Page 319 - Introduction to Paleobiology and The Fossil Record

(c)
(b) (d)

(a)
(e)

(f)

(j) (h)

(i) (g)
(k)

(l)

(m) (n) (o)
Figure 12.7 Representatives of the main orders of non-articulates and articulates. Non-articulates:
(a) Pseudolingula (Ordovician lingulide), (b) Nushibella (Ordovician siphonotretide), (c) Numericoma
(Ordovician acrotretide), (d) Dinobolus (Silurian trimerellide) and (e) Crania (Paleogene craniide).
Articulates: (f) Sulevorthis (Ordovician orthide), (g) Rafi nesquina (Ordovician strophomenide), (h)
Grandaurispina (Permian productide), (i) Marginifera (Permian productide), (j) Cyclacantharia (Permian
richthofeniid), (k) Neospirifera (Permian spiriferide), (l, m) Rostricelulla (Ordovician rhynchonellide)
and (n, o) Tichosina (Pleistocene terebratulide). Magnifi cation approximately ×2 (a, e–g, l, m), ×8 (b),
×60 (c), ×1 (d, h–k, n, o). (Courtesy of Lars Holmer (a), Michael Bassett (g), Robin Cocks (j) and
Richard Grant (h, i, k, l).)