. Bulletin. Natural history; Natuurlijke historie. EARLY JURASSIC SEMIONOTID FISHES 95 (D 5 'c — c CO 4_ 1 E c ?. <D o £ CO n c ^ 051 COI. Fig. 38. Tentative cladistic relationships for semionotids from P4 (descriptions for some species unpublished; see McCune 1982) and European semionotids (McCune 1986). Species a through u (also pictured in Fig. 39) are as follows: a = S. kirschi, h = S. redfieldn, c = S. euthemus, d = S. olseni, e = S. virginiae, ( = S. thomsom, g = S. convalis, \\ = S. anosteus, i = S. schaefferi, ] = S. johberryi, k = S. latheticus, 1 = S. melanimus, m = undescribed sp
. Bulletin. Natural history; Natuurlijke historie. EARLY JURASSIC SEMIONOTID FISHES 95 (D 5 'c — c CO 4_ 1 E c ?. <D o £ CO n c ^ 051 COI. Fig. 38. Tentative cladistic relationships for semionotids from P4 (descriptions for some species unpublished; see McCune 1982) and European semionotids (McCune 1986). Species a through u (also pictured in Fig. 39) are as follows: a = S. kirschi, h = S. redfieldn, c = S. euthemus, d = S. olseni, e = S. virginiae, ( = S. thomsom, g = S. convalis, \\ = S. anosteus, i = S. schaefferi, ] = S. johberryi, k = S. latheticus, 1 = S. melanimus, m = undescribed species in S. elegans group, n = undescribed species in S. elegans group, o = S. amplicephalus, p = 5. greenwoodi, c\ = S. fundus, t = S. saginalus, s = S. decoratus, t = S. tenuiceps, and u = S. profundus. Large black bars are synapomorphies. Small black bars are autapomorphies. White represents homoplasies. Primitive character states are not shown. Key to derived character states is as follows: 1, Dorsal ridge scales present, premaxillae with long rostral process, epiotic with posteriorly directed process, lachrymal serially subdivided. 2, Fringing fulcra reduced in number. 3, Suborbitals number greater than one. 4, Basal fin fulcra reduced in number. 5, Dorsal ridge scales laterally undercut. 6, Dorsal ridge scales concave. 7, Dorsal ridge scales with short spines, dorsal ridge scales small relative to flank scales. 8, Dorsal ridge scale spines very narrow and separated distally from base. 9, Anterior dorsal ridge scales enlarged. 10, Anterior dorsal ridge scales even larger. 11, Flank scales serrated. 12, Caudal fin forked. 13, Horizontal flank scale rows reduced in number. 14, Vertical flank scale rows reduced in number. 15, Shape "; 16, Shape "; 17, Shape "; 18-33, Autapomorphic shapes. Reproduced from McCune and others, 1984, Semionotid fishes from the Mesozoic great lakes of North America, p. 27-44. In A. A. Echelle and I. Kornfeld [
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