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Sphaeroma papillae

Sphaeroma papillae
Billy Joel Park and Boat Ramp, Cold Spring Harbor, Suffolk County, New York, USA
January 1, 2021
Marked up to show the main identifiing features. There are only 3 specie of Sphaeromatids this far north, with Cassidinidea ovalis being ruled out by the uropod rami being the same length and Sphaeroma quadridentatum having a serrated margin to the uropod exopods and no bumps on the telson

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Sphaeroma papillae Sphaeroma papillae