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668 results for “polychaetes”
Fig. 5 in Biotic interaction between spionid polychaetes and bouchardiid brachiopods: Paleoecological, taphonomic and evolutionary implications
Fig. 5. Spionid polychaete Polydora sp. found in association with Bouchardia rosea shells, Ubatuba Bight, 10 and 20 m depth. Specimen DZP−18668. A, B. Anterior segments of Polydora showing the characteristic modified chaetae (arrows) in its 5th segment. C. Polydora hooks (arrow) from the median segments. D. Posterior segments of Polydora showing the flanged pygidium (arrow). Scale bars 100 µm.
Fig. 3 in Biotic interaction between spionid polychaetes and bouchardiid brachiopods: Paleoecological, taphonomic and evolutionary implications
Fig. 3. General shell morphology of bouchardiid brachiopods. A–C. Bouchardia rosea (Mawe, 1823) from modern accumulations from the Ubatuba coast, State of São Paulo, Brazil. A. Specimen DZP−18669. B. Specimen DZP−18670. C. Specimen DZP−18671. D–F. Bouchardia transplatina Ihering, 1907 from the Cerro Bautista locality, the Camacho Formation, Late Miocene, Uruguay. D. Specimen FCDP−2305E. E. Specimen FCDP−2305G. F. Specimen FCDP−2305K. G–I. Bouchardia zitteli Ihering, 1897 from the Manantial Salado locality, the San Julian Formation, Late Oligocene, Argentina. G. Specimen IGC−DPE−855D. H. Specimen IGC−DPE−865H. I. Specimen IGC−DPE−865N. Scale bars 5 mm.
Fig. 6 in The earliest annelids: Lower Cambrian polychaetes from the Sirius Passet Lagerstätte, Peary Land, North Greenland
Fig. 6. Polychaete annelid Phragmochaeta canicularis gen. et sp. nov., Lower Cambrian (Atdabanian), Buen Formation, Sirius Passet Lagerstätte, Peary Land, North Greenland. A. MGUH 28.894. B. MGUH 28.895. C. MGUH 28.896. D. MGUH 28.897. E. MGUH 28.898. F. MGUH 28.899. All specimens coated with ammonium chloride sublimate. Scale bars 3 mm. Abbreviations: AC, anterior chaetae (probably the notochaetae); Gut, gut (alimentary canal); Gut Co, gut contents; MU, muscles flanking the gut; NeC, neurochaetae; NoC, notochaetae; Pa, parapodia; Ve?, presumed ventral surface.
Fig. 5 in The earliest annelids: Lower Cambrian polychaetes from the Sirius Passet Lagerstätte, Peary Land, North Greenland
Fig. 5. Polychaete annelid Phragmochaeta canicularis gen. et sp. nov., Lower Cambrian (Atdabanian), Buen Formation, Sirius Passet Lagerstätte, Peary Land, North Greenland. A. MGUH 28.889. B. MGUH 28.890. C. MGUH 28.891. D. MGUH 28.885. E. MGUH 28.892. F. MGUH 28.893. All specimens coated with ammonium chloride sublimate. Scale bars 3 mm. Abbreviations: Gut, gut (alimentary canal); MU, muscles flanking the gut; MU?, presumed muscles flanking the gut; NeC, neurochaetae; NoC, notochaetae; Pa, parapodia.
Fig. 2 in The earliest annelids: Lower Cambrian polychaetes from the Sirius Passet Lagerstätte, Peary Land, North Greenland
Fig. 2. Polychaete annelid Phragmochaeta canicularis gen. et sp. nov., Lower Cambrian (Atdabanian), Buen Formation, Sirius Passet Lagerstätte, Peary Land, North Greenland. A. MGUH 28.880, dorsal view (A1) with anterior enlarged (A2). B. MGUH 28.881. C. MGUH 28.882. D. MGUH 28.883. All specimens coated with ammonium chloride sublimate. Scale bars 2 mm. Abbreviations: AC, anterior chaetae (probably the notochaetae); NeC, neurochaetae; NoC, notochaetae; MU, muscles flanking the gut; SR, segmental rods.
