Fig. 14 in A New and Unusual Aquatic Reptile from the Lockatong Formation of New Jersey (Late Triassic, Newark Supergroup)

Fig. 14. Tentative cladogram of relationships within Drepanosauridae. Characters are: 1, caudal vertebrae with anteroposteriorly elongated, bladelike transverse processes through most of tail and with prezygapophyses of proximal caudals extending anteriorly well beyond centrum and postzygapophyses extending posteriodorsally from neural spine base; 2, postcervical vertebrae with zygophyseal facets generally very close to midline; 3, neural spines very long, especially on caudal vertebrae; 4, dorsal ribs firmly attached to centra; 5, hemal arches or chevrons fused to posterior part of anterior threequarters of caudal vertebrae and much greater in depth than height of the neural spines; 6, pectoral girdle with high and rodlike scapula; and 7, pelvic girdle with high, anteriorly directed blade of ilium. 8, Bifurcate or fenestrate chevrons; 9, distinctly enlarged and modified neural spines in shoulder region; 10, dorsal ribs fused to centra; 11, reduced manual and pedal phalangeal formula; 12, ''opposable'' digit I on pes; 13, giant ungual phalanx on manual digit II; 14, extremely deep tail. Note that Dolabrosaurus has no apparent unique derived characters. Dotted lines indicate less favored relationship indicated by character 10.