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39 results for “Sternaspis”
Figure 3 in Record of the non-indigenous species Sternaspis aff. nana Zhadan, Tzetlin & Salazar-Vallejo, 2017 (Annelida: Sternaspidae) in the Southwest Atlantic Ocean
Figure 3. Sternaspis aff. nana collected in Suape Harbor (Pernambuco, Brazil). Detail of Introvert hooks of the first chaetiger.
Figure 2 in Record of the non-indigenous species Sternaspis aff. nana Zhadan, Tzetlin & Salazar-Vallejo, 2017 (Annelida: Sternaspidae) in the Southwest Atlantic Ocean
Figure 2. Sternaspis aff. nana collected in Suape Harbor (Pernambuco, Brazil). (A) Detailed view of the margin of abdomen wall. White arrows showing pre-shield capillary chaetae; (B) Ventrocaudal shields. Black dotted showing shield plates nearly square.White arrows showing fascicles containing only one thick chaeta each, black arrow showing fan corners extended.
Figure 1 in Record of the non-indigenous species Sternaspis aff. nana Zhadan, Tzetlin & Salazar-Vallejo, 2017 (Annelida: Sternaspidae) in the Southwest Atlantic Ocean
Figure 1. Sternaspis aff. nana collected in Suape Harbor (Pernambuco, Brazil). (A) Ventral view.White arrows showing genital papillae; (B) Dorsal view; (C) Detailed ventral view of abdomen (pre-shield). Black arrows showing long filiform papillae and white arrows showing genital papillae.
FIGURE 4. Sternaspis sendalli n in Three new polar species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae)
FIGURE 4. Sternaspis sendalli n. sp. A–C. Holotype (BMNH 1930.10.8.2372–2400), A. Complete specimen, ventral view, B. Anterior end, left side view, C. Same, ventro-caudal shield, frontal view, D–F. Smaller paratype (BMNH 1930.10.8.2372–2400p), D. Ventro-caudal shield, frontal view, smaller one, E. Ventro-caudal shield, frontal view, medium one, F. Ventro-caudal shield, larger one. Scale bars. A: 1.7 mm, B, E: 1.1 mm, C: 0.8 mm, D: 0.9 mm, F: 1.2 mm.
FIGURE 3. Sternaspis monroi n in Three new polar species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae)
FIGURE 3. Sternaspis monroi n. sp. A–B. Holotype (BMNH 1930.10.8.2372–2400R), A. Complete specimen, ventral view, B. Ventro-caudal shield, frontal view, C–G. Several paratypes (BMNH 1930.10.8.2372–2400R paratypes), C. Complete specimen, ventral view, D. Ventro-caudal shield, E. Another paratype, anterior end, oblique frontal view, F. Same, ventrocaudal shield, frontal view, G. Another paratype, ventro-caudal shield, frontal view. Scale bars. A: 1.6 mm, B, D: 0.8 mm, C: 1.2 mm, E: 0.6 mm, F: 1 mm, G: 1.4 mm.
FIGURE 2. Sternaspis buzhinskajae n in Three new polar species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae)
FIGURE 2. Sternaspis buzhinskajae n. sp. A–D.Two paratypes (CAS 19372), A. Complete specimen, ventral view, B. Closeup, ventro-caudal shield, C. Complete specimen, ventral view, D. Same, ventro-caudal shield, frontal view, E–F. Paratype (CAS 22618), E. Anterior end, frontal view, F. Ventro-caudal shield, frontal view. Scale bars. A: 1.4 mm, B, D: 1.1 mm, C: 2.1 mm, E: 0.8 mm, F: 1 mm.
FIGURE 5. Sternaspis sendalli n in Three new polar species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae)
FIGURE 5. Sternaspis sendalli n. sp., several juvenile specimens (USNM 56108), A. Smallest, ventral view, B. Two slightly larger specimens, ventral view, C. Ventro-caudal shield, frontal view, smaller specimen in B, D. Ventro-caudal shield, frontal view, larger specimen in B, E. Largest specimen, ventral view, F. Same, introvert hooks partly exposed, G. Same, ventro-caudal shield, frontal view. Scale bars. A: 0.7 mm, B: 1.3 mm, C: 0.2 mm, D: 0.4 mm, E: 1.7 mm, F: 0.3 mm, G: 0.5 mm.
FIGURE 1. Sternaspis buzhinskajae n in Three new polar species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae)
FIGURE 1. Sternaspis buzhinskajae n. sp., holotype (CAS 9853). A. Complete specimen, ventral view (arrow points to genital papilla), B. Frontal view of anterior end, C. Close-up of ventro-caudal shield. Scale bars. A: 1.5 mm, B: 1.1 mm, C: 0.8 mm.
