted by epibionts;however,determining whether encrustation occurred prior to or post-mortem to the host,and whether the final environment of deposition corresponds to the habitat...Fossil cephalopods are frequently encrusted by epibionts;however,determining whether encrustation occurred prior to or post-mortem to the host,and whether the final environment of deposition corresponds to the habitat of encrustation is complex.The present paper describes cirripede epibionts,their calcareous bases and their attachment scars on 6 post-mortem shells of Nautilus macromphalus,collected from deep water off New Caledonia.The cirripedes have left both cemented calcareous bases of Hexelasma and scars associated with bioerosion and discoloration produced by verrucomorph barnacles.Live cirripedes included a Metaverruca recta,with articulated opercular plates and organic tissue(on a shell that had been exposed on the sea floor for at least 150 years),and specimens of Hexelasma velutinum,one of which was partly attached to an internal surface of a shell.The disposition of verrucomorphs indicates that most Nautilus shells were colonized post-mortem rather than during a floating stage.However,as cirripedes are known to have colonized living Nautilus,some Hexelasma,preserved only as calcareous eroded bases,may represent specimens that settled on a living Nautilus.The degree of bioerosion and discoloration induced by verrucomorph barnacles varies according to the surface preservation of Nautilus shells,with deeper and discolored traces preserved on old and degraded shells.Traces made by verrucomorphs described here are ellipsoidal and a new ichnotaxon,Anellusichnus ellipticus,is proposed to accommodate them.Importantly,verrucomorphs and other cirripede taxa with membranous bases that were attached to pristine shells may not leave any substantial scars,and,thus,will be difficult to detect in the fossil record.展开更多
文摘Epibionts are floristic and faunistic benthonic organisms living attached to the skin of another animal; this phenomenon is well known as epibiosis and has been documented for all species of marine turtles. The interaction between the turtle and epibiotic organisms is to provide substrate for the epibionts communities, their presence are based mainly in the shell and in other anatomical structures in lower intensity. It has been registered that some epibionts affect growth, and can cause diverse damage in anatomical structures like the eyes, mouth, and limbs. They are usually vectors of disease. For such reasons the objective of the present work is to determinate the epibionts species associated with the marine turtle Lepidochelys olivacea in Ceuta beach, Sinaloa, Mexico. During the nesting season May-December of 2008-2009, the female turtles nesting and strandings were monitored and epibionts were collected. Eleven species distributed in the following taxa were obtained： fishes of the family Echeneidae, Hirudineos （Ozobranchus branchiatus, Ozobranchus margoi）, Arthropods （Chelonibia testudinaria, Lepas sp., Conchoderma virgatum） and the first registry of Stephanolepas muricata for Lepidochelys olivacea. According to the records from Ceuta Beach the species of epibionts are still being registered with the exception of Ozobranchus margoi, and Stephanolepas muricata, thus, suggesting further research on epibiont organisms.
文摘The microalgal epibiontic communities of the brachyuran crabs Dorippe quadridens, Schizophrys aspera and Hyastenus hilgendorfi were studied during spring and summer of 2011. A total of 68 microalgal species of four phyla （Chlorophyta, Bascillariophyta, Cyanophyta and Pyrrhophyta） was recorded in the epibiosis of the investigated brachyuran crabs males and females Generally, Bascillariophyta predominate in number of species over the other microalgal groups, followed by Cyanophyta and Pyrrhophyta, while Chlorophyta was represented by the lowest number of species. Highly percentage of occurrence of microalgal epibionts was observed on the dorsal part of the investigated crabs followed by chela and ventral parts.
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.
基金the Ministry of Culture of the Czech Republic(IP DKRVO 2019/2.III.a,National Museum,00023272)MKVs research was supported by the Center for Geosphere Dynamics(UNCE/SCI/006)+1 种基金by the RVO 67985831 of the Institute of Geology of the Czech Academy of Sciences.JS and AT were funded by the Slovak Scientific Grant Agency(VEGA 2/0169/19)by the Slovak Agency for Research and Development(APVV 17-0555).
文摘Fossil cephalopods are frequently encrusted by epibionts;however,determining whether encrustation occurred prior to or post-mortem to the host,and whether the final environment of deposition corresponds to the habitat of encrustation is complex.The present paper describes cirripede epibionts,their calcareous bases and their attachment scars on 6 post-mortem shells of Nautilus macromphalus,collected from deep water off New Caledonia.The cirripedes have left both cemented calcareous bases of Hexelasma and scars associated with bioerosion and discoloration produced by verrucomorph barnacles.Live cirripedes included a Metaverruca recta,with articulated opercular plates and organic tissue(on a shell that had been exposed on the sea floor for at least 150 years),and specimens of Hexelasma velutinum,one of which was partly attached to an internal surface of a shell.The disposition of verrucomorphs indicates that most Nautilus shells were colonized post-mortem rather than during a floating stage.However,as cirripedes are known to have colonized living Nautilus,some Hexelasma,preserved only as calcareous eroded bases,may represent specimens that settled on a living Nautilus.The degree of bioerosion and discoloration induced by verrucomorph barnacles varies according to the surface preservation of Nautilus shells,with deeper and discolored traces preserved on old and degraded shells.Traces made by verrucomorphs described here are ellipsoidal and a new ichnotaxon,Anellusichnus ellipticus,is proposed to accommodate them.Importantly,verrucomorphs and other cirripede taxa with membranous bases that were attached to pristine shells may not leave any substantial scars,and,thus,will be difficult to detect in the fossil record.
