Urdyella tridenta, 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 : 51

Urdyella tridenta n. sp.

Fig. 26 X-AA

Etymology: Te species is named after the trident, Poseidon’s weapon in the Greek mythology.

Holotype. Specimen illustrated in Fig. 26 AA.

Paratype. Specimens illustrated in Fig. 26Z .

Number of specimens. 5

Diagnosis. Coniform P 1 element with three subequally long and slightly recurved denticles all attached to the basal cup. Deep, teardrop shaped basal cavity. No clear anterior process.

Remarks. Te P 1 element of this species is very similar to the one of Urdyella unicorna n. sp. except for the lack of an anterior process and the fact that the single large cusp of Urdyella unicorna n. sp. is replaced by three subequally long denticles in Urdyella tridenta n. sp.

Occurrence. Laren road cut, Luolou Formation, Smithian age, Nanpanjiang basin, South China (this paper).

Figures

Fig. 26 Cornudininae from Qiakong, Laren and Shanggang. Magnification is ×80.The scale bar is 400 μm. All elements are considered to be P1 elements if not specifically identified otherwise. A–W Urdyella unicorna n. gen. n. sp.; A LAR225, PIMUZ 39345; B LAR225, PIMUZ 39346;C LAR229, PIMUZ 39347; D LAR227, PIMUZ 39348;E LAR229,PIMUZ 39349; F LAR229,PIMUZ 39350; G LAR225,PIMUZ 39351; H LAR229,PIMUZ 39352; I QIA123, PIMUZ 39353; J LAR227,PIMUZ 39354; K QIA123, PIMUZ 39355; L QIA123, PIMUZ 39356; M LAR227,PIMUZ 39357; N LAR225, PIMUZ 39358; O QIA120, PIMUZ 39359; P LAR225, PIMUZ 39360; Q QIA121, PIMUZ 39361; R LAR232, PIMUZ 39362; S LAR232, PIMUZ 39363; T QIA124,PIMUZ 39364; U LAR232, PIMUZ 39365; V QIA123, PIMUZ 39366; W SHA341, PIMUZ 39367.X-AA Urdyella tridenta n. gen. n. sp.; X LAR227, PIMUZ 39341; Y LAR227, PIMUZ 39342; Z LAR227, PIMUZ 39343; AA LAR227, PIMUZ 39344.AB, AC Discretella? n. sp. D; AB QIA124, PIMUZ 39118; AC QIA123, PIMUZ 39119. AD Neostrachanognathus n. sp. A; LAR232, PIMUZ 39183. AE Urdyella n. sp. A; LAR232, PIMUZ 39340