Reconstruction of the multielement apparatus of <i>Neogondolella</i> ex gr. <i>regalis</i> Mosher, 1970 (Conodonta) from the Anisian (Middle Triassic) in British Columbia, Canada

Abstract

Abstract. The multi-element apparatus of the Middle Triassic conodont Neogondolella ex gr. regalis has been reconstructed based on material collected from the upper Anisian in British Columbia, Canada. The apparatus of this species group is distinguished by the presence of a segminiplanate P1 element with a high, fused carina, and an alate S0 element with anterior processes that bifurcate at the cusp. This S0 element morphology is unlike those of other species from the upper Anisian of North America, but similar to those from the Lower Triassic. The new reconstruction demonstrates that Neogondolella ex gr. regalis does not belong to the genus Neogondolella, nor to any other Triassic gondolellid genus. It is therefore proposed that Neogondolella ex gr. regalis should be referred to a new genus.

North American Spathian (upper Olenekian, Lower Triassic) neogondolellin conodonts

“…Segminiplanate P1 elements of the Olenekian have been assigned to the genera Borinella , Columbitella , Magnigondolella , Neogondolella , Scythogondolella and Siberigondolella . Multielement apparatuses have been reconstructed for four of these (Orchard 2005; Golding 2018). The apparatuses of Magnigondolella and Neogondolella are demonstrably the same, whereas Columbitella has a different S1 element (S2 in Orchard 2005); the largely Smithian Scythogondolella has very different S1, S3 and S4 elements that led to its inclusion in a separate subfamily, the Scythogondolellinae Orchard 2007.…”

“…The platform is downturned at its posterior end above which the cusp is relatively discrete. The multielement apparatus was described by Golding (2018), who showed it is the same as that of contemporaneous Neogondolella species.…”

Late Triassic (Norian) Conodont Apparatuses Revealed by Conodont Clusters from Yunnan Province, Southwestern China

“…Pseudofurnishius murcianus (Kolar-Jurkovšek et al, 2018) and Neogondolella (Golding, 2018;Orchard, 2005;Orchard and Rieber, 1999), Norian Mockina slovakensis (Demo, 2017) The M elements, preserved in clusters 2.6 and 3.1 as well as being present among the isolated elements recovered have a long, recured and caudally projected lateral process, a short excurved lateral process and a distinct cusp, resulting in a twisted morphology.…”