FIGURE 5 in Two new species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae) from China seas
FIGURE 5. Juveniles of Sternaspis liui sp. nov. A. Five paratypes (A1–A5) from MBM283059; Ventro-caudal shield: B. from specimen A1; C. from specimen A2; D. from Specimen A3; F. from MBM020934, sediment cover not removed; G. from specimen A4; E. Branchial plates, branchiae removed. Scale bars. A: 5 mm, B–G: 1 mm.
FIGURE 4 in Two new species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae) from China seas
FIGURE 4. Sternaspis liui sp. nov. A, B, G: Holotype (MBM283058); C–F, H–I: Five paratypes from MBM283059. A. Complete specimen in ventral view; B. Anterior end in frontal view; C. Introvert hooks of first three chaetigers; D. Branchial plates, branchiae removed; E–I. Ventro-caudal shield in frontal view. Scale bars. A: 5 mm, B: 2 mm, C–H: 1 mm.
FIGURE 3 in Two new species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae) from China seas
FIGURE 3. Juveniles of Sternaspis chinensis sp. nov. A. Four specimens (A1–A4) showing size differences from MBM020989; Ventro-caudal shield: B. from MBM283063; C. from specimen A1; D. from specimen A2; E. from specimen A3; F. from specimen A4. Scale bars. A: 2 mm, B, C: 0.2 mm, D, E: 0.5 mm, F: 1 mm.
FIGURE 2 in Two new species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae) from China seas
FIGURE 2. Sternaspis chinensis sp. nov. A. Holotype (MBM020940) in ventral view; B. Anterior end of paratype (MBM020711) in frontal view; C. Introvert hooks of first three chaetigers of paratype (MBM020711); D. Branchial plates of a paratype (MBM283055), branchiae removed; E–H. Ventro-caudal shield of the holotype (E) and paratypes (F-H, MBM283068, MBM283056 and MBM283057, respectively). A. Scale bars. A: 5 mm, B–G: 1 mm, H: 0.5 mm.
FIGURE 1 in Two new species of Sternaspis Otto, 1821 (Polychaeta: Sternaspidae) from China seas
FIGURE 1. Distribution of Sternaspis chinensis sp. nov. and S. liui sp. nov. in the sea areas of China based on the examined material.
FIGURE 5. Sternaspis spinosa Sluiter, 1882. A in Diversity of Sternaspidae (Annelida: Terebellida) in the South China Sea, with descriptions of four new species
FIGURE 5. Sternaspis spinosa Sluiter, 1882. A. Complete specimen (MBM020948) in ventral view, branchiae removed, arrows pointing to genital papillae; B, C. Anterior end (MBM020947) in ventral and left-lateral view; D. Branchial plates (MBM198745) in rear end view, branchiae removed; E–H. Shield morphology of four specimens (E: MBM020948; F: MBM020947; G: MBM198745; H: MBM020932). Scale bars: 5 mm (A), 0.5 mm (B) and 1 mm (C–H).
FIGURE 2 in Sternaspis chilensis n. sp., a new species from austral Chilean channels and fjords (Annelida, Sternaspidae)
FIGURE 2. Holotype (MNHNCL ANN-15024) paratypes 22 mm long (MNHNCL ANN-15029) ventral view (inset: A´close-up of body papillae from region indicated by arrow), B) anterior end, ventral view; C) close-up of mouth area showing papillae; D) close-up of genital papillae; E) chaetiger 1, left side, bronze chaetae; F) posterior region showing shield, chaetae and branchial region; G) left lateral marginal shield chaetae, showing distribution pattern; H) detail of chaetae from lateral shield; I) branchial plate detail, branchiae removed, paratype.
FIGURE 3. Sternaspis chilensis n in Sternaspis chilensis n. sp., a new species from austral Chilean channels and fjords (Annelida, Sternaspidae)
FIGURE 3. Sternaspis chilensis n. sp. A) paratype, 22 mm long, (MNHNCL- ANN-15025) interbranchial filamentous papillae; B) paratype, 22 mm long, lateral view (MNHNCL- ANN-15025); C) paratype (MNHNCL-ANN-15026); D) paratype (MNHNCL-ANN-15027); E) paratype (MNHNCL-ANN-15028); F) paratype (MNHNCL-ANN-15029), 15 mm long.
