X-ray microtomography of the late Carboniferous whip scorpions (Arachnida, Thelyphonida) Geralinura britannica and Proschizomus petrunkevitchi Author Garwood, Russell J. Department of Earth and Environmental Sciences, The University of Manchester, Manchester M 13 9 PL, UK; & Science Group, Natural History Museum, London SW 7 5 BD, UK; Author Dunlop, Jason A. Museum fur Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, D- 10115 Berlin, Germany text Journal of Systematic Palaeontology 2023 2180450 2023-04-04 21 1 1 15 http://dx.doi.org/10.1080/14772019.2023.2180450 journal article 10.1080/14772019.2023.2180450 1478-0941 10883731 Proschizomus petrunkevitchi Dunlop and Horrocks, 1996 ( Fig. 1B, E ) 1911 Geralinura britannica Pocock (misidentification in part): 29–30, text-fig. 9. 1913 Geralinura britannica Pocock (misidentification in part); Petrunkevitch: 59. 1949 Geralinura britannica Pocock (misidentification in part); Petrunkevitch: 264–266, figs 157, 265. 1953 Prothelyphonus britannicus (Pocock) (misidentification in part); Petrunkevitch: 97–98. 1955 Prothelyphonus britannicus (Pocock) (misidentification in part); Petrunkevitch: 120, fig. 5. 1961 Prothelyphonus britannicus (Pocock) (misidentification in part); Laurentiaux-Viera & Laurentiaux: 25. 1962 Prothelyphonus britannicus (Pocock) (misidentification in part); Dubinin, fig. 1263. 1980 Prothelyphonus britannicus (Pocock) (misidentification in part); Morris: 45. 1983 Prothelyphonus britannicus (Pocock) (misidentification in part); Brauckmann and Koch: 65, 68. 1985 Prothelyphonus britannicus (Pocock) (misidentification in part); Brauckmann, Koch and Kemper, 22–23. 1991 Prothelyphonus britannicus (Pocock) (misidentification in part); Brauckmann: 43–44. 1996 Proschizomus petrunkevitchi Dunlop and Horrocks : 304–305, figs 2, 3, 5, 17–24. 2003 Proschizomus petrunkevitchi Dunlop and Horrocks ; Harvey: 80. 2007 Proschizomus petrunkevitchi Dunlop and Horrocks ; Dunlop et al.: 167. 2008 Proschizomus petrunkevitchi Dunlop and Horrocks ; Tetlie & Dunlop: 311, fig. 6.6. 2016b Proschizomus petrunkevitchi Dunlop and Horrocks ; Selden et al.: 7. 2019 Proschizomus petrunkevitchi Dunlop and Horrocks ; Muller et al.: 8. Diagnosis. As for the genus. Holotype . NHMUK PI In 7912 ( holotype ), from the British Middle Coal Measures of Coseley near Dudley , Staffordshire , UK . Late Carboniferous (Duckmantian). Description. Detailed descriptions can be found in Petrunkevitch (1949) and Dunlop and Horrocks (1996); supplemented here by novel appendage data recovered through tomography. Total body length (excluding telson) 16 mm . Prosomal dorsal shield undivided, length, 5.8 mm , maximum width 3.8 mm . Pedipalps subchelate, length 6.7 mm . Leg I slender, total preserved length 13.2 mm . Leg II, total preserved length 11.5 mm . Leg III, total preserved length 9.9 mm . Leg IV, total preserved length 14.0 mm. Opisthsoma elongate; length c . 12 mm , maximum width 4.2 mm . Terminal three segments form a postabdomen, length, 2 mm . Telson equivocal.