Upper Ordovician brachiopods from the Anderken Formation, Kazakhstan: their ecology and systematics

Abstract

Synopsis 13SYNOPSIS. The brachiopod fauna from the Anderken Formation ( Lower to Middle Caradoc) of the Chu-Ili Range, south-eastern Kazakhstan, is revised and described systematically. It consists of 62 species in 55 genera, of which the genera Tesikella, Olgambonites and Zhilgyzambonites (all Plectambonitoidea) and llistrophina (Camarelloidea) are new, and the species Bellimurina

Oldest glosselline linguliform brachiopod with soft parts from the Lower Cambrian of Yunnan, Southern China

“…Eoglossa is characterised by only having growth lines across the whole shell. This simple ornamentation is rarely seen in other glossellinids (Havlicek & Massa 1973;Percival 1978;Holmer 1989;Havlicek 1998;Popov 2000;Popov et al 2000Popov et al , 2002bPopov et al , 2007Holmer et al 2005;Mergl 2008;Hansen & Holmer 2011). In this aspect, Eoglossa is closer to Rafanoglossa which shares the same primitive ornamentations (Havlíc̆ek 1980;Holmer & Popov 2000).…”

“…The new date on the pseudointerarea indicate that it can be referred to the Subfamily Glossellinae (Havlicek & Massa 1973;Holmer 1989;Havlicek 1998;Holmer & Popov 2000;Popov 2000) and Lingulella chengjiangensis is here referred to the new genus Eoglossa. The Glossellinae was previously known only from the Ordovician (Havlicek & Massa 1973;Percival 1978;Holmer 1989;Havlicek 1998;Popov 2000;Popov et al 2000Popov et al , 2002bPopov et al , 2007Holmer et al 2005;Mergl 2008;Hansen & Holmer 2011), and Eoglossa is to date the oldest Glosselline linguliform brachiopods. The new data on the soft anatomy of also provides some new information about the life habit of Eoglossa.…”

Early athyride brachiopod evolution through the Ordovician-Silurian mass extinction and recovery, Anticosti Island, eastern Canada

“…These early forms may have a smooth or capillate shell surface. These hindellides may have evolved from the older athyrides, such as Nikolaispira Nikitin and Popov in Nikitin et al, 1996 andKellerella Nikitin andPopov in Nikitin et al, 1996, from the Anderken Formation (Dulankara Stage, mid-late Katian) of Chu Ili, Kazakhstan (see also Popov et al, 1999Popov et al, , 2002Nikitin et al, 2006). These Kazakh forms show more primitive characters, such as short, spine-like jugul processes that are not medially connected.…”

A Kralodvorian (upper Katian, Upper Ordovician) benthic association from the Ferradosa Formation (central Portugal) and its significance for the redefinition and subdivision of the Kralodvorian Stage

“…Dolerorthis Schuchert & Cooper, 1931 has been reported from the Sandbian of Baltica (Norway; Harper et al 1984), the upper Sandbian-lower Katian of the Chu-Ili Range and Chingiz Terrane, Kazakhstan (Klenina et al 1984, Popov et al 2002 (Williams 1962) and North China (Rong & Zhan 1996). Three species of this genus are known in high-latitude peri-Gondwana, D. interplicata (Vinassa de Regny, 1927) and D. maxima (Vinassa de Regny, 1927) from the upper Berounian-Kralodvorian (Katian Global Stage) Portixeddu Formation of Sardinia and D. abeirensis Mélou, 1990 from the upper Kralodvorian (global uppermost Katian) of the Armorican Massif.…”