Proschizomus petrunkevitchi Dunlop and Horrocks, 1996

Garwood, Russell J. & Dunlop, Jason A., 2023, X-ray microtomography of the late Carboniferous whip scorpions (Arachnida, Thelyphonida) Geralinura britannica and Proschizomus petrunkevitchi, Journal of Systematic Palaeontology (2180450) 21 (1), pp. 1-15 : 10

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.

Figures

Figure 1. A, reconstruction of a paratype of Geralinura brittanica (NHMUK PI In 31265) in dorsal view. B, expanded view of the dorsal anterior of G. brittanica with the median eyes outlined. C, photograph of G. brittanica paratype, part. D, photograph of G. brittanica paratype, counterpart. E, right chelicera of G. brittanica. F, left pedipalp of G. brittanica. G, G. brittanica in frontal view. Abbreviations: 1–4, legs 1–4; Ap, apophysis; Fe, femur; Fl, flange; LK, lateral keel; ME, median eyes; Pa, patella; Pp, pedipalps; Ta, tarsus; Ti, tibia; Tr, trochanter. Scale bars: A–D = 5 mm; E, F = 1mm; G = 2 mm.