The Earliest Endosymbiotic Mineralized Tubeworms from the Silurian of Podolia, Ukraine

  title={The Earliest Endosymbiotic Mineralized Tubeworms from the Silurian of Podolia, Ukraine},
  author={Olev Vinn and Mari-Ann M{\~o}tus},
Abstract The earliest endosymbiotic tubeworms have been discovered within skeletons of the tabulate coral Heliolites sp. from the Silurian (Ludlow) of Podolia, Ukraine. The new tubeworm species has a maximum diameter about 1 mm, a slightly conical tube, a smooth lumen in the tube and a lamellar wall structure. The tube wall is 0.05–0.10 mm thick. The new endosymbiotic tubeworm Coralloconchus bragensis n. gen. and sp. shares zoological affinities with the tentaculitids (incertae sedis) and is… 
The worm endosymbionts in tabulate corals from the Silurian of Podolia, Ukraine
Two endosymbionts, Chaetosalpinx sibiriensis and Coralloconchus bragensis, occur in Silurian tabulate corals of Podolia and showed no preference for the favositid or heliolitid type of morphology.
Calcareous tubeworms of the Phanerozoic
Morphological similarities indicate that Palaeozoic problematic tubeworms, e.g. tentaculitids, cornulitids, microconchids, trypanoporids, Anticalyptraea, and Tymbochoos, form a monophyletic group.
New endobiotic cornulitid and Cornulites sp. aff. Cornulites celatus (Cornulitida, Tentaculita) from the Katian of Vormsi Island, Estonia
Two species of endobiotic cornulitids are described from heliolitid corals of the Katian (Late Ordovician) of Estonia. They are thus far the earliest known showing this symbiotic relationship.
Shell repair in Anticalyptraea (Tentaculita) in the late Silurian (Pridoli) of Baltica
  • O. Vinn
  • Geography, Environmental Science
  • 2012
Shell repair is common in the late Silurian (Pridoli) encrusting tentaculitoid tubeworm Anticalyptraea calyptrata from Saaremaa, Estonia (Baltica), and is interpreted here as a result of failed
Phenetic phylogenetics of tentaculitoids – extinct, problematic calcareous tube-forming organisms
Tentaculitoids belong to Lophotrochozoa with a high degree of certainty and are best classified as “lophophorates”, most likely Brachiozoa.
Attempted predation on Early Paleozoic cornulitids
  • O. Vinn
  • Geography, Environmental Science
  • 2009
Symbiotic interactions in the Silurian of Baltica
The number of different pairs of symbiotic taxa also increased in the Wenlock, which may be linked to delayed recovery from the end-Ordovician mass extinction and an increase in the number of mutualistic taxa that could have had evolutionary advantages over organisms less amenable to symbiosis.
Shell microstructure of Cornulites semiapertus Öpik, 1930 and other early cornulitids from the Ordovician of North Estonia
  • O. Vinn
  • Environmental Science, Geography
  • 2010
The shell microstructure of Ordovician Cornulites species is in general similar to Silurian species. The earliest cornulitid from Baltica, C. semiapertus Öpik, 1930 (Darriwilian), has vesicles,
The first record of cornulitids tubeworms from the early Late Ordovician of Spiti, Tethyan Himalaya, India
ABSTRACT Tentaculitoid tubeworms, an extinct invertebrate group, is being reported from the Ordovician strata of Spiti, Tethyan Himalaya, India. External and internal moulds of tentaculitoids are


Microconchid tubeworms from the Jurassic of England and France
Punctaconchus, the youngest unequivocal microconchid, is characterised by having large pores (punctae) penetrating the tube wall, which has a fibrous or platy lamellar microstructure, and ripplemark−like transverse ridges on the tube interior.
A New Endosymbiont in Late Ordovician Tabulate Corals from Anticosti Island, Eastern Canada
Cylindrical tubes of the trace fossil Chaetosalpinx occur within the skeletal walls of Late Ordovician sarcinulid tabulate corals preserved on Anticosti Island. A large host-specific embedment
A new cornulitid genus from the Silurian of Gotland, Sweden
A new genus and species Septalites septatus is described from the Silurian of Gotland that resembles Conchicolites in having a smooth tube interior with multiple septa, but differs in the greater number of septa and microlamellar tube structure.
The problematic fossil Anticalyptraea Quenstedt, 1867, traditionally interpreted as a phorid gastropod, is here assigned to the Class Tentaculita, which closely resembles Trypanopora but differs from gastropods in having pseudopunctae and a vesicular shell structure.
Symbiosis between gastropods and bryozoans in the late Ordovician of Cumbria, England
Five examples of symbiosis between gastropods and trepostome bryozoans are described from the Ashgill (late Ordovician) of Cumbria (England) and a new species Spiroecus nidhoeggi is described.
Abstract:  Tube ultrastructure of Jurassic and Cretaceous Glomerula is very similar to that of Recent Calcisabella, supporting the synonymy of these genera and the early Mesozoic origin of
Microstructure and affinity of the enigmatic Devonian tubular fossil Trypanopora
  • M. Weedon
  • Geography, Environmental Science
  • 1991
The adult shell of the enigmatic tubular Givetian fossil Trypanopora is comprised of an outer fibrous prismatic layer and an inner micro-lamellar layer, with local, closely-spaced disruptive punctation, suggesting an original calcite composition.
Palaeoecology and diversity of endosymbionts in Palaeozoic marine invertebrates: Trace fossil evidence
A collapse in bioclaustration diversity and abundance during the Late Devonian is most significant among endosymbionts of host coral and calcareous sponge taxa that were in decline leading up to the Frasnian–Famennian mass extinction.
Age-estimation of the christmas tree worm Spirobranchus giganteus (Polychaeta, Serpulidae) living buried in the coral skeleton from the coral-growth band of the host coral
The application of soft X-rays for age determination of coral associated polychaete is useful for determining the correct age.