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 : 38

Novispathodus n. sp. A

Figs. 19G, K, O, P, Q ; 20 T, Y, Z

2015 Novispathodus aff. Clinatus Orchard & Sweet ; Chen et al., p. 111, fig. 7, nr. 6 (only).

Number of specimens.> 10.

Description. Segminate P 1 element. 6–10 denticles present. Te cusp is terminal and distinctly conical and often more reclined than anterior denticles. Anteriorly, the denticles are almost as high as the cusp and decline gradually towards the anterior end. Te denticles are mostly fused and the cusp is conical or sometimes swollen at mid-height. Te lower margin is straight to slightly upturned in the posterior half. Basal cavity rounded at posterior margin and tapers towards the anterior end. Basal groove runs from the basal pit to the anterior end.

Remarks. Similar to Nv. ex gr. pingdingshanensis in size and in its overall morphological outline, but differs by having a conical and terminal cusp. Te denticles are straight, upright to slightly reclined, not recurved as in Nv. pingdingshanensis . In Nv. abruptus , the posteriormost denticles show a gradual decline that is not observed here. One of the elements illustrated by Chen et al. (2015) as Nv. aff. clinatus seems to fall within the variation of this species although it has more inclined posterior denticles.

Occurrence. In the late Smithian UAZ 7 in Qiakong, Lilong, Guangxi, South China (this study).

Figures

Fig. 19 Novispathodinae from Qiakong,Laren and Lilong. Magnification is ×80.The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A Novispathodus cf.brevissimus (Orchard); LIL515C,PIMUZ 39199. B, F Novispathodus brevissimus (Orchard); B LIL515B, PIMUZ 39200; F BAN1, PIMUZ 39201. C Triassospathodus homeri (Bender); LIL515D,PIMUZ 39317. D, H Novispathodus?brevissimus (Orchard); D LIL515D,PIMUZ 39202; H LIL514A, PIMUZ 39203. E Triassospathodus cf.homeri (Bender); LIL515C, PIMUZ 39318. G, K, O–Q Novispathodus n. sp. A; G LIL504,PIMUZ 39251; K LIL504,PIMUZ 39252; O LIL505, PIMUZ 39253; P LIL505, PIMUZ 39254;Q LIL505,PIMUZ 39255. I, L, M, Triassospathodus symmetricus (Orchard); I QIA141, PIMUZ 39336; L LIL512, PIMUZ 39337; M LIL514A, PIMUZ 39338. J Novispathodus ex gr.pingdingshanensis (Zhao & Orchard); QIA138, PIMUZ 39237. N Triassospathodus cf. symmetricus; LIL514B, PIMUZ 39339.R Novispathodus praebrevissimus n.sp; LIL505, PIMUZ 39289

Fig. 20 (See legend on previous page.)