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Figure 1.Ovigerous female holotype (6.4 × 4.6) of Lithoscaptus semperi sp. n. (RMNH.Crus.D.56962) A habitus, dorsal view B carapace, lateral view C anterior margin of carapace, ventral view D close-up of antennule E MXP3 F left P1 (cheliped) G left P2 H left P3 I left P4 J left P5. Scale bars 1 mm; A–B, D–E, F–J share scale bars.
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Figure 2.Male allotype (3.6 × 2.5) of Lithoscaptus semperi sp. n. (RMNH.Crus.D.56962) A habitus, dorsal view B carapace, lateral view C anterior margin of carapace, ventral view D close-up of antennule E MXP3 F thoracic sternites G right P1 (cheliped) H right P2 I right P3 J right P4 K right P5. Scale bar 1 mm; A–C, D–E, F–K share scale bars.
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Figure 3.Colour in life of Lithoscaptus semperi sp. n. A–B non-ovigerous female (4.5 × 3.2; RMNH.Crus.D.54258) dorsal view and ventral view C–D male (2.5 × 1.9; RMNH.Crus.D.54258) dorsal view and ventral view E juvenile male (2.0 × 1.6; RMNH.Crus.D.56959) dorsal view F in-situ photograph of dwellings (left male, right female) of Lithoscaptus semperi sp. n. in Trachyphyllia geoffroyi on Lubani Rock reef, Kudat (Malaysia). Photos by BT Reijnen/SET van der Meij.