Sternaspis scutata µCT scan
<p>µCT scan of a specimen of <em>Sternaspis scutata</em> stained with PTA for one week. Scan and reconstruction were obtained with the following settings:</p> <p>[System]<br> Scanner=SkyScan1272<br> Instrument S/N=15H09112<br> Software Version=1.1.10<br> Source Type=HAMAMATSU_L11871_20<br> Camera Type=XIMEA xiRAY16<br> Camera Pixel Size (µm)=7.4<br> Camera X/Y Ratio=1.0058</p> <p>[Acquisition]<br> Number Of Files= 961<br> Number Of Rows= 1640<br> Number Of Columns= 2452<br> Partial Width=OFF<br> Image crop origin X=0<br> Image crop origin Y=0<br> Camera binning=2x2<br> Image Rotation=-0.00100<br> Optical Axis (line)= 890<br> Camera to Source (mm)=174.64085<br> Object to Source (mm)=82.59950<br> Source Voltage (kV)= 70<br> Source Current (µA)= 142<br> Image Pixel Size (µm)=6.999924<br> Scaled Image Pixel Size (µm)=6.999924<br> Image Format=TIFF<br> Depth (bits)=16<br> Reference Intensity=57000<br> Exposure (ms)=1238<br> Rotation Step (deg)=0.200<br> Use 360 Rotation=NO<br> Scanning position=11.719 mm<br> Frame Averaging=ON (4)<br> Random Movement=OFF (15)<br> Flat Field Correction=ON<br> FF updating interval=120<br> Geometrical Correction=ON<br> Filter=Al 0.5mm<br> Gantry direction=CC<br> Rotation Direction=CC<br> Type of Detector Motion=STEP AND SHOOT<br> Scanning Trajectory=ROUND<br> Number Of Horizontal Offset Positions=1<br> Number of connected scans=3<br> Current scan number=1<br> Number of lines to be reconstructed=1036<br> Scan duration=1h:40m:36s<br> Maximum vertical TS=5.0</p> <p>[Reconstruction]<br> Reconstruction Program=NRecon<br> Program Version=Version: 1.7.1.0<br> Reconstruction engine=InstaRecon<br> Engine version=Version: 2.0.3.7<br> Reconstruction from batch=Yes<br> Postalignment=10.00<br> Connected Reconstruction (parts)=3<br> Sub-scan post alignment [0]=10.000000<br> Sub-scan post alignment [1]=10.000000<br> Sub-scan post alignment [2]=10.000000<br> Sub-scan scan length [0]=1035<br> Sub-scan scan length [1]=1035<br> Sub-scan scan length [2]=1036<br> Used extra shift in X per scan(micron)= 0.000 -1.993 -4.803 <br> Used extra shift in Y per scan(micron)= 0.000 -25.239 -44.091 <br> First Section=63<br> Last Section=3495<br> Reconstruction duration per slice (seconds)=0.349107<br> Total reconstruction time (2071 slices) in seconds=723.000000<br> Section to Section Step=1<br> Sections Count=3433<br> Result File Type=TIF<br> Result File Header Length (bytes)=12<br> Result Image Width (pixels)=2152<br> Result Image Height (pixels)=2056<br> Pixel Size (µm)=6.99992<br> Reconstruction Angular Range (deg)=192.20<br> Use 180+=OFF<br> Angular Step (deg)=0.2000<br> Smoothing=3<br> Smoothing kernel=2 (Gaussian)<br> Ring Artifact Correction=20<br> Draw Scales=OFF<br> Object Bigger than FOV=OFF<br> Reconstruction from ROI=ON<br> ROI Top (pixels)=2282<br> ROI Bottom (pixels)=223<br> ROI Left (pixels)=214<br> ROI Right (pixels)=2369<br> ROI reference length=2452<br> Filter cutoff relative to Nyquist frequency=100<br> Filter type=0<br> Filter type description=Hamming (Alpha=0.54)<br> Undersampling factor=1<br> Threshold for defect pixel mask (%)=0<br> Beam Hardening Correction (%)=54<br> CS Static Rotation (deg)=78.89<br> Minimum for CS to Image Conversion=0.003750<br> Maximum for CS to Image Conversion=0.105554<br> HU Calibration=OFF<br> BMP LUT=0<br> Cone-beam Angle Horiz.(deg)=11.863247<br> Cone-beam Angle Vert.(deg)=7.950323<br> Automatic matching in Z=50<br> Automatic matching in X/Y=50<br> Automatic matching in rotation=0.000000<br> Automatic fusion=1<br> <br> Data size has been reduced by conversion from 16-bit to 8-bit and decreasing the scale of the images.</p>
FIGURE 4 in Sternaspis chilensis n. sp., a new species from austral Chilean channels and fjords (Annelida, Sternaspidae)
FIGURE 4. Type localities of Sternaspis species.
FIGURE 1 in Sternaspis chilensis n. sp., a new species from austral Chilean channels and fjords (Annelida, Sternaspidae)
FIGURE 1. Geographical location of the study area showing collecting stations.
Figure 9 from: Salazar-Vallejo S, Sendall K (2013) Revision of Sternaspis Otto, 1821 (Polychaeta, Sternaspidae). ZooKeys 286: 1-74. https://doi.org/10.3897/zookeys.286.4438
Figure 9 - Sternaspis fossor Stimpson, 1853 A Juvenile (HMCS 9953670), anterior end exposed, ventral view B Another specimen (HMCS 9953671), ventro-caudal shield, frontal view C Neotype (USNM 15543), anterior end exposed, ventral view D Same, ventro-caudal shield, frontal view E–F Ventro-caudal shields of three other specimens (USNM 7872). Bars: A, F 1 mm B 0.6 mm C, E 0.8 mm D 0.7 mm G 1.2 mm.
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