Ausich et al.—Fort Payne Formation Batocrinidae
concavity where basals meet radials, straight from base of radials to arm openings, outline of calyx at level of arm openings circular (Fig. 9.1). Basal rim formed from elongated transverse nodes of basal
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plates that extend horizontally, sutures flush with surrounding plates. Plate sculpturing variable: types include smooth, transverse nodes only discernable on radials, and transverse nodes discernable on all calyx plates. Basal circlet 21–29% of calyx height. Basal plates three, equal in size, sculpture as noted above. Radial circlet 36–41% of calyx height. Radial plates five, hexagonal, wider than high, sculpture as noted above. Regular interrays not in contact with tegmen; consists of a single plate. Interradial higher than wide, hexagonal. Primanal septagonal, slightly wider than high; plating P-3-
2-1, in contact with tegmen. First primibrachial wider than high, approximately equal in
size to second primibrachial; second primibrachial axillary; additional fixed brachials wider than high; two secundibra- chials; last fixed brachials in tertibrachitaxis, free arm facets subvertical. Tegmen low inverted cone from arm openings to base of
anal tube, with many small plates leading to anal tube (Fig. 9.2); tegmen plates nodose; anal tube shape unknown from Fort Payne material. Free arms 14–15; distal arms unknown from Fort Payne
material.
Materials.—The holotype of Actinocrinus mundulus Hall, 1859a is IGS 1848. The type specimens of junior synonyms are Actinocrinus agnatus Miller, 1892a, holotype, USNM S 795; Batocrinus jucundus Miller and Gurley, 1890a, syntypes, FMNH UC 6259; Actinocrinus lagunculus Hall, 1859a, holo- type, UI X-815, referred specimen, USNM S 798; Batocrinus procerus Miller and Gurley, 1895b, holotype, CMC IP 3238; and Batocrinus similis Hall, 1859a, syntype, UI X 1104. The following are new Fort Payne Formation specimens
from this study USNM 639938–USNM 639939, and CMC IP 76405.
Measurements.—See Supplemental Table 7.
Remarks.—For comparison to other Fort Payne species of Macrocrinus, see remarks of E. casualis.
Macrocrinus strotobasilaris Ausich and Lane, 1982 Figure 9.3, 9.4
1982 Macrocrinus strotobasilaris Ausich and Lane, p. 1355, pl. 2, figs. 1–8; fig. 3.
2013 Macrocrinus strotobasilaris Ausich and Lane; Webster and Webster, p. 1786.
Complete synonymy list in Supplemental Data 2. Types.—The holotype is IU 15126-221.
Diagnosis.—Calyx medium cone shaped, higher than tegmen; basals low; tegmen shape flat inverted cone with few large plates with medium nodes; arm facets subhorizontal.
Occurrence.—The holotype of Macrocrinus strotobasilaris was described from the Edwardsville Formation, Monroe County, Indiana, where it occurred on the Allens Creek delta platform carbonate packstone bank and other delta-platform facies. In the Fort Payne Formation of south-central Kentucky, this taxon is known from the sheetlike packstone facies at Seventy-Six Falls, Wolf Creek/Caney Fork Confluence, 61B, and 61RS.
Description.—Calyx medium cone shape, height to width ratio 0.40–0.80 (mean=0.71), widest at arm openings, slight con- cavity where basals meet radials, straight from base of radials to arm openings, outline of calyx at level of arm openings circular (Fig. 9.3). Basal rim formed from elongated transverse nodes of basal
plates that extend horizontally; sutures flush with surrounding plates. Plate sculpturing variable; types include smooth and transverse nodes on radial plates and central nodes on other calyx plates. Basal circlet 10–40% of calyx height (mean= 24%). Basal plates three, equal in size, sculpture as noted above. Radial circlet 32–52% of calyx height (mean=42%). Radial plates five, hexagonal, generally wider than high with a few higher than wide, sculpture as noted above. Regular interrays not in contact with tegmen, consists of a single plate. Interradial as high as wide, hexagonal. Primanal septagonal, as high as wide, plating P-3-1, in
contact with tegmen. First primibrachial wider than high, approximately equal in
size to second primibrachial; second primibrachial axillary; two secundibrachials, last fixed brachials in tertibrachitaxis; free arm facets subhorizontal. Tegmen low inverted cone from arm openings to base of
anal tube, few plates leading to anal tube; tegmen plates with small central nodes (Fig. 9.4), anal tube shape unknown from Fort Payne material. Free arms 14–17, commonly 16. Distal arms unknown
from Fort Payne material.
Materials.—In addition to the holotype, numerous paratypes were designated (Ausich and Lane, 1982). The following are new Fort Payne Formation specimens from this study USNM 639940–USNM 639944, OSU 54522–OSU 54527, and CMC IP76406–CMC IP76408.
Measurements.—See Supplemental Table 7.
Remarks.—For comparison to other Fort Payne species of Macrocrinus, see remarks of E. casualis. Genus Magnuscrinus Ausich and Kammer, 2010
Type species.—Magnuscrinus yandelli (Shumard, 1858).
Other species.—All species of Magnuscrinus are early Viséan and includeMagnuscrinus cumberlandensis n. sp.;Magnuscrinus kammeri Krivicich et al., 2013;Magnuscrinus praegravis (Miller, 1892a); and Magnuscrinus yandelli (Shumard, 1858).
Diagnosis.—Calyx shape low bowl or flat cone; basal concavity absent; calyx lower than tegmen; calyx plates very
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