Fig. 1 in The earliest annelids: Lower Cambrian polychaetes from the Sirius Passet Lagerstätte, Peary Land, North Greenland
Fig. 1. Locality map of North Greenland (A, B), with position of the Sirius Passet Lagerstätte (C) and its simplified geological context.
Fig. 5 in Ordovician polychaeturid polychaetes: Taxonomy, distribution and palaeoecology
Fig. 5. Pattern of relative abundance (%) of polychaeturid polychaetes Pteropelta gladiata and Pteropelta huberti in the Laeva 18 drill core, central Estonia. The counts are based on a total of 572 posterior maxillae (MI), of which 147 belong to polychaeturids. Arrow heads indicate that the ranges continue beyond the interval shown.
Fig. 4 in Ordovician polychaeturid polychaetes: Taxonomy, distribution and palaeoecology
Fig. 4. Sketch map showing selected occurrences of four species of polychaeturid polychaete genus Pteropelta in the Baltic Region. Note that the localities may expose strata of different stratigraphical intervals. The boundary between shallow and deeper shelf facies is tentative; it has shifted in time due to basin infilling and sea level changes. Thus, for instance, the occurrence of P. gladiata in the Ruhnu and Valga drill cores does not infer its relation to deeper shelf settings. All localities are boreholes, unless stated otherwise. For more information about the localities see the on−line catalogue at http://sarv.gi.ee.
Fig. 3 in Ordovician polychaeturid polychaetes: Taxonomy, distribution and palaeoecology
Fig. 3. Stratigraphical distribution of polychaeturids in the Baltic region and also showing the tentative phylogenetic relationship between the different species. The stratigraphical chart is slightly modified from Nõlvak et al. (2006). Abbreviations: Dap., Dapingian; Flo., Floian; H., Hirnantian; Hun. & Bill., Hunneberg and Billingen; Reg., regional; Trem., Tremadocian.
Fig. 1 in Ordovician polychaeturid polychaetes: Taxonomy, distribution and palaeoecology
Fig. 1. Elements of jaw apparatuses of Ordovician polychaeturid polychaete Pteropelta gladiata Eisenack, 1939. A–I. Left MI, all in dorsal view. A. GIT 592−34, sample OM97−5, Väike−Pakri Cliff, Estonia, Kunda Stage, Darriwilian. B. GIT 592−35, sample OM97−20, Väike−Pakri Cliff, Estonia, Uhaku Stage, Darriwilian. C. GIT 592−36, sample OM03−51, Viru Mine, Estonia, Kukruse Stage, Sandbian. D. GIT 433−24, sample OM03−51, Viru Mine, Estonia, Kukruse Stage, Sandbian. E. GIT 592−37, sample OM97−116, Väike−Pakri Island, Estonia, Kukruse Stage, Sandbian. F. GIT 592−38, sample OM−205, Vaemla F−364 borehole, 140 m, Estonia, Keila Stage, Sandbian. G. GIT 592−39, sample M96−81, Orjaku borehole, 112.5 m, Estonia, Rakvere Stage, Katian. H. GIT 592−40, sample M96−1, Laeva 18 borehole, 187.45 m, Estonia, Pirgu Stage, Katian. I. LO 10476, sample 04E1−3, Stormyr−2 borehole, 213.65 m, Sweden, Pirgu Stage, Katian. J–Q. Right MI, all in dorsal view. J. GIT 433−25, sample OM03−51, Viru Mine, Estonia, Kukruse Stage, Sandbian, magnified (J1) and reduced to the same scale as O, to show size variation (J2). K. GIT 592−41, sample OM03−51, Viru Mine, Estonia, Kukruse Stage, Sandbian. L. GIT 592−42, sample OM−205, Vaemla F−364 borehole, 140 m, Estonia, Keila Stage, Sandbian. M. GIT 