Ethusa popognensis De Angeli, Garassino & Pasini, 2009

Ethusa popognensis De Angeli, Garassino & Pasini, 2009: 175, fig. 7A, B. — Schweitzer et al. 2010: 80; 2021: 3. — Jagt et al. 2015: 882. — De Angeli 2019: 51. — Sasaki 2019: 7829. — Van Bakel et al. 2020: fig. 10.20.

REMARKS

This species from the Upper Miocene (Messinian) of Livorno, Italy, is charaterised by the characters as follows:carapace longitudinally oval and posteriorly wider; dorsal surface sculptured, regions distinct, finely tuberculate in the median part of the gastric, cardiac, hepatic and branchial areas; front produced, with two pairs of triangular teeth separated by a V-shaped depression; anterolateral margins elongated and divergent; posterior margin concave and with a clearly thickened rim. Ethusa popognensis is distinguished mainly by well-developed branchial regions crossed transversely by two granulated ridges, a character shared with ‘ Dorippe ? carpathica ’ (see above) and some other fossil Ethusa .