Fig. 7

Poecilocrinus latealatus (Peck), upper Duck Creek Formation, Mortoniceras rostratum Zone (upper Albian); Saginaw Quarry, Fort Worth, Texas. Axillary second primibrachials (a–f) illustrating range of shape. a M11608; a1 aboral, a2 adoral. b Distal view with the two articular facets to first secundibrachials, M11654. c M11666. d M11650. e M11667. f M11651. First primibrachials illustrating size and shape of bowl on aboral side proximal to cryptosynarthrial facet (g–s). g Aboral-distal view, M11612. h Aboral-distal view, M11615. i Aboral-distal view with particularly wide bowl, M11613. j Aboral-distal view, M11611. k Aboral-distal view, M11614. l Aboral-distal view, M11645 (this ossicle is also figured in Fig. 13a under Roveacrinus peracutus to which it may alternatively belong). m Aboral-distal view with wide bowl, M11644. n Proximal-adoral view, M11610. o Proximal-adoral view with protruding bowl visible adorally, M11643. p Lateral view showing bowl and muscle fossa along edge of cryptosynarthrial facet at right, M11609. q Proximal facet showing wide axial canal and aboral ligament pit below, M11531. r Aboral-distal view of specimen with protruding elliptical bowl, M11647. s Aboral-distal view of specimen with wide protruding bowl, M11646