PTERYGOTIDS  3
CIURCA 050592
This interesting specimen, about 4 inches in length (from the front of the carapace to the last ventral segment preserved), exhibits a large opercular segment (center) bearing the median sex appendage. The pincer shown in Pterygotids 2 belongs to this specimen (050592). Brompton Road Site near Buffalo, New York.
BACK TO PTERYGOTIDS 2

BACK TO SITE INDEX
Eurypterids.net
Acutiramus macrophthalmus-anterior portion with large, buldging eyes. Width of carapace at base, 2.8 cm. CIURCA 051969-1, Phelps Waterlime, Fiddlers Green Formation (Late Silurian), near Spohn Hill (PG) northeast of Cedarville, New York.
BUFFALO, NEW YORK
Acutiramus cummingsi (synonym, buffaloensis)
Late Silurian Williamsville Member, Bertie Group
I discovered the above specimens in the late 1960s in the City of Buffalo.  I couldn't believe it.  During the turn of the century, ie. 1900, the quarries were quite active in Buffalo and that is when many eurypterids were being obtained by local collectors and even quarry workers (who were being paid so specimens could be pre- served in the Buffalo Museus of Science). One of the quarries was being used as a storm sew- er, if you can believe that, and that is where I found this fine specimen.  On the underneath portion, I found the great pincer (ramus) of this great Late Silurian eurypterid.  Sam Ciurca
ABOVE: Pterygotids had their chelercerae developed into formidable 'ppincers' that were, obviously, utilized to capture prey.  To me it is logical, based upon a preditor/prey ratio, that the abundant Eurypterus were chief prey along with the abundant phyllocarids and, certainly, many other smaller animals.  Pterygotids were probably the 'sharks' of their time.  BQ033067-3, CIURCA COLLECTION.
THE HARRIS HILL PTERYGOTID
AT LEFT: A large carapace of a pterygotid collected from the Harris Hill Member of the lower Vernon Formation (Salina Group) at the Wegman's Supermarket at Penfield, New York.  The "X" located on the left side of the carapace may be the impression of a salt crystal (halite).  Most of our eurypterid-bearing units appear to have been formed in hypersaline environments (hence, Salina Group).
BACK TO SITE INDEX