Details of transverse bulge, ‘bottle-shaped’ epidermal glandular shafts and median spine field of the epipharynx of Lithobiidae. A Disphaerobius loricatus; no transverse bulge; consistently two rows of ‘bottle-shaped’ epidermal glandular shafts; narrow and slightly medially widening median spine field BLithobius (Lithobius) pyrenaicus; parallel aligned margins of a single transverse bulge; one row of ‘bottle-shaped’ epidermal glandular shafts; rhomboid and medially widening median spine field CLithobius (Lithobius) fagei; single transverse bulge with parallel margins; more than one row of ‘bottle-shaped’ epidermal glandular shafts laterally; laterally widening median spine field DLithobius (Sigibius) microps; single transverse bulge with non-parallel margins; subequal width of median spine field ELithobius (Lithobius) mutabilis; single transverse bulge with non-parallel margins; one row of ‘bottle-shaped’ epidermal glandular shafts; subequal width of median spine field FLithobius (Monotarsobius) aeruginosus; single transverse bulge with non-parallel margins; one row of ‘bottle-shaped’ epidermal glandular shafts; subequal width of median spine field. bu – transverse bulge, gl – ‘bottle-shaped’ epidermal glandular shafts, msp – median spine field.