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Marrella splendens

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Journal Article
Published: 07 July 2006
Canadian Journal of Earth Sciences (2006) 43 (6): 721-742.
...Diego C. García-Bellido; Diego C. García-Bellido; Desmond H. Collins Abstract Study of over 1000 specimens of Marrella splendens Walcott, 1912 , out of the more than 9000 collected by the Royal Ontario Museum (ROM) since 1975, has produced new information on the anatomy, functional morphology...
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Journal Article
Journal: PALAIOS
Published: 01 October 2014
PALAIOS (2014) 29 (10): 512-524.
.... However, the black stain commonly preserved with the arthropod Marrella splendens is preferentially enriched in Cu due to localized residue in the carbon and minute crystals of chalcopyrite. This is interpreted as indicative of the original chemical composition of a primary biotic fluid, likely blood...
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Journal Article
Journal: PALAIOS
Published: 13 June 2019
PALAIOS (2019) 34 (6): 291-299.
... of the limits on the resolution of anatomical information that may be captured by Burgess Shale-type preservation. Evidence used to infer primary blood chemistry was recently reported from the iconic Burgess Shale fossil Marrella splendens , the first such report from a Cambrian Lagerstätte. Diminutive crystals...
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Image
A )  <b>Marrella</b> <b>splendens</b>  (ROMIP 56757) from the Walcott Quarry with charact...
in > PALAIOS
Published: 13 June 2019
Fig. 1.— A ) Marrella splendens (ROMIP 56757) from the Walcott Quarry with characteristic dark stain overlapping the posterior of the specimen. Like many Burgess Shale fossils, this specimen is cut by bedding plane-perpendicular veins, running from the top center of the image down
Image
<b>Marrella</b> <b>splendens</b>  Walcott 1912  from the Burgess Shale (middle Cambrian s...
in > PALAIOS
Published: 01 October 2014
Fig. 1.— Marrella splendens Walcott 1912 from the Burgess Shale (middle Cambrian series 3, stage 5), Mount Field, British Columbia, Canada (ROM 57579). A ) Flattened carcass on bedding plane with black stain on left side of head and adjacent, anteriormost left side of thorax, as well
Image
<b>Marrella</b> <b>splendens</b>  (ROM 57576).  A ) Flattened complete carcass with black...
in > PALAIOS
Published: 01 October 2014
Fig. 2.— Marrella splendens (ROM 57576). A ) Flattened complete carcass with black stain on right side of thorax and around its posterior (photographed in alcohol under reflected light). B–H ) Key elemental maps using synchrotron-based X-ray fluorescence.
Image
<b>Marrella</b> <b>splendens</b>  (ROM 57578).  A ) Flattened carcass with black stain ar...
in > PALAIOS
Published: 01 October 2014
Fig. 3.— Marrella splendens (ROM 57578). A ) Flattened carcass with black stain around thorax (photographed in alcohol under reflected light). B–H ) Key elemental maps.
Image
<b>Marrella</b> <b>splendens</b>  (ROM 57580).  A ) Flattened carcass, obliquely oriented...
in > PALAIOS
Published: 01 October 2014
Fig. 4.— Marrella splendens (ROM 57580). A ) Flattened carcass, obliquely oriented, with black stain around posterior half of thorax (photographed in alcohol under reflected light). B–J ) Key plus expanded number of elemental maps. Mn  =  manganese; Cr  =  chromium; Ti  =  titanium.
Image
<b>Marrella</b> <b>splendens</b>  Walcott, 1912 . USNM 57674, lectotype; dorsal; no refle...
Published: 07 July 2006
Fig. 4. Marrella splendens Walcott, 1912 . USNM 57674, lectotype; dorsal; no reflection; ×4.5.
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Camera lucida  drawing of the lectotype of  <b>Marrella</b> <b>splendens</b>  USNM 57674A...
Published: 07 July 2006
Fig. 5. Camera lucida drawing of the lectotype of Marrella splendens USNM 57674A, dorsal view. Scale bar = 5 mm. See Appendix  A for abbreviations.
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<b>Marrella</b> <b>splendens</b>  Walcott, 1912 .  (A–B)  ROM 56757A; ventral. (A) overal...
Published: 07 July 2006
Fig. 6. Marrella splendens Walcott, 1912 . (A–B) ROM 56757A; ventral. (A) overall, no reflection; × 6 (see Fig.  7 ). (B) partial; reflection; × 6. (C) ROM 56758A; dorsal; reflection; × 2.9 (see Fig.  8 ). (D) ROM 56760A; ventral; no reflection; × 3.9. (E) ROM 56770B; dorsal
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<b>Marrella</b> <b>splendens</b> , schematic reconstruction of the cephalic shield and fi...
Published: 07 July 2006
Fig. 9. Marrella splendens , schematic reconstruction of the cephalic shield and first body segments in lateral view, showing the disposition of the internal organs (excl. nervous system). See Appendix  A for abbreviations.
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<b>Marrella</b> <b>splendens</b> , schematic reconstruction of the cephalic shield and fi...
Published: 07 July 2006
Fig. 10. Marrella splendens , schematic reconstruction of the cephalic shield and first body segments in dorsal view, showing the disposition of the internal organs (Modified from anterior portion of text-fig. 2 in Whittington 1971 b ). See Appendix  A for abbreviations.
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<b>Marrella</b> <b>splendens</b>  Walcott, 1912 .  (A)  USNM 57762; dorsal; no reflection...
Published: 07 July 2006
Fig. 11. Marrella splendens Walcott, 1912 . (A) USNM 57762; dorsal; no reflection; detail showing broad, thin, second cephalic appendage; × 8.9. (B) ROM 56759B; ventral-oblique; reflection; detail showing setose broad, thin, second cephalic appendage; × 8.6 (see Fig.  12 ). (C) ROM 56762A
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<b>Marrella</b> <b>splendens</b>  Walcott, 1912 .  (A)  ROM 56764; lateral-oblique; low-a...
Published: 07 July 2006
Fig. 13. Marrella splendens Walcott, 1912 . (A) ROM 56764; lateral-oblique; low-angle light from north; overlap of contiguous segments (horizontal arrow), and anteriorly displaced insertion of gill shafts on legs (oblique arrow); × 8.8 (see Fig.  14 ). (B) ROM 56765A; dorsal; no reflection
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<b>Marrella</b> <b>splendens</b>  Walcott, 1912 .  (A, B)  ROM 56769B; ventral; reflectio...
Published: 07 July 2006
Fig. 15. Marrella splendens Walcott, 1912 . (A, B) ROM 56769B; ventral; reflection. (A) overall view, silver bands correspond to circulatory system; × 5.2 (see Fig.  10 ). (B) posterior portion, showing circulatory system, with alimentary canal along sagittal axis; × 12.7. (C) ROM 56768A
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Histograms of the sagittal length of  <b>Marrella</b> <b>splendens</b>  in five levels of...
Published: 07 July 2006
Fig. 17. Histograms of the sagittal length of Marrella splendens in five levels of the Greater Phyllopod Bed. GML, Great Marrella layer; negative values indicate layer’s height in centimetres below the floor of Walcott’s quarry; N , total number of specimens measured in the layer; Y axis
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Diagram showing the the sagittal length of  <b>Marrella</b> <b>splendens</b>  at the five...
Published: 07 July 2006
Fig. 18. Diagram showing the the sagittal length of Marrella splendens at the five levels of the Greater Phyllopod Bed where this parameter was measured ( N = 589). One-way ANOVA test was positive and gave a decrease in size with time.
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Reconstruction of  <b>Marrella</b> <b>splendens</b>  Walcott, 1912  swimming and feeding....
Published: 07 July 2006
Fig. 19. Reconstruction of Marrella splendens Walcott, 1912 swimming and feeding.
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Swimming process of  <b>Marrella</b> <b>splendens</b>  Walcott, 1912 .  (A)  backstroke, ...
Published: 07 July 2006
Fig. 20. Swimming process of Marrella splendens Walcott, 1912 . (A) backstroke, with swimming appendages held perpendicular to dorsoventral plane while moving backward to produce propulsion. (B) recovery stroke, gliding forward with swimming appendages held parallel to dorsoventral plane.