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
The fossil history of turtle and whale barnacles(Coronuloidea:Chelonibiidae,Platylepadidae,Coronulidae and†Emersoniidae)is fragmentary and has only been investigated in part.Morphological inferences and molecular phyl...The fossil history of turtle and whale barnacles(Coronuloidea:Chelonibiidae,Platylepadidae,Coronulidae and†Emersoniidae)is fragmentary and has only been investigated in part.Morphological inferences and molecular phylogenetic analyses on extant specimens suggest that the roots of whale barnacles(Coronulidae)are to be found among the chelonibiid turtle barnacles,but the hard-part modifications that enabled early coronuloids to attach to the cetacean skin are still largely to be perceived.Here,we reappraise a fossil chelonibiid specimen from the Miocene of insular Tanzania that was previously referred to the living species Chelonibia caretta.This largely forgotten specimen is here described as the holotype of the new species†Chelonibia zanzibarensis.While similar to C.caretta,†C.zanzibarensis exhibits obvious external longitudinal parietal canals occurring in-between external longitudinal parietal septa that abut outwards to form T-shaped flanges,a character so far regarded as proper of the seemingly more derived Coronulidae and Platylepadidae.Along with these features,the presence of a substrate imprint on the shell exterior indicates that†C.zanzibarensis grasped its host’s integument in much the same way as coronulids and platylepadids,albeit without the development of macroscopic parietal buttresses and bolsters.Thin section analyses of the inner parietal architecture of some extant and extinct coronuloids conclusively demonstrate that vestiges of comparable external parietal microstructures are present in some living members of Chelonibiidae.This observation strengthens the unity of Coronuloidea while significantly contributing to our understanding of the evolution of the coronuloid shell structure in adapting to a diverse spectrum of hosts.展开更多
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).
文摘The fossil history of turtle and whale barnacles(Coronuloidea:Chelonibiidae,Platylepadidae,Coronulidae and†Emersoniidae)is fragmentary and has only been investigated in part.Morphological inferences and molecular phylogenetic analyses on extant specimens suggest that the roots of whale barnacles(Coronulidae)are to be found among the chelonibiid turtle barnacles,but the hard-part modifications that enabled early coronuloids to attach to the cetacean skin are still largely to be perceived.Here,we reappraise a fossil chelonibiid specimen from the Miocene of insular Tanzania that was previously referred to the living species Chelonibia caretta.This largely forgotten specimen is here described as the holotype of the new species†Chelonibia zanzibarensis.While similar to C.caretta,†C.zanzibarensis exhibits obvious external longitudinal parietal canals occurring in-between external longitudinal parietal septa that abut outwards to form T-shaped flanges,a character so far regarded as proper of the seemingly more derived Coronulidae and Platylepadidae.Along with these features,the presence of a substrate imprint on the shell exterior indicates that†C.zanzibarensis grasped its host’s integument in much the same way as coronulids and platylepadids,albeit without the development of macroscopic parietal buttresses and bolsters.Thin section analyses of the inner parietal architecture of some extant and extinct coronuloids conclusively demonstrate that vestiges of comparable external parietal microstructures are present in some living members of Chelonibiidae.This observation strengthens the unity of Coronuloidea while significantly contributing to our understanding of the evolution of the coronuloid shell structure in adapting to a diverse spectrum of hosts.
