Late Triassic (Julian) conodont biostratigraphy of a transition from reefal limestones to deep‐water environments on the Cimmerian terranes (Taurus Mountains, southern Turkey)

Abstract

Sections at As ßa giyaylabel and Yukariyaylabel, Taurus Mountains, southern Turkey, provide a rare opportunity to investigate conodont faunas in detail across a reef to slope transition. Intensive sampling of limestone beds (wackestones to packstones) through approximately 3 m at these locations has led to the recognition of a new lower Carnian (Julian 1/2) conodont fauna within the Kartoz and Kasimlar formations. Members of the subfamilies Paragondolellinae and Pseudofurnishiinae are recognized. The genus Kraussodontus is reported for the first time from the Taurus Mountains. Mosherella postkockeli and Mosherella praebudaensis sp. nov. occur within the lower Carnian Carbonate Member of the Kasimlar Formation from the Taurus Platform Units. The discovery of the new conodont assemblages from As ßa giyaylabel and Yukariyaylabel facilitates a correlation with faunal assemblages worldwide. F I G . 1 . Position of the As ßa giyaylabel (= Kartoz) and Yukariyaylabel (= Karapinar) sections in the Taurus Mountains (Anatolia, southwest Turkey). A, geography; and B, geology of the investigated area. C, outcrops of Upper Triassic sediments around the area of As ßa giyaylabel and Yukariyaylabel within the the Anamas Daǧ carbonate platform. Investigated sections are indicated as ASI and IV and KAI, II

First Records of Late Triassic Conodont Fauna and δ13Ccarb from the Dengdengqiao Section, Dangchang County, Gansu Province, Northwestern China

“…The species Mo. praebudaensis recovered from the upper part of bed 2 at Dengdengqiao Section was previously reported from southern Turkey (Chen and Lukeneder, 2017) and Nevada, USA (Orchard and Balini, 2007;Mosher, 1968) in Julian 2 (early Carnian) strata. So the presence of Mo.…”

“…budaensis were previously assigned to the genus Nicoraella (e.g., Kolar-Jurkovšek and Jurkovšek, 2010;Kozur, 1993;Kozur and Mock, 1991), but are now suggested to belong to the genus Mosherella because there is >5 Ma long interval between the occurrences of the two genera (Chen et al, 2016). The genus Mosherella is known from North America (Orchard, 2010;Orchard and Balini, 2007;Orchard and Tozer, 1997;Mosher, 1968), Europe Jurkovšek, 2019, 2010;Kozur, 1993;Kozur and Mock, 1991), southern Turkey (Chen and Lukeneder, 2017) and Malaysia (Ishida and Hirsch, 2011). In South China, one Mo.…”

“…Late Triassic conodonts have received much less attention compared with those of the Early or Middle Triassic (e.g., Liu et al, 2020;Chen Y L et al, 2019;Li et al, 2019;Yang et al, 2019;Lyu et al, 2018). Conodont biostratigraphy is an important tool for the subdivision and correlation of Late Triassic marine strata (e.g., Rigo et al, 2018Rigo et al, , 2007Zhang et al, 2018a, b;Chen and Lukeneder, 2017) thanks to the good preservational potential, wide distribution and high evolutionary rates of conodonts.…”

“…Mosherella has been reported from North America, Europe, Turkey and Malaysia (e.g., Chen and Lukeneder, 2017;Kolar-Jurkovšek and Jurkovšek, 2010;Orchard, 2010;Orchard and Balini, 2007;Orchard and Tozer, 1997;Mosher, 1968) but in South China only segminiplanate conodonts have been widely reported from Carnian strata (Jiang et al, 2019;Zhang et al, 2018aZhang et al, , b, 2017Shi et al, 2017;Sun et al, 2016). Only a single segminate conodont specimen, attributed to Mosherella, is known from the Guandao Section, Nanpanjiang Basin (the same materials were listed in Lehrmann et al, 2015 andWang et al, 2005).…”

Carnian (Late Triassic) conodont faunas from south‐western China and their implications

“…The loose definition of type specimens and large ontogenetic variations of Q. polygnathiformis have hindered identification of the species (Koike et al . ; Orchard ; Chen & Lukeneder ). However, the abrupt step on both lateral margins is distinct and provides the key diagnostic feature.…”