Data from: Reconstruction of the multielement apparatus of the earliest Triassic conodont, Hindeodus parvus, using synchrotron radiation X-ray micro-tomography

Earliest Triassic natural conodont assemblages preserved as impressions on
bedding planes occur in a claystone of the Hashikadani Formation, which is
part of the Mino Terrane, a Jurassic accretionary complex in Japan. In
this study, the apparatus of Hindeodus parvus is reconstructed using
synchrotron radiation micro-tomography (SR–μCT). This species has six
kinds of elements disposed in 15 positions forming the conodont apparatus.
Carminiscaphate, angulate, and makellate forms are settled in pairs in the
P1, P2, and M positions, respectively. The single alate element is
correlated with the S0 position. The S array is a cluster of eight
ramiforms, subdivided into two inner pairs of digyrate S1–2 and two outer
pairs of bipennate S3–4 elements. The reconstruction is similar to a
well-known ozarkodinid apparatus model. In addition, the μCT images show
that the ‘anterior’ and ‘posterior’ processes of the S1–2 elements faced
the caudal and rostral ends of the living conodont body, respectively.