Key to Chinese Species of Atypus 1 Female (females of A. flexus and A. sinesis are unknown)........................................... 2 – Male (males of A. ledongensis are unknown)............................................................. 11 2 Fovea short, strongly recurved and chevron­shaped..................................................... 3 – Fovea wider, fairly straight and not chevron­shaped.................................................... 4 3 Median pair of receptacula digitiform (Figs 19–20); fourth pair of sternal sigilla kidney­shaped (Fig. 18) ............................................................................... A. heterothecus – Median pair of receptacula pyriform, with relatively longer and thicker basal stalks (Figs 102–105); fourth pair of sternal sigilla almost top­shaped (Fig. 101)................... ........................................................................................................ A. tibetensis sp. nov. 4 First pair of sigilla remote from anterior margin of sternum........................................ 5 – First pair of sigilla close to anterior margin of sternum................................................ 6 5 Labium lacking cuspules (Fig. 70); basal stalks of median pair of receptacula longer than two times of diameter of receptacula (Figs 71–74) .............. A. sacculatus sp. nov. – Labium with cuspules (Fig. 41); basal stalks of median pair of receptacula shorter than diameter of receptacula (Figs 42–43) ...................................... A. largosaccatus sp. nov. 6 Median pair of receptacula situated at atrial margin..................................................... 7 – Median pair of receptacula situated in posterior part of atrium.................................... 8 7 Anterior margin of carapace obviously wider than posterior part (Fig. 50); diameter of lateral pair of receptacula almost as long as its basal stalks (Figs 53–55)...................... .................................................................................................... A. ledongensis sp. nov. – Lateral margins of carapace almost parallel (Fig. 111); diameter of lateral pair of receptacula almost two times as long as its basal stalks (Figs 114–116)........................ ............................................................................................................. A. yajuni sp. nov. 8 All four receptacula more or less equal in size, basal stalks indistinct (Figs 90–92)...................................................................................................................... A. suiningensis – All receptacula not equal in size, with obvious basal stalks......................................... 9 9 Basal stalks of median pair of receptacula shorter than diameter of receptacula, lateral patches of pores on atrium larger (Figs 29–33) ............................................... A. karschi – Basal stalks of median pair of receptacula longer than diameter of receptacula, lateral patches of pores on atrium smaller.............................................................................. 10 10 Receptacula larger, their diameters almost equal or slightly larger than diameters of lateral patches of pores on genital atrium (Figs 59–62) ............. A. pedicellatus sp. nov. – Receptacula smaller, with its diameter only 2/5 diameters of lateral patches of pores on genital atrium (Fig. 54) .................................................................... A. baotianmanensis 11 Fovea strongly recurved and chevron­shaped; upper distal corner of conductor slightly extruding and far from tegular process (Figs 108–110) ................. A. tibetensis sp. nov. – Fovea otherwise........................................................................................................... 12 12 Upper distal corner of conductor close to tegular process in prolateral view............. 13 – Upper distal corner of conductor far from tegular process in prolateral view............ 14 13 Upper distal corner of conductor rounded and not pointed in retrolateral view (Fig. 25); sternum longer than wide (Fig. 22) ................................................. A. heterothecus – Upper distal corner of conductor triangular and pointed in retrolateral view (Fig. 38); sternum wider than long (Fig. 35) ................................................................... A. karschi 14 Conductor wide and fan­like (Figs 8–9) ........................................... A. baotianmanensis – Conductor relatively narrow and not fan­like............................................................. 15 15 Upper distal corner of conductor not folded downwards to cover embolus............... 16 – Upper distal corner of conductor folded downwards to cover embolus..................... 17 16 Lateral margins of carapace almost parallel; sternum wider than long (Fig. 111); lower distal corner of conductor triangular (Figs 120–121) .......................... A. yajuni sp. nov. – Anterior part of carapace wider than posterior part (Fig. 80); sternum longer than wide (Fig. 82); lower distal corner of conductor finger­like (Fig. 84) .................... A. sinensis 17 First pair of sigilla remote from anterior margin of sternum...................................... 18 – First pair of sigilla close to anterior margin of sternum.............................................. 20 18 Conductor short, with its base wide and upper distal corner covered basal part of embolus (Figs 13–15) ........................................................................... A. flexus sp. nov. – Conductor relatively longer, its base narrow and its upper distal corner covered distal part of embolus............................................................................................................ 19 19 First pair of sigilla round (Fig. 45); upper distal corner of conductor lacking notch on folded part, lower distal corner of conductor long (Figs 47–48)..................................... ................................................................................................. A. largosaccatus sp. nov. – First pair of sigilla kidney­shaped (Fig. 76); upper distal corner of conductor with notch on folded part, lower distal corner of conductor short (Figs 78–79)..................... ...................................................................................................... A. sacculatus sp. nov. 20 Upper margin of conductor almost straight in prolateral view, lower distal corner finger­like (Fig. 96) ..................................................................................... A. suiningensis – Upper margin of conductor distinctly curved, lower distal corner triangular (Fig. 66).. .................................................................................................... A. pedicellatus sp. nov.

Published as part of Zhu, Ming-Sheng, Zhang, Feng, Song, Daxiang & Qu, Ping, 2006, A revision of the genus Atypus in China (Araneae: Atypidae), pp. 1-42 in Zootaxa 1118 on pages 4-6, DOI: 10.5281/zenodo.5778239