Found by Applied Ecological Sciences on the shoreline of Sycamore Island in May 2008
Obliquaria reflexa is considered extirpated in PA, and this looks like a fresh shell. I'll ask a malacologist to look at this photo.
Beth Meyer, a malacologist for the PA Natural Heritage Program, has confirmed this identification. She had heard of your record, but had not seen the photos. I would say you've rediscovered this species in PA! The shell looks so fresh that I assume it was recently alive, but it is hard to be certain, and I will defer to the malacologists on whether this counts as an extant population. Were there any soft tissues in the shell when you found it? And was this the only one? I have also heard a rumor that this species was found recently at the Ohio River Islands National Wildlife Refuge.
Where is the shell now? This is an important specimen, so I would like to see it deposited in a museum. The Carnegie Museum of Natural History has a great malacology collection, and would be a good place for this specimen to go.
This is also the first PA rare species record that I have gleaned on iNaturalist, proving the value of this website for gathering conservation data.
Pete, I'm in love with this application. We are in the process of installing some interpretive signs on Sycamore Island, and plan to post the link to the website and application directly onto them.
Could I get your e-mail? or a better way to contact you, I'm email@example.com we'll be in touch.
Typing directly from our management report, the specimen was observed between August 17- September 9, 2010, by Applied Ecological Services, inc. In that time span 19 shells were observed and they reported:
"Not only were relatively fresh shells (paired) found on the island, they were located on seven different occasions over a full year, totaling 19 shells, suggesting an existing nearby population... More recent studies revealed threehorn wartyback just three mile north of Sycamore Island within the Allegheny River, suggesting the re-colonization/dispersal of this species from north to south within the river."
I also need to apologize for posting an incorrect date on my original observation. I didn't realize that they had given us a specific date in their report.
The data quality assessment is a summary of an observation's accuracy. All
observations start as "casual" grade, and become
"needs ID" when
Observations become "research grade" when
Observations will revert to "casual" if the above conditions aren't met or the community agrees
iNaturalist.org shares licensed observation data with
several data partners so your data can be more accessible to
scientists and other researchers.
If you'd like us to share your observations with data partners, make
sure you've chosen to license your observations with a Creative
This observation has been incorporated into the following external websites:
Terms of Service