新发现的长吻型离龙(双孔亚纲：离龙目)幼年个体——袖珍蒙山龙,兼论新离龙类的个体发育

袁梦, 李大庆, Daniel T. KSEPKA, 易鸿宇

A juvenile skull of the longirostrine choristodere (Diapsida: Choristodera), Mengshanosaurus minimus gen. et sp. nov., with comments on neochoristodere ontogeny

YUAN Meng, LI Da-Qing, Daniel T. KSEPKA, YI Hong-Yu

Fig. 2 Holotype of Mengshanosaurus minimus (IVPG-T002) from Xintai, Shandong CT model (A, C) and line drawing (B, D) of the skull in dorsal (A, B) and ventral (C, D) views Abbreviations: bo. basioccipital; cod. mandibular condyle; ect. ectopterygoid; ex n. external naris; exo. exoccipital; f. frontal; ipt v. interpterygoid vacuity; j. jugal; la. lacrimal; m. maxilla; n. nasal; p. parietal; pbsh. parabasisphenoid; pl. palatine; pmx. premaxilla; pof. postorbitofrontal; prf. prefrontal; pt. pterygoid; q. quadrate; qj. quadratojugal; so. supraoccipital; sof. suborbital fenestra; sq. squamosal; v. vomer. Scale bars = 5 mm