Middle Cambrian to Lower Ordovician faunas from the Chingiz Mountain Range, central Kazakhstan

Tolmacheva, T. Yu.; Degatyarev, K.E.; Samuelsson, Joakim; Holmer, Lars E.

doi:10.1080/03115510802418099

Cited by 14 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Discussion.-The single dorsal valve of Eoscaphelasma sp. reported from the Tremadocian of the Zerbkyzyl Mountains (Central Kazakhstan) by Tolmacheva et al (2008) has prominent, evenly spaced rugae and a prominent larval shell. These characters agree with Scaphelasma rather than Eoscaphelasma.…”

Section: Figure 17mentioning

confidence: 99%

Linguliform brachiopods from the terminal Cambrian and lowest Ordovician of the Oaxaquia microcontinent (Southern Mexico)

et al. 2011

View full text Add to dashboard Cite

Eighteen taxa of linguliform brachiopods, mainly represented by acrotretoids, are reported from the Upper Cambrian (Furongian, Stage 10) and Lower Ordovician (Tremadocian) Tiñu Formation of Oaxaca State, Mexico. At the time of deposition, this area was part of Oaxaquia, which was either a microcontinent or an integral part of the Gondwanan margin. Whereas certain trilobites seem to indicate a Gondwanan affinity, the Tiñu brachiopod faunas show a less definite paleogeographic relationship. Some taxa have previously only been reported from Laurentia (Eurytreta cf. fillmorensis, Eurytreta cf. campaniformis), and one taxon is best known from the Avalon microcontinent (Eurytreta cf. sabrinae). However, the relatively high percentage of new and potentially endemic taxa (Oaxaquiatreta labrifera n. gen. n. sp., Tapuritreta reclinata n. sp., Oaxaquiatreta sp., Eurytreta? n. sp., Acrotretidae n. gen. n. sp., Obolinae gen. and sp. indet.) and the lack of other typical Laurentian, Gondwanan, or Avalonian taxa suggest either a certain degree of insularity of Oaxaquia or reflects a more temperate, unrestricted marine environment during the Early Paleozoic. Other taxa reported from the Tiñu Formation include Semitreta sp., Lingulella? spp., Obolinae gen. and sp. indet., Eoscaphelasma? sp., Ottenbyella? sp. A and sp. B, and Acrotretidae gen. and sp. indet. A, B, and C. Eurytreta and Semitreta are critically reviewed and several taxa previously assigned to them have been excluded. An emended diagnosis for the genus Eurytreta is presented. The presence of delthyrium and notothyrium-like structures in the siphonotretid Oaxaquiatreta n. gen. further strengthens the previously proposed relationship between the Siphonotretida and Paterinida.

show abstract

Section: Figure 17mentioning

confidence: 99%

Linguliform brachiopods from the terminal Cambrian and lowest Ordovician of the Oaxaquia microcontinent (Southern Mexico)

et al. 2011

View full text Add to dashboard Cite

show abstract

“…6). Tolmacheva et al (2008) first described R. manitouensis from Kazakhstan. Agematsu et al (2008) adopted the R. manitouensis Range Zone, delimited by the FAD and LAD of the index species, in the lower Thung Song Formation of Tarutao Island, southern peninsular Thailand.…”

Section: Implemented This Subdivision For Thementioning

confidence: 99%

New data on conodonts and ostracods of the Katkoyeh Formation (Lower-Upper Ordovician) at the Banestan Section of East-Central Iran: biostratigraphical and palaeobiogeographical significance

Poursalehi¹,

Voldman²,

Bahrami³

et al. 2022

Bull. Geosci.

View full text Add to dashboard Cite

Iran was a persistent single tectonic unit throughout the Ordovician, located somewhere on the northern margin of Gondwana (Cocks & Torsvik 2021). Its precise rifting time from mainland Gondwana is still not defined, but the very low diversity of Ordovician brachiopod faunas in the region by comparison with contemporaneous Mediterranean Province fauna of Morocco and Bohemia suggests that Iran was situated in a high latitude location throughout the Ordovician Period (Basset et al. 1999).Ordovician marine sedimentary sequences occur in a number of widely separated structural units of Iran.Mostly but not exclusively, they crop out in the Zagros area (Southwest Iran), and in the well-known outcrops of the Alborz Range (North Iran), Tabas and Kerman regions (East-Central Iran) (Fig. 1A). Parts of the sequences contain rich fossil faunas, such as conodonts, trilobites or brachiopods, but with a small number of notable exceptions there are few studies on taxonomy, biostratigraphy and biogeography of these biotas (e.g.

show abstract

Cambrian brachiopods from the area of the former Semipalatinsk nuclear-testing site, Chingiz Ranges, Kazakhstan

Popov

Nikitina

Pirogova

et al. 2021

PalZ

View full text Add to dashboard Cite

Middle Cambrian to Lower Ordovician faunas from the Chingiz Mountain Range, central Kazakhstan

Cited by 14 publications

References 11 publications

Linguliform brachiopods from the terminal Cambrian and lowest Ordovician of the Oaxaquia microcontinent (Southern Mexico)

Linguliform brachiopods from the terminal Cambrian and lowest Ordovician of the Oaxaquia microcontinent (Southern Mexico)

New data on conodonts and ostracods of the Katkoyeh Formation (Lower-Upper Ordovician) at the Banestan Section of East-Central Iran: biostratigraphical and palaeobiogeographical significance

Cambrian brachiopods from the area of the former Semipalatinsk nuclear-testing site, Chingiz Ranges, Kazakhstan

Contact Info

Product

Resources

About