Neospathodus ex gr. cristagalli Huckriede, 1958, 1968

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 : 23

Neospathodus ex gr. cristagalli Huckriede, 1958

Fig. 14E

1970 Neospathodus cristagalli Huckriede ; Sweet, p. 346, pl. 1, figs. 14, 15.

1982 Neospathodus cristagalli Huckriede ; Matsuda p. 92, pl. 3, figs. 1–12.

2005 Neospathodus cf. cristagalli Sweet ; Orchard, p. 89, text-fig. 14.

2014 Neospathodus cristagalli Huckriede ; Maekawa & Igo in Shigeta et al., p. 223, figs. 161.10–161.12.

2015 Neospathodus cristagalli Huckriede ; Maekawa in Maekawa et al., p. 315, figs. 5.4–5.6.

Material. ca. 30 specimens.

Remarks. In comparison with the holotype of N. cristagalli ( Huckriede, 1958, Pl. 10, fig. 15), this element is much shorter, the basal cavity is oval, posteriorly rounded and only partly inverted, and the posterior triangular cusp is not conspicuously separated from the other denticles. Sweet still included such forms within N. cristagalli , but excluded similar forms with a rounded basal cavity and rounded, pointy denticles and assigned them to the then new species N. dieneri . In our opinion, such short elements where the cusp is not separated from the other denticles would deserve to be differentiated as a new species.

Occurrence. N. cristagalli is known worldwide in the Dienerian and earliest Smithian. It is not clear yet whether the present form is younger than N. cristagalli sensu stricto and occurs only close to the Dienerian– Smithian (Induan–Olenekian) boundary: Toad Formation, British Columbia ( Orchard, 2005). Salt Range, Pakistan ( Sweet, 1970). Guryul Ravine, Kashmir ( Matsuda, 1982). Nanpanjiang basin; north-eastern Vietnam Flemingites beds within the Novispathodus ex. gr. waageni Zone ( Maekawa et al., 2015; Shigeta et al., 2014). Luolou Formation, Flemingites limestone (this study).

Figures

Fig. 14 Neogondolellinae, Novispathodinae and uncertain from Shanggang. Magnification is × 80.The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise.A, Eurygnathodus costatus (Staesche); SHA325, PIMUZ 39130. B Eurygnathodus hamadai (Koike); SHA326, PIMUZ 39131. C, D, F, G Novispathodus ex gr. waageni (Sweet); C SHA328,PIMUZ 39238; D SHA328, PIMUZ 39239; F SHA325, PIMUZ 39240;G SHA326, PIMUZ 39241.E Neospathodus ex gr. cristagalli (Huckriede); SHA330, PIMUZ 39182.H Neospathodus dieneri (Sweet); SHA338, PIMUZ 39181