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COSEWIC Status Reports

  • COSEWIC Assessment and Status Report on the Mountain Sucker Catostomus platyrhynchus in Canada (2011)
    The Mountain Sucker, also commonly known as the Northern Mountain Sucker or the Plains Sucker, is a small (usually < 250 mm fork length) bottom-oriented fish of the western mountainous regions and westernmost Great Plains of North America. The Mountain Sucker has a sub-terminal mouth with characteristic “fleshy bumps” (papillae) on the lips. The body is elongate, cylindrical and somewhat compressed caudally. Molecular genetic data ...
  • COSEWIC Assessment and Status Report on the Nodding Pogonia Triphora trianthophoros in Canada (2011)
    Nodding Pogonia (Triphora trianthophoros) is a small orchid that persists mainly as an underground rootstock, sending up flowering shoots only in favourable years. It forms colonies through asexual reproduction by small tubers formed from the ends of its fleshy roots. The greenish-purple aerial shoots vary in height from 5 to 31 cm. One to several small, alternate, round clasping leaves are attached on the stem from about midway to the base of th ...
  • COSEWIC Assessment and Status Report on the Northern Bottlenose Whale Hyperoodon ampullatus in Canada (2011)
    The status of the northern bottlenose whale (Hyperoodon ampullatus), a beaked whale (family Ziphiidae) of the North Atlantic, was assessed for COSEWIC by Reeves et al. (1993), and no listing was given. A subsequent report on the population that uses the waters of the Gully, a submarine canyon off the Scotian Shelf, led to this population being placed in the Special Concern category in 1996 (Whitehead et al. 1997a). Since these reports, substantia ...
  • COSEWIC Assessment and Update Status Report on the Northern Bottlenose Whale (Scotian shelf population) in Canada (2011)
    The status of the northern bottlenose whale (Hyperoodon ampullatus), a beaked whale (family Ziphiidae) of the North Atlantic, was assessed for COSEWIC by Reeves et al. (1993), and no listing was given. A subsequent report on the population that uses the waters of the Gully, a submarine canyon off the Scotian Shelf, led to this population being placed in the Special Concern category in 1996 (Whitehead et al. 1997a). Since these reports, substantia ...
  • COSEWIC Assessment and Status Report on the Northern Fur Seal Callorhinus ursinus in Canada (2011)
    The northern fur seal (Callorhinus ursinus, Linnaeus 1758) is a sexually dimorphic species. Mature males exceed the size of females by an average factor of 3.4-5.4, and are black to reddish brown in colour. Females are gray-brown along their dorsal surface, and lighter along their ventral surface.
  • COSEWIC Assessment and Update Status Report on the Northern Fur Seal Callorhinus ursinus in Canada (2011)
    The northern fur seal (Callorhinus ursinus, Linnaeus 1758) is a sexually dimorphic species. Mature males exceed the size of females by an average factor of 3.4-5.4, and are black to reddish brown in colour. Females are gray-brown along their dorsal surface, and lighter along their ventral surface.
  • COSEWIC Assessment and Status Report on the Olive Clubtail Stylurus olivaceus in Canada (2011)
    The Olive Clubtail is a dragonfly in the clubtail family. Adults are 56-60 mm long, have widely separated eyes and the tip of the abdomen, especially in males, is swollen; the wings are clear. The thorax is grey-green with broad, brown shoulder stripes and the black abdomen bears a yellow mark on the top of each segment and has yellow on the sides. The elongate larvae are distinguished by vestigial burrowing hooks on the tibiae (middle of front l ...
  • COSEWIC Assessment and Status Report on the Olympia Oyster Ostrea lurida in Canada (2011)
    The Olympia Oyster, Ostrea lurida (previously Ostrea conchaphila), is a small oyster with a shallowly cupped lower (left) shell and a flat upper (right) shell that fits within the margins of the lower shell. The maximum size is approximately 90 mm diameter, though most individuals are smaller. They are often attached to hard substrate, but may occur unattached or in clusters with other individuals. The shell is more or less elliptical in outline ...
  • COSEWIC Assessment and Status Report on the Oregon Spotted Frog Rana pretiosa in Canada (2011)
    The Oregon spotted frog, Rana pretiosa, is brown to reddish brown with black halos spread over its head and back. Adults have a mottled belly and yellow to salmon colour wash. Egg masses are laid communally in tight groupings. Single egg masses or groups of two or three egg masses are uncommon. Rana pretiosa and the Columbia spotted frog (Rana luteiventris) are sibling species identifiable through protein analysis and differentiated since 1997. P ...
  • COSEWIC Status Report - Oregon Spotted Frog (2011)
    The Oregon spotted frog, Rana pretiosa, is brown to reddish brown with black halos spread over its head and back. Adults have a mottled belly and yellow to salmon colour wash. Egg masses are laid communally in tight groupings. Single egg masses or groups of two or three egg masses are uncommon. Rana pretiosa and the Columbia spotted frog (Rana luteiventris) are sibling species identifiable through protein analysis and differentiated since 1997. P ...
  • COSEWIC Assessment and Status Report on the Peacock Vinyl Lichen Leptogium polycarpum in Canada (2011)
    The Peacock Vinyl Lichen (Leptogium polycarpum) is a distinctive tree-dwelling “jellyskin” lichen characterized by leafy lobes that are medium-sized lobes and have a dark bluish upper surface bearing numerous button-like fruit bodies containing sexual spores termed ascospores. The production of four spores per ascus is unusual for this genus in which eight is the normal number.
  • COSEWIC Assessment and Status Report on the Pitcher’s Thistle Cirsium pitcheri in Canada (2011)
    Pitcher's Thistle (Cirsium pitcheri) is a perennial herb that bears 2-125 creamy-white flowering heads at the top of a slender white woolly stalk that reaches a height of about 1 m. The leaves are green above, densely woolly, with long white hairs below, and uniformly and deeply pinnately divided with each narrow division tipped by a spine. These characteristics distinguish this species from similar plants with divided leaves. Vegetative plants c ...
  • COSEWIC Assessment and Update Status Report on the Pitcher’s Thistle Cirsium pitcheri in Canada (2011)
    Pitcher's Thistle (Cirsium pitcheri) is a perennial herb that bears 2-125 creamy-white flowering heads at the top of a slender white woolly stalk that reaches a height of about 1 m. The leaves are green above, densely woolly, with long white hairs below, and uniformly and deeply pinnately divided with each narrow division tipped by a spine. These characteristics distinguish this species from similar plants with divided leaves. Vegetative plants c ...
  • COSEWIC Assessment and Status Report on the Purple Twayblade Liparis liliifolia in Canada (2011)
    Purple Twayblade (Liparis liliifolia) is a terrestrial perennial orchid whose leafy flowering shoot develops from a bulbous corm. The plant attains a height of about 25 cm. The flowering stalk of five to 33 flowers arises from the centre of two ovals to elliptic fleshy leaves. Flowers consist of a prominent, broad violet-mauve lip (10-14 mm long) streaked with a fine network of reddish-purple veins. The two lateral petals are linear to thread-lik ...
  • COSEWIC assessment and status report on the Rocky mountain ridged mussel Gonidea angulata in Canada - 2003 (2011)
    The freshwater mussel Gonidea angulata, commonly known as the Rocky Mountain Ridged Mussel, was described by Lea in 1839. The shell is up to 125 mm long, 65 mm high, 40 mm wide, and with shell wall up to about 5 mm thick at mid-anterior; variable in form but typically rather thin, trapezoidal in shape, with posterior margin obliquely flattened and relatively broad, and with a sharp and prominent posterior ridge running from the umbo to the angula ...

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