Novispathodus, Leu & Bucher & Vennemann & Bagherpour & Ji & Brosse & Goudemand, 2022

Leu, Marc, Bucher, Hugo, Vennemann, Torsten, Bagherpour, Borhan, Ji, Cheng, Brosse, Morgane & Goudemand, Nicolas, 2022, A Unitary Association-based conodont biozonation of the Smithian-Spathian boundary (Early Triassic) and associated biotic crisis from South China, Swiss Journal of Palaeontology (19) 141 (1), pp. 1-61 : 32

Novispathodus n. sp. Z Orchard, 2007

Fig. 20 , I, J, P, AA

*2007 Ns. n. sp. Z; Orchard, p. 96, fig. 2.

2016 Novispathodus ex gr. abruptus (Orchard) ; Komatsu et al., p. 77, figs. 5.6a–c.

2018 Novispathodus abruptus (Orchard) ; Maekawa et al., p. 33, fig. 18.8.

2019 Novispathodus pingdingshanensis (Zhao & Orchard) ; Liu et al., p. 13, pl. 3, figs. 3, 6 (only).

2019 Triassospathodus symmetricus? (Orchard) ; Chen et al., fig. 4.15.

Material. ca. 15 specimens.

Remarks. One small terminal denticle behind the cusp is present. Te denticles are mostly fused, with subtriangular tips and increasingly reclined towards the posterior end. A moderately deep, conical, subcircular shaped basal cavity is present. Te overall shape of the segminateP 1 element is reminiscent of that of the sub-coeval Nv. pingdingshanensis or Nv. abruptus except that, contrary to Nv. pingdingshanensis , the denticles are reclined not recurved, and contrary to Nv. abruptus , there is only one small denticle behind the cusp, the latter being also conspicuously broader than adjacent denticles. Our specimens from China resemble the specimens from Panthalassa California (Darwin material), suggesting that this species may be important for worldwide correlations. Orchard (2007) mentioned, that Neospathodus kedahensis ( Koike 1973) might be an available name for his Ns. n. sp. Z (Orchard 2007). However, Neospathodus kedahensis ( Koike 1973) a Middle-to-Late Triassic species, lacks a conspicuous cusp and its posterior part is composed of slightly inclined and subequal denticles.

Occurrence. Taho Formation, Japan ( Maekawa et al., 2018). North America (Orchard 2007, Goudemand et al., in prep.). Oman: Radio Tower section, UAZ 5 ( Chen et al., 2019), South China; Nanpanjiang basin: Bac Tuy Formation, Nv. pingdingshanensis zone ( Komatsu et al., 2016); Qinglong Formation, Nv. pingdingshanensis Zone , Jiangsu Province ( Liu et al., 2019) Luolou Formation, Qiakong section, Southern Gouizhou, China (this study).

Figures

Fig. 20 (See legend on previous page.)