PING QU’s research while affiliated with Hebei University and other places

... Atypus also resembles Calommata by having a straight, spike-like embolus and a straight, broad, lobular conductor in males [5] but differs by the distally widened con-ductor, an almost rounded palpal bulb and an acuminate palpal cymbium in males ( Figure 3E,G-K) (vs. a slender conductor, irregular palpal bulb and truncated palpal cymbium in Calommata) (see figure 6f in Li et al. 2022 [1]); and by receptacula without distinct granules in females ( Figure 4) (vs. receptacula with granules, overall like cauliflowers in Calommata (see figure 7f-g in Li et al. 2022 [1] Figure 3E,G-K with Zhu et al. 2006: figures 108-110 [17]) but can be distinguished by the presence of a wide triangular space between the embolus and conductor in lateral views ( Figure 3H-K), the first pair of sigilla being obviously larger than the second, and the fourth pair being oval and oriented vertically ( Figure 3D) (vs. no apparent space between the embolus and conductor in lateral views, the first and second pairs of sigilla almost equal in size, and the fourth pair nearly top-shaped and inclined in A. tibetensis) (see figures 107-110 in Zhu et al. 2006 [17]). ...

Reference:

New Species of the Purse-Web Spider Genus Atypus Latreille, 1804 from Southern China (Araneae, Atypidae), with the General Natural History of Atypus Spiders