MicroCT scan of the skull of male Trimeresurus popeiorum (NCBS NRC-AA-0010) in lateral (A), dorsal (B) and ventral (C) aspects, showing osteological features of members of the subgenus Popeia. Abbreviations: bo. – basioccipital; c.p. – coronoid process; col. – columella (stapes); comp. – compound bone; d. – dentary; ecp. – ectopterygoid (transversum); f.n.t.f. – foramina of trigeminal and facial nerves; f.op. – foramen opticum; f.ov. – fenestra ovalis; f.sa. – supraangular foramen; fr. – frontal; jug. – jugal; me.f. – mental foramen; mx. – maxilla; nas. – nasal; ot. – otoccipitals; p.r.–a. – retroarticular process; pal. – palatine; par. – parietal; pbs. – parabasisphenoid; pmx. – premaxilla; prf. – prefrontal; pro. – prootics; pt. – pterygoid; q. – quadrate; soc. – supraoccipital; st. – supratemporal; t.q. – trochlea quadrati; vom. – vomer.