@article {1683, title = {Freshwater Triclad Planarians (Turbellaria) from Plummers Island, Maryland}, journal = {Bulletin of the Biological Society of Washington}, volume = {15}, year = {2008}, note = {doi: 10.2988/0097-0298(2008)15[11:FTPTFP]2.0.CO;2}, month = {2008/05/01}, pages = {11 - 12}, publisher = {Biological Society of Washington}, abstract = {

Five species of freshwater triclad planarians were found on Plummers Island and the adjacent mainland property, Montgomery County, Maryland. One species (Dugesia [G.] tigrina) occupying the Potomac River and a tributary, is tolerant of degraded habitat. The other four occupy vernal pools (Hymanella retenuova and Phagocata velata) or spring-seeps (Phagocata morgani and Paraplanaria dactyligera) and appear to be indicators of high quality aquatic habitat. These five species represent 36\% of the total known Maryland fauna of 14 species.ABSTRACT Five species of freshwater triclad planarians were found on Plummers Island and the adjacent mainland property, Montgomery County, Maryland. One species (Dugesia [G.] tigrina) occupying the Potomac River and a tributary, is tolerant of degraded habitat. The other four occupy vernal pools (Hymanella retenuova and Phagocata velata) or spring-seeps (Phagocata morgani and Paraplanaria dactyligera) and appear to be indicators of high quality aquatic habitat. These five species represent 36\% of the total known Maryland fauna of 14 species.

}, isbn = {0097-0298}, url = {http://dx.doi.org/10.2988/0097-0298(2008)15[11:FTPTFP]2.0.CO;2}, author = {Norden, Arnold W.} } @article {350, title = {The morphology and life-history of Hymanella retenuova, a new species of triclad from New England}, journal = {American Midland Naturalist}, volume = {26}, year = {1941}, pages = {85-97}, abstract = {

HYMANELLA (Planariidae) is defined and one species, H. retenuova, is described from vernal ponds and a spring-fed swampy stream in Seekonk, Massachusetts. In vernal ponds the species is present during the winter and spring and becomes sexually mature. The fully formed, stalkless egg capsules are retained in the body of the parent worm for a period before being deposited. In vernal ponds in nature these egg capsules apparently remain dormant during the summer and early autumn to hatch when water is again in the ponds in the late fall or early winter. The capsules resist exptl. attempts to induce their hatching in the early weeks folowing their deposit, but young worms emerge after a resting period of some 2 months or more. The species is markedly protandrous, and in some morphological and ecological features shows similarities to spp. of Phagocata and Curtisia.

}, url = {http://www.jstor.org/discover/10.2307/2420756?uid=3737952\&uid=2129\&uid=2\&uid=70\&uid=4\&sid=21101798214351}, author = {Castle, W.E.} } @article {351, title = {The fresh-water triclads of Michigan}, journal = {Miscellaneous publications / University of Michigan, Museum of Zoology}, volume = {60}, year = {1944}, pages = {1-44}, url = {http://deepblue.lib.umich.edu/bitstream/handle/2027.42/56305/MP060.pdf?sequence=1}, author = {Roman Kenk} } @article {81, title = {An annotated checklist of the freshwater Tricladida of the Nearctic and Neotropical Regions}, journal = {Canadian Journal of Zoology}, volume = {47}, number = {1}, year = {1969}, pages = {59-64}, chapter = {59}, doi = {10.1139/z69-013}, author = {Ian R. Ball} }