Revision of the deep-water spider crab genus, Scyramathia A. Milne-Edwards, 1880, with the description of a new species from the Mediterranean and notes on Rochinia A. Milne-Edwards, 1875, and Anamathia Smith, 1885 (Crustacea, Decapoda, Brachyura, Epialtidae)

Dorsal view of P5. A, B. Scyramathia carpenteri (Norman, in Thomson 1873); A. male (41.3 × 34.0 mm) (NHM 1983.449), North Sea; B. ovigerous female (35.8 × 29.0 mm) (NHM 1978.99), Atlantic Ocean; C, D. S. hertwigi Doflein, in Chun 1900; C. male (34.6 × 27.3 mm) (NHM 1924.7.19.1–3), South Africa; D. female (24.5 × 18.4 mm) (SAM-A47872), South Africa; E, S. umbonata (Stimpson, 1871), female (36.7 × 27.9 mm) (NSMT-Cr7178), off Suriname; F–J. S. tenuipes sp. nov.; F. holotype male (33.9 × 26.3 mm) (ICMD288), Mediterranean Sea; G. paratype male (29.7 × 22.0 mm) (ICMD000707), Mediterranean Sea; H. paratype male (32.0 × 25.4 mm) (ZRC 2019.1636), Mediterranean Sea,; I. paratype ovigerous female (31.2 × 24.6 mm) (ICMD000708), Mediterranean Sea,; J. paratype ovigerous female (32.2 × 25.8 mm) (ZRC 2019.1635), Mediterranean Sea.