Global radiolarian zonation for the Pliensbachian, Toarcian and Aalenian

Triassic to Middle Jurassic radiolarians from pelagic cherts in the Nanjō Mountains, Southwest Japan - Part 1. Imajō district

“…In order to determine the age of the radiolarian faunas extracted from the chert samples and described in this report, the zonation schemes proposed by Sugiyama (1992Sugiyama ( , 1997 for the Triassic, by Hori (1990) and Carter et al (1998Carter et al ( , 2010 for the Lower Jurassic, and by Baumgartner et al (1995) and for the Middle Jurassic periods, are primarily applicable. The biostratigraphic ranges that were recently extensively analyzed by O'Dogherty et al (2009) are used for the radiolarian genera listed in Table 2.…”

“…Radiolarian zonation schemes proposed by aftermentioned literatures are primarily adapted in this figure. These zones are arranged in ascending order: TR0 -TR8 for Triassic (Sugiyama, 1997); Pl, Kk, Ec, Te, Mh and Pg for Hettangian -lower Aalenian (Hori, 1990); Cm, Pa, Pb, Ct, Ps, CW, Js for Hettangian -Sinemurian ; 2 -33 for uppermost Sinemurian -Toarcian (Carter et al, 2010); JR3 -JR8 for Middle Jurassic ; UAZ1 -UAZ8 for Middle Jurassic (Baumgartner, 1984;Baumgartner et al, 1995). The examined specimens are included in a broad type (Baumgartner, 1984) or they may belong to Striatojaponocapsa plicarum ssp.…”

“…The fourth segment is lacked. Range: Lower Pliensbachian -middle Toarcian (Carter et al, 2010). fig.…”

“…Square to rectangular pore frames on the post-abdominal segments are linearly arranged. Range: Lower Pliensbachian -lower Toarcian (Carter et al, 2010 fig. 16) Remarks: Genus Teesium consists of a test with cephalis, thorax and large inflated abdomen: one prominent cylindrical horn and two cylindrical arms are attached to top of cephalis and base of abdomen, respectively .…”

Triassic to Middle Jurassic radiolarians from pelagic chertsin the Nanjō Mountains, Southwest Japan – Part 2. Kanmuri Yama district

“…In order to determine the geological age of the radiolarian faunas detected from the chert samples of this report, the zonation schemes proposed by Sugiyama (1997) for Triassic (TR0 -TR8D), by Hori (1990) and Carter et al (1998Carter et al ( , 2010 for Lower Jurassic (UA1 -UA41), and by Baumgartner et al (1995b) and Matsuoka (1995) for Middle Jurassic (UAZ1 -UAZ8), are primarily used. Biostratigraphic ranges of radiolarian genera fully and most-recently analyzed by O'Dogherty et al (2009O'Dogherty et al ( , 2010 are adapted to those of the radiolarian genera listed in Table 2.…”