Armoured test of Early Devonian Mesoconularia (Conulariida) from the Prague Basin (Czech Republic): probable adaptation to increased predation pressure

Two new limpets with a caenogastropod-type larval shell are described from the Mississippian (Early Carboniferous) of Australia and assigned to Australoscutula n. gen. of the family Pragoscutulidae. This family has previously been reported only from the Early Devonian of Europe (Czech Republic, Prague Basin). Therefore, it survived the Late Devonian biotic crisis. the fact that one of the earliest certain caenogastropods has a patelliform shell is noteworthy given most other Middle to Late Paleozoic caenogastropods are high-spired or fusiform. Pragosutulidae are interpreted as an early patelliform caenogastropod offshoot derived from coiled ancestors. the Pragoscutulidae are the oldest gastropod limpets with well-preserved larval shells. Their teleoconch is entirely limpet-shaped without helicoid coiling. However, the helicoid turbiniform larval shells suggests that this group evolved from an ancestor with turbiniform or even high-spired adult shell. Moreover, the multi-whorled dextral larval shells show that Pragoscutulidae are Caenogastropoda and document that early Caenogastropoda displayed considerable disparity.

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The trilobite Family Illaenidae Hawle et Corda, 1847 from the Ordovician of the Prague Basin (Czech Republic)

Transactions of the Royal Society of Edinburgh Earth Sciences ◽

10.1017/s0263593302000123 ◽

2002 ◽

Vol 93 (02) ◽

pp. 167

Keyword(s):

Czech Republic ◽

Prague Basin

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The earliest ostracods from the Ordovician of the Prague Basin, Czech Republic

Acta Geologica Polonica ◽

10.2478/agp-2014-0021 ◽

2014 ◽

Vol 64 (4) