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Belgian Continental Shelf 2005 4 October 2005
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lateral views
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Sechelt Rapids, British Columbia
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A picture of the sea urchin Strongylocentrotus droebachiensis (O. F. Müller, 1776) taken in Kejimkujik Seaside Adjunct (43°49’55.87”N 64°50’10.11”N), Nova Scotia, Canada on 09 July 2017.
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Picture taken in Western Head (43°59’30.14”N 64°39’37.85”W), Nova Scotia, Canada on 22 August 2017.
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Sea urchins captured in Quebec (St. Lawrence Estuary).
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Normally green, this is a red variant of the common sea urchin from Mingan region, Quebec (courtesy: DFO-P. Goudreau).
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Close-up of a common (green) sea urchin from St. Lawrence Estuary.
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Green Sea Urchin
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Sea urchins from a DFO trawl survey in the St. Lawrence. May be reported to the genus as they are difficult to distinguish from 'green' sea urchins (S. droebachiensis).
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off Damnoni, Crete, Greece ca. 12 m depth 35°10'15.4"N 24°24'37.6"E
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Phormosoma placenta (aboral view of naked test), collected off the Bahamas, North Atlantic Ocean, from a depth of 247 m.
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Specimen from R/V ‘Akademik Kurchatov’ cruise 37, station 3787. A, aboral surface. B, oral surface. C, anterior surface. D, posterior surface. E, right side. from Saucède, T., Mironov, A. N., Mooi, R. & David, B. 2009. The morphology, ontogeny, and inferred behaviour of the deep-sea echinoid Calymne relicta (Holasteroida). Zoological Journal of the Linnean Society 155, 630-648.
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Apical system plate architecture of Calymne relicta (MCZ 8571) from R/V ‘Atlantis’ cruise 24, station 122, anterior towards top of page, interambulacral plates shaded, apical plates labelled according to Lovén’s system. A, adult specimen approximately 30 mm long. B, juvenile specimen (lacking gonopores) 11.3 mm in test length. from Saucède, T., Mironov, A. N., Mooi, R. & David, B. 2009. The morphology, ontogeny, and inferred behaviour of the deep-sea echinoid Calymne relicta (Holasteroida). Zoological Journal of the Linnean Society 155, 630-648.
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Plate architecture of Calymne relicta. For each, the fasciole is indicated by bands of small, open circles, the interambulacra are shaded, mouth and anal openings are black, some plate sutures are omitted because they were not visible on the specimen. The plates of the posterior interambulacrum are numbered according to Lovén’s rule. Scale bars are 5 mm long. A, oral surface of adult specimen from R/V ‘Akademik Kurchatov’ cruise 37, station 3787, anterior towards top of page. B, posterior surface of specimen in (A). C, left side of specimen from MCZ 8571, R/V ‘Atlantis’ cruise 24, station 122, position of mouth indicated by dashed line. D, posterior surface of specimen in (C), viewed slightly more from the oral surface than view shown in (B). from Saucède, T., Mironov, A. N., Mooi, R. & David, B. 2009. The morphology, ontogeny, and inferred behaviour of the deep-sea echinoid Calymne relicta (Holasteroida). Zoological Journal of the Linnean Society 155, 630-648.
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Location of spine types on Calymne relicta plotted on specimen from R/V ‘Akademik Kurchatov’ cruise 37, station 3787. For each view of entire specimen, the orientation of the power stroke as suggested by tubercle asymmetry is indicated by the direction of the small lines leading away from the dot. The upper drawing of the entire specimen is an oblique view from the anterior-dorsal, anterior to the right. The lower drawing of the entire specimen is an oblique view from the posterior-ventral, anterior to the right. Shaded bands indicate the position of the fasciole. For each spine drawing (except for the clavule), the image on the left is a ‘frontal’ view, the one on the right is a ‘side’ view. Scale bar at lower right is for the spines, which are all drawn to scale. from Saucède, T., Mironov, A. N., Mooi, R. & David, B. 2009. The morphology, ontogeny, and inferred behaviour of the deep-sea echinoid Calymne relicta (Holasteroida). Zoological Journal of the Linnean Society 155, 630-648.
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Drawings of spines of Calymne relicta, depicted as viewed with transmitted light microscopy. Scale bar at uppermost refers to (A)–(E), at lower left to (F) and (G), at lower right to (H). A, ‘frontal’ view of type L3. B, ‘side’ view of type L3. C, ‘side’ view of type L4. D, ‘frontal’ view of type S1. E, ‘frontal’ view of type S3. F, ‘frontal’ view of miliary. G, ‘side’ view of miliary. H, clavule from fasciole. from Saucède, T., Mironov, A. N., Mooi, R. & David, B. 2009. The morphology, ontogeny, and inferred behaviour of the deep-sea echinoid Calymne relicta (Holasteroida). Zoological Journal of the Linnean Society 155, 630-648.