Figure 4. BIBE 45854, Alamosaurus sanjuanensis. A, cervical vertebra 10 in dorsal view during preparation, with neural spine removed. B, interpretive line drawing of image in A. Somphospondylus internal structure is visible in broken neural spine laminae in A. Solid grey fill in B indicates broken bone surfaces. Dashed lines indicate approximate borders of anterior condyle and prezygapophyses not attached to centrum at this stage of preparation. Abbreviations: ant, anterior; crib, cervical rib; podl, postzygodiapophyseal lamina; ppr, posterior process of posterior centrodiapophyseal lamina; sdf, spinodiapophyseal fossa; spof, spinopostzygapophyseal fossa; sprf, spinoprezygapophyseal fossa; spol, spinopostzygapophyseal lamina; sprl, spinoprezygapophyseal lamina; tprl, intraprezygapophyseal lamina. Divisions on metre scale bar are 10 cm.