Lateral ocelli of Recent scorpions (families Chactidae Pocock, 1893; Chaerilidae, Pocock, 1893; Euscorpiidae, Laurie, 1896; Iuridae Thorell, 1876; Pseudochactidae Gromov, 1998; Scorpiopidae Kraepelin, 1905).

<p><b>A.</b><i>Chaerilus variegatus</i> Simon, 1877, ♀ (AMNH), abnormal three-ocellus condition with PLMi. <b>B.</b><i>C. variegatus</i>, ♂ (AMNH [LP 6390]), abnormal three-ocellus condition with ALMa. <b>C.</b><i>C. variegatus</i>, ♂ (AMNH [LP 6389]), Type 2A. <b>D, E.</b><i>Chaerilus chapmani</i> Vachon & Lourenço, 1985, ♀ (AMNH), Type 2A on sinistral side (D), abnormal one-ocellus condition without MLMa (Type 1) on dextral side (E). <b>F.</b><i>Pseudochactas ovchinnikovi</i> Gromov, 1998, subad. ♂ (AMNH), Type 1. <b>G.</b><i>Troglocormus ciego</i> Francke, 1981, holotype ♂ (AMNH), Type 4C. <b>H.</b><i>Protoiurus kraepelini</i> (von Ubisch, 1922), ♀ (AMNH), Type 4C. <b>I.</b><i>Calchas birulai</i> Fet et al., 2009, ♀ (AMNH), Type 4C. <b>J.</b><i>Megacormus gertschi</i> Díaz Najera, 1966, juv. ♂ (AMNH [LP 6474]), Type 4C. <b>K.</b><i>Euscorpius italicus</i> (Herbst, 1800), ♂ (AMNH [LP 10297]), Type 3B. <b>L.</b><i>Troglocormus willis</i> Francke, 1981, ♀ (AMNH), Type 3B. <b>M.</b><i>Chactopsis insignis</i> Kraepelin, 1912, ♀ (AMNH [LP 8420]), Type 4C. <b>N.</b><i>Parascorpiops montana</i> Banks, 1928, lectotype ♂ (MCZ), Type 3A. <b>O.</b><i>P. montana</i>, paralectotype ♀ (MCZ), Type 2A. <b>P.</b><i>Alloscorpiops</i> sp., ♀ (AMNH [LP 11279]), Type 4B. <b>Q.</b><i>Scorpiops feti</i> Kovařík, 2000, ♀ (MCZ), Type 4B. <b>R.</b><i>Euscorpiops kaftani</i> (Kovařík, 1993), juv. ♀ (AMNH [LP 11371]), Type 4B. Abbreviations: ADMi (anterodorsal minor ocellus); ALMa (anterolateral major ocellus); e (eyespot); MLMa (mediolateral major ocellus); PDMi (posterodorsal minor ocellus); PLMa (posterolateral major ocellus); PLMi (posterolateral minor ocellus). Scale bars = 0.1 mm.