592−43, sample M96−49, Orjaku borehole, 47.62 m, Estonia, Pirgu Stage, Katian. N. GIT 592−44, sample M96−49, Orjaku borehole, 47.62 m, Estonia, Pirgu Stage, Katian. O. GIT 592−45, sample D−102/22, Lelle D−102 borehole, 141.42 m, Estonia, Pirgu Stage, Katian. P. GIT 592−46, sample D−102/49, Lelle D−102 borehole, 146.18 m, Estonia, Vormsi Stage, Katian. Q. LO 10477, sample 04E1−3, Stormyr−2 borehole, 213.65 m, Sweden, Pirgu Stage, Katian. R. Left MI, ventral view, GIT 592−47, sample OM97−5, Väike−Pakri Cliff, Estonia, Kunda Stage, Darriwilian. S. Left MI, left lateral view, GIT 592−48, sample M96−81, Orjaku borehole, 112.5 m, Estonia, Rakvere Stage, Katian. T. Right MI, right lateral view, GIT 592−49, sample M96−81, Orjaku borehole, 112.5 m, Estonia, Rakvere Stage, Katian. U. Apparatus, GIT 592−50, sample M−4711, Suhkrumägi outcrop, Estonia, Kunda Stage, Darriwilian. V. Apparatus, GIT 592−51, sample M−4430, Orjaku borehole, 135.6 m, Estonia, Keila Stage, Sandbian/Katian. W. Basal plate, GIT 592−52, sample M−4711, Suhkrumägi outcrop, Estonia, Kunda Stage, Darriwilian. X. Carriers, GIT 315−34, sample M96−77, Orjaku borehole, 63.8 m, Estonia, Pirgu Stage, Katian. Y. Carriers, GIT 592−53, sample M96−49, Orjaku borehole, 47.62 m, Estonia, Pirgu Stage, Katian. SEM micrographs, scale bars 100 µm.
Figure 2. Alien spionid polychaetes from Sukhum Bay, Black Sea. A in First occurrence of the invasive alien species Streblospio gynobranchiata (Rice & Levin, 1998) and Polydora cornuta Bosc, 1802 (Polychaeta: Spionidae) on the coast of Abkhazia (Sukhum Bay, Black Sea)
Figure 2. Alien spionid polychaetes from Sukhum Bay, Black Sea. A – general view of Streblospio gynobranchiata (female, length 6.35 mm), B,C – Polydora cornuta morphology (fifth chaetiger): major spines with tooth (at) and companion chaetae (bc). Scale bars: 10 μm.
Fig. 5 in A symbiotic association of a boring polychaete and an echinoid from the Late Cretaceous of Germany
Fig. 5. Schematic sketch of the echinoid / polychaete interaction and the development of a Caulostrepsis boring. A. Position of the commensal polychaete on the sheltered basal side (plastron) of the echinoid, taking advantage of the hosts ciliary current and sediment resuspension due to locomotion. B. A polydorid polychaete producing an initial shallow depression on the test surface. C. The polydorid progressively deepens the excavation; the presence of a mucus−bound infill between the limbs as it is known for some Recent polydorids, is hypothetical. D. Abandoned trace and regeneration texture developed by the living echinoid skeletal tissue. The mode of penetration is based upon Söderström (1923) and Blake and Evans (1973).
Fig. 3 in A symbiotic association of a boring polychaete and an echinoid from the Late Cretaceous of Germany
Fig. 3. SEM images of a latex cast prepared from the trace−bearing plastron area of the Echinocorys ovata (Leske, 1778) echinoid (Early Maastrichtian; "Klementelvitz" quarry, Rügen Island, N Germany). A. Traces # 4–7 oriented sub−parallel to each other in close proximity to the periproct B. Lateral view of the moderately deep U−shaped trace # 12 showing a distinct regeneration texture in form of primary and miliary tubercles.
