ECHINODERMATA - KU ScholarWorks - University of Kansas

112 THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS
H. GRANATOCRINIDAE (Mississippian-Permian)
[Genera, see nos. 93-116 1
93. Hydrospire folds three or more on each
side of an ambulacrum 95,96
94. Hydrospire folds two or one on each
side of an ambulacrum 97,98
95. Hydrospire plate present, five pores to
each side plate, pores absent along deltoids
Mesoblastus
96. Hydrospire plate absent, simple pores
present along deltoids 99, 100
97. Hydrospire folds two on each side of
an ambulacrum 101, 102
98. Single hydrospire fold on each side of
an ambulacrum 103, 104
99. Hydrospire folds five on each side of
an ambulacrum
Calycoblastus
100. Hydrospire folds three on each side
of an ambulacrum
Lophoblastus
101. Hydrospire plate present, two pores to
each side plate along radial margins 105, 106
102. Hydrospire plate absent, pores simple 107, 108
103. Pores present along deltoid margins 109, 110
104. Pores absent along deltoid margins ..__Monadoblastus
105. Radials overlapping deltoids, interradial
sutures even, calyx base convex .. Tanaoblastus
106. Radials overlapping deltoids except at
adorai tip where overlap is reversed, interradial
sutures indented, calyx base
flat to concave
Cry ptoblastus
107. Deltoids without coronal process .. Carpenterob/astus
108. Deltoids with coronal process 111, 112
109. One pore to each side plate along deltoid
margins 113,114
110. Two pores to each side plate along deltoid
margins 115,116
111. Deltoids short, overlapped by radials .. Cribroblastus
112. Deltoids long, overlapping radials Heteroblastus
113. Deltoids short, overlapped by radials Poroblastus
114. Deltoids long, overlapping radials Monoschizoblastus
115. Calyx large, radials overlapping deltoids
Granatocrinus
116. Calyx small, radials abutting against
deltoids
Ptychoblastus
I. NUCLEOCRINIDAE (Devonian)
[Genera, see nos. 117-120]
117. Oral plates five, generally wide, with
cryptodeltoids closely adjacent to each
other externally on adorai side of anal
opening Nucleocrinus
118. Oral plates more than five, calyx generally
elongate or oval, with externally
visible plate between adorai tips of
cryptodeltoids 119, 120
119. Calyx oval, with 18 to 21 oral plates Elaeacrinus
120. Calyx elongate oval, with six or seven
oral plates
Placoblastus
J. SCHIZOBLASTIDAE (Mississippian-Permian)
[Genera, see nos. 121-124]
121. Spiracles near oral opening 123, 124
122. Spiracles well separated from oral
opening at aboral corners of deltoids Acentrotremites
123. Lancet covered by side plates, deltoids
overlapping radials
124. Lancet exposed to full width, radials
overlapping deltoids
Schizoblastus
Deltoblastus
EXPLANATION OF PLATE 39
FIGURE
PAGE
1,2. Ileteroblastus (WM berlandi ETHERIDGE & CARPENTER, topotype,
S3,776, Springer coll., U.S. Natl. Mus.; Lower Carboniferous,
Yoredale (Viséan), near Hexham, Northumberland,
England; interambulacral and ambulacral views
of fragmentary specimen showing long deltoids overlapping
radial plates ( X7.5, X7.8) 76
3-9. Granatocrinus granulatus (RoEmER), Lower Mississippian,
New Providence Formation, Kentucky, Tennessee.
3-5,7. Plesiotypes, S3,751, Springer coll., U.S. Natl. Mus.;
headwaters of Medlock's Creek, 10 miles south of Lebanon,
Marion County, Ky.; 3, oral view of summit showing
eight spiracles and anispiracle around oral opening
(X8); 4, ambulacral view showing side plates completely
covering lancet ( X10.7); 5, "C" ambulacral view of another
specimen showing pores in hydrospire plate marginal
to side plates and lancet ( X4); 7, view of radiodeltoid
suture showing radials overlapping deltoids, (same
specimen as shown in fig. 3) (X8).-6. Topotype,
33,080, Troost coll., U.S. Natl. Mus.; Bedford County,
Tennessee; labelled Granatocrinus cidariformis (after
HAMBACH, 1903, pl. 3, fig. 2, designated Cidaroblastus
granu1aris) (X1).-8. Plesiotype, 127,323, James Conkin
coll., U.S. Natl. Mus.; New Providence Formation
(upper part of Coral Ridge member), east quarry of Coral
Ridge Brick Company yards, Coral Ridge, southwestern
Jefferson County, Kentucky; labelled Orbitremites oppelti;
polished cross section showing one hydrospire fold on each
side of ambulacrum ( X10). 9. Plesiotype, S5,746,
Springer coll., Univ. Michigan; Mason County, Kentucky;
area of radiodeltoid suture showing large rounded spines
of a specimen labelled Schizoblastus granulosus ( X8) 74