APPENDIX

Comparative material examined. All specimens are dried skeletons and c&s (cleared and stained) bones. Each number represents an individual specimen.

Silurus glanis: NMNHU-P 1/113, 114, 115, 117, 118, 119, 120, 121, 122, 123, 124, 125, 216, 218 (dried skeletons); NMNHU-P 1/126 (c&s).

Silurus soldatovi: PIN (comparative collection) - quadrate, articular, dentary, hyomandibular, epihyal, ceratohyal, cleithrum, pectoral spine, Weberian centrum (c&s).

Silurus asotus: PIN (comparative collection) - pectoral spine (c&s).

Additional data for comparison were obtained from literature:

Heterobranchus austriacus: pectoral spine (see Thenius, 1952; Weinfurter, 1954; Böhme, 2002).

Parasilurus altus: complete skeleton (see Sytchevskaya, 1989).

Silurus joergi: complete skeleton, isolated bones (see Gaudant, 2015).

Silurus cf. S. soldatovi: isolated bones (see Sytchevskaya, 1989).

Silurus aristotelis: skull, shoulder girdle, pectoral spine (see Kobayakawa, 1989).

Silurus biwaensis: pectoral spine (see Kobayakawa, 1989); cleithrum, praemaxilla, pectoral spine, Weberian centrum (see Kobayakawa and Okuyama, 1994).

Silurus cochinchinensis: skull, shoulder girdle, pectoral spine (see Kobayakawa, 1989).

Silurus glanis: pectoral spine (see Kobayakawa, 1989); skull (see Ünlü et al., 2012).

Silurus grahami: skull, pectoral spine (see Kobayakawa, 1989).

Silurus microdorsalis: skull, shoulder girdle, pectoral spine (see Kobayakawa, 1989).

Silurus triostegus: skull, pectoral spine (see Ünlü et al., 2012).