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668 results for “polychaetes”
Figure 4 in Spatial and temporal variations of soft bottom polychaetes of Sinop Peninsula (southern Black Sea) with new records
Figure 4. Biplot of CCA performed on the total abundance of species and environmental variables recorded in the study area (DO: dissolved oxygen, OM: organic matter, TDS: total dissolved solids, WC: water content, Si: silicate, VFP: very fine pebbles, CS: coarse sand, MS: medium sand, FS: fine sand, VFS: very fine sand, VCS: very coarse silt).
Fig. 5 in Patterns Of Polychaete Communities In Tropical Sedimentary Habitats: A Case Study In South-Western Thailand
Fig. 5. Multivariate analysis output using presence/absence transformed polychaete data: (a) MDS plot showing all sites arranged by habitat, (b) MDS plot excluding Exposed Beach habitat. Habitat abbreviations as in Fig. 2.
Fig. 2 in Patterns Of Polychaete Communities In Tropical Sedimentary Habitats: A Case Study In South-Western Thailand
Fig. 2. Mean density (SE) for polychaetes and macrofauna at each sampled habitat. EB = Exposed Beach, NV = Non-vegetated sediment, SG = Seagrass.
Fig. 1 in Patterns Of Polychaete Communities In Tropical Sedimentary Habitats: A Case Study In South-Western Thailand
Fig. 1. Map of study area showing the location of each sampling site. Site abbreviations: AK = Ao Khoei, KKam = Khlong Kamphuan, KKap = Khlong Kapoe, KKY = Ko Kai Yai, KKN = Ko Kam Nui, KRa = Ko Ra, KThao = Ko Thao, LSon = Laem Son, TN = Thale Nok, TND = Thung Nang Dam, TNDb = Thung Nang Dam beach.
Fig. 4 in Patterns Of Polychaete Communities In Tropical Sedimentary Habitats: A Case Study In South-Western Thailand
Fig. 4. Box and whisker plot of seasonal variation at each habitat and for all habitats considered together. Left-hand side boxes represent dry season sampling; right-hand side boxes represent wet season sampling. Habitat abbreviations as in Fig. 2.
Fig. 4 in Leocrates bitungensis (Hesionidae, Annelida): a new polychaete species from North Sulawesi, Indonesia
Fig. 4. Parapodia and chaetae of Leocrates bitungensis, new species. A, anterior parapodium (chaetiger 3); B, middle parapodium (chaetiger 8); C, posterior parapodium (chaetiger 15); D, close-up of a mid-parapodial neurochaeta (chaetiger 8). Abbreviations: cir = cirrophore; dc = dorsal cirrus; nec = neurochaetae; nel = neuroacicular lobe; neu = neuropodium; noc = notochaetae; nol = notoacicular lobe; not = notopodium; vc = ventral cirrus. Scale bar A, B, C = 200 Mm; D, 25 Mm.
Fig. 2 in Leocrates bitungensis (Hesionidae, Annelida): a new polychaete species from North Sulawesi, Indonesia
Fig. 2. Whole body of Leocrates bitungensis, new species. A, dorsal view; B, ventral view. Scale bar = 1 mm.
Fig. 3 in Leocrates bitungensis (Hesionidae, Annelida): a new polychaete species from North Sulawesi, Indonesia
Fig. 3. Close-ups of Leocrates bitungensis, new species. A, anterior end; B, posterior end. Abbreviations: an = anus; ac = anal cirrus; cp = cirrophore; dc = dorsal cirrus; ey = eye; ft = facial/frontal tubercle; la = lateral antenna; lc = lateral cushion; ma = median antenna; mdj = mid-dorsal jaw; nec = neurochaetae; pa = palp; pdc = prepygidial dorsolateral cirrus; ph = pharynx; pl = pharyngeal lobe; tb = tentacular belt. Scale bar = 0.5 mm.
Fig. 3 in New serpulid polychaetes from the Permian of western Sicily
Fig. 3. Serpulid polychaete "Serpula" calannai sp. nov. (holotype MSNC 4549-33) from the Wordian to upper Permian, "Pietra di Salomone" Limestone, Sicily, Italy. A. Tube fragment before assembling. Growth direction, inferred from the slightly flaring peristomes, marked by an arrow. B. Detail of a peristome and growth lines. C. Longitudinal fracture of tube displaying wall section and inner surface covered by secondary crystals. D. Oblique view of tube showing prominence of ornamentations. E. Detail of C showing layered structure of tube wall, only locally preserved. F. Circular cross section of tube, with relatively thick wall locally showing its likely original layering. All SEM images.
Fig. 2 in New serpulid polychaetes from the Permian of western Sicily
Fig. 2. New serpulid polychaetes from the Wordian to upper Permian, "Pietra di Salomone" Limestone, Sicily, Italy. A. "Serpula" calannai sp. nov. (holotype MSNC 4549-33); general views (A1–A3), cross section of tube, white limestone partly filling lumen (A4). B. "Serpula" prisca sp. nov. (holotype PMC.S5.15.09.2017); general view of anterior end, partially embedded in rock. Arrow indicates growth directions for all tubes.
Fig. 4 in New serpulid polychaetes from the Permian of western Sicily
Fig. 4. Serpulid polychaete "Serpula" prisca sp. nov. (holotype PMC. S 5.15.09.2017) from the Wordian to upper Permian, "Pietra di Salomone" Limestone, Sicily, Italy. A. Central portion of the tube glued together, with only feeble growth lines on its outer surface. B. Tube wall with large secondary calcite crystals pointing to complete recrystallization. C. Close-up of outer surface showing very thin and smooth growth lines. D. Magnification of C, with closely spaced, relatively prominent growth lines, crossed by nearly imperceptible longitudinal striations. All SEM images.
