Data from: Camerate and disparid crinoids from the late Kinderhookian Meadville Shale, Cuyahoga Formation of Ohio

Crinoids were first reported from the Cuyahoga Formation in northeastern
Ohio by James Hall in 1863. However, these crinoids have essentially not
been re-examined in detail since the late 18th century. With the restudy
of classical and more recent collections, ten (nine camerate and one
disparid) species-level taxa are recognized from the late Kinderhookian
Cuyahoga Formation, including the camerates Amphoracrinus viminalis (Hall,
1863); Aorocrinus helice Hall, 1863; Aorocrinus meyeri n. sp.;
Aryballocrinus martini n. sp.; Cusacrinus daphne (Hall, 1863);
Platycrinites s.l. contritus (Hall, 1863); Platycrinites s.l. graphicus
(Hall, 1863); Platycrinites s.l. lodensis (Hall and Whitfield, 1875); and
Platycrinites s.l. burki n. sp. In addition, Halysiocrinus sp. is the
first disparid reported from this fauna. Platycrinites s.l. bedfordensis
(Hall and Whitfield, 1875) is designated a nomen dubium. Growth is
evaluated for Aorocrinus helice and Cusacrinus daphne, which had
contrasting development. The Aorocrinus helice calyx was largely not
allometric but the growth of the primaxil plate was, suggesting the arms
may have grown allometrically. In contrast, much of the calyx of
Cusacrinus daphne displayed allometric growth.