Hyman L 1931 (citation)- p 130, "The worms were found in flowing streams in the hills in the Black Hills of South Dakota. They were seen crawling actively about on the bottom among and on the stones and resting on the under surface of the stones."....."This species seems to be an unusually active one for planarians are ordinarily, during the daytime at least, concealed on vegetation or under stones, but these were crawling around in plain sight on the bottom of the stream. The streams in which the worms were found contained no vegetation." p 131, "Summary a. The North American representative of the many-eyed triclad genus Polycelis is distinct from European or other members of the genus. Its correct name is Polycelis coronata (Girard), 1891. b. Its distinctive characters are: eyes in a broad short band, several rows wide, extending only a short distance behind the auricles; bursa copulatrix saccular; penis bulb massive and muscular; penis small, unarmed; vasa deferentia entering the cavity of the penis bulb separately and asymmetrically, the left one anterior to the right one; common oviduct opening into the dorsal wall of the small common atrium; terminal part of the bursa stalk highly muscular. c. Distribution: mountain streams, in some cases spring-fed, Wyoming, South Dakota."
Kenk R 1972 (citation)- p 25, "Reproduction sexual and asexual. Inhabits springs and cold creeks in southern Wyoming, Utah, Montana, New Mexico."
Kenk R 1973 (citation)- p 6, 'Polycelis coronata coronata inhabits springs and cold creeks in the western parts of the United States. Beck (1954: 81) indicates that in Utah the species is confined to habitats of low water temperature, not exceeding 10 degrees C., a statement which was confirmed by Braithwaite (1962: 21) and which is valid also for other localities of its geographic range. The species is, therefore, found generally at high altitudes.'
Notes from synonyms
Notes for Polycelis (Polycelis) coronata borealis
Kenk R 1972 (citation)- p 27, "Reproduction sexual and asexual. In springs, cold streams, also in mountain lakes, Alaska, northern Wyoming, Idaho."
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