Fig. 2 in A symbiotic association of a boring polychaete and an echinoid from the Late Cretaceous of Germany
Fig. 2. Oral surface of an Echinocorys ovata (Leske, 1778) (# MB.E 5713) featuring syn−vivo polychaete boring traces (Early Maastrichtian; "Klementelvitz" quarry, Rügen Island, N Germany). A. Overview of the well preserved oral surface with 27 Caulostrepsis isp. traces, all of which are located in the interambulacral plates of the plastron. B. Schematic sketch of the basal surface indicating the position and number of the traces and the areas enlarged in C and D. C. Close−up of several traces in close proximity of the periproct. D. Close−up of several traces illustrating their variability in length, boring depth and curvature. Note the prominent regeneration texture exhibited by all traces.
Fig. 4. A in A symbiotic association of a boring polychaete and an echinoid from the Late Cretaceous of Germany
Fig. 4. A. Recent Polydora sp. boring traces recorded in an artificial limestone substrate deployed in the Swedish Kosterfjord area during a bioerosion experiment. B. SEM image of an epoxy resin cast of an initial syn−vivo Caulostrepsis isp. boring taken from a Littorina littorea gastropod shell. C. The spionid polychaete Polydora sp. isolated from a bivalve shell. (Recent material stored at the Institute of Palaeontology, Erlangen).
Fig.1 in A symbiotic association of a boring polychaete and an echinoid from the Late Cretaceous of Germany
Fig.1. Map of Rügen Island (N Germany) in the southern Baltic Sea and the location of the chalk pit "Klementelvitz", where the Echinocorys in question was sampled in Early Maastrichtian strata.
Fig. 7. Polychaete borings from Nefiach, Pliocene. A in Bioerosion in shell beds from the Pliocene Roussillon Basin, France: Implications for the (macro)bioerosion ichnofacies model
Fig. 7. Polychaete borings from Nefiach, Pliocene. A. Single specimen of Caulostrepsis taeniola on an oyster valve, JMC−UB/I−0104. B. Oyster valve with numerous Caulostrepsis taeniola borings arranged following growth lines (B1) and detail of the borings (B2), JMC−UB/I−0105. C. Maeandropolydora sulcans in a pectinid shell, JMC−UB/I−0096. Scale bars 10 mm.
Linked collectors and determiners for: Mesoparasitic copepods (Copepoda: Cyclopoida) associated with polychaete worms in European seas.
Natural history specimen data linked to collectors and determiners held within, "Mesoparasitic copepods (Copepoda: Cyclopoida) associated with polychaete worms in European seas". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/a72a13f8-f366-41db-835b-4b42169fd25b">https://bionomia.net/dataset/a72a13f8-f366-41db-835b-4b42169fd25b</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/a72a13f8-f366-41db-835b-4b42169fd25b">https://gbif.org/dataset/a72a13f8-f366-41db-835b-4b42169fd25b</a>. Formatted as a Frictionless Data package.
Data from: Devonian agglutinated polychaete tubes: all in all it's just another grain in the wall
<p>SI dataset related to the 3D reconstructions presented in "Devonian agglutinated polychaete tubes: all in all it’s just another grain in the wal", including:</p> <ul> <li>Movie S1 - 3D model animation of <em>Annulitubus mutveii</em> (mpg format).</li> <li>X-Ray microtomography data (virtual stack) of specimen.</li> <li>The files generated during the acquisition (restore.macro) and reconstruction (.xml) steps.</li> </ul>
Figure 3 in A new polychaete genus and species of the Kongsfjorden, Spitsbergen, Svalbard
Figure 3. Glyphochaeta laudieni gen sp. n., light micrographs. (A) Sagittal section through chaetiger 14 and 15 with glandular organ in chaetiger 14 and grooved spine in chaetiger 15; (B) sagittal section through chaetiger 14 with glandular organ associated with grooved spine. Scale bars: 30 mm. coe, coelom; g, gut; gl, glandular organ; sp, grooved spine.
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