Fig. 1 in Commensalism in the fossil record: Eunicid polychaete bioerosion on Pliocene solitary corals
Fig. 1. Palaeogeographical map of the Western Mediterranean during the Piacenzian (Early Pliocene) showing the location of the basins that have provided the study material: 1, Liguria (NW Italy); 2, Alpes−Maritimes (SE France); 3, Roussillon (SE France); 4, Alt Empordà (Catalonia, NE Spain); 5, Baix Llobregat (Catalonia, NE Spain); 6, Baix Ebre (Catalonia, NE Spain); 7, Níjar−Almería (Andalusia, SE Spain); 8, Vélez−Málaga (Andalusia, SE Spain); 9, Estepona (Andalusia, SE Spain).
Fig. 5 in Commensalism in the fossil record: Eunicid polychaete bioerosion on Pliocene solitary corals
Fig. 5. Recent polychaete Lumbrineris flabellicola (Fage, 1936) infesting alive caryophyllids. Pictures by Alan and Eve Southward, from the Marine Biological Association, UK; reproduced with permission.
Fig. 3 in Commensalism in the fossil record: Eunicid polychaete bioerosion on Pliocene solitary corals
Fig. 3. Polychaete trace fossil Sulcichnus maeandriformis on Flabellum sp. from different Lower Pliocene sites. Pairs of pictures correspond to both sides of a single corallite and show the specular symmetry of the boring. A. Paratype, MMPE/Ic001.003.001, Bizcornil, Estepona. B. Paratype, MMPE/Ic001. 002.001, Velerín, Estepona. C. Holotype, MMPE/Ic001.001.001, Velerín, Estepona. D. Paratype, MMPE/Ic001.004.001, Velerín, Estepona. E. Paratype, MMPE/Ic001.005.001, Velerín, Estepona. F. Paratype, JMC−UB/I−0087, Vila−robau, Alt Empordà. G. JMC−UB/I−0130, Rio Torsero, Liguria. H. JMC−UB/I−0089, Vila−robau, Alt Empordà. I. UG−N−P−0117, Almería−Níjar. Scale bars 10 mm.
Fig. 4 in Commensalism in the fossil record: Eunicid polychaete bioerosion on Pliocene solitary corals
Fig. 4. Examples of the three Sulcichnus ichnospecies. Sulcichnus sigillum on Trochocyathus sp. Pairs of pictures correspond to both sides of a single corallite, showing the specular symmetry of the groove. A. Paratype, MMPE/Ic003.002.001, Arroyo Vaquero, Estepona. B. Paratype, MMPE/Ic003.003.001, Velerín, Estepona. C. Holotype, MMPE/Ic003.001.001, Parque Antena, Estepona. S. helicoidalis on Trochocyathus sp. D. Paratype, MMPE/Ic002.002.001, La Lobilla, Estepona. S. helicoidalis on Flabellum sp. E. Holotype, MMPE/Ic002.001.001, Velerín, Estepona. F. Paratype, JMC−UB/I−0086, Vila−robau, Alt Empordà. G. MGSC−3523, Baix Llobregat. H. MGSC−3524, Baix Llobregat. S. maeandriformis on Ceratotrochus sp., Rio Torsero, Liguria. I. MGPUT−I−001. J. MGPUT−I−002. K. MGPUT−I−003. L. MGPUT−I−004. Scale bars 10 mm.
Fig. 2 in Commensalism in the fossil record: Eunicid polychaete bioerosion on Pliocene solitary corals
Fig. 2. Idealized models of Sulcichnus maeandriformis (A), Sulcichnus helicoidalis (B), and Sulcichnus sigillum (C).
Fig. 7 in Biotic interaction between spionid polychaetes and bouchardiid brachiopods: Paleoecological, taphonomic and evolutionary implications
Fig. 7. Fragments of Bouchardia rosea (Mawe, 1823) shells resulting from the breakage along the surface defined by polychaete tubes.
Fig. 2 in Biotic interaction between spionid polychaetes and bouchardiid brachiopods: Paleoecological, taphonomic and evolutionary implications
Fig. 2. Schematic stratigraphic sections of the studied fossil localities in Bajo de San Julián, Argentina (A) and Cerro Bautista, Uruguay (B), showing the Bouchardia−beds.
Fig. 4. Bioerosion trace Caulostrepsis. A. Specimen DZP−18422 in Biotic interaction between spionid polychaetes and bouchardiid brachiopods: Paleoecological, taphonomic and evolutionary implications
Fig. 4. Bioerosion trace Caulostrepsis. A. Specimen DZP−18422, ventral valve of Bouchardia rosea showing the typical morphology of Caulostrepsis. Note the well−developed central ridge, and the straight morphology of the trace. B, C. Specimens DZP−18423 and 18424, respectively. Note that the galleries are roughly straight, and not enlarged at their distal extremities. The apertural groove (arrow) is well marked. D. Specimen DZP−18425, dorsal valve, showing multiple (arrows), straight traces. E, F. X−ray images of the specimens DZP−18426 and 18427, respectively. Note the straight morphology of unabraded tubes and the apertural groove (arrow) in the specimen DZP−18427. Scale bars 5 mm.
Fig. 6 in Biotic interaction between spionid polychaetes and bouchardiid brachiopods: Paleoecological, taphonomic and evolutionary implications
Fig. 6. Morphology of Caulostrepsis. A, B. Drawings of Caulostrepsis taeniola Clarke, 1908 (A) and Caulostrepsis cretacea (Voigt, 1971) (B), respectively. C. Morphology of Caulostrepsis traces found in Bouchardia rosea shells. Note differences in the cross−sectional morphology between the traces reported here (C) and those documented previously (A, B).
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Annotated Behaviour and Observability Dataset (ABODe)
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