Pseudoscorpions

Tyrannochthonius Chamberlin, 1929

Type species: Chthonius terribilis With, 1906

Fauna Portal Genus Number: 1042

(after Edward & Harvey 2008): Species of Tyrannochthonius can be distinguished from those of other genera of the Chthoniidae by the following combination of character states: trichobothrium sb positioned midway between st and b, or nearer to st; trichobothria ib and isb positioned close together in a median or subbasal position on dorsum of chelal hand; chelal hand usually with one large, medial acuminate spine-like seta near the base of the fixed finger, but can be reduced, or absent; chelal hand not distally contricted or 'flask-shaped' and lacks enlarged, heavily sclerotised condyles or condylar apodeme; chelal fingers much longer than hand, with finger length generally 1.6–2.2x hand length; coxal spines generally long, incised for only part of their length, and present exclusively on coxae II; epistome usually small, triangular, and closely flanked by two carapacial setae; the epistome is reduced or absent in some species (particularly troglobites); without distal sensorium near xs of fixed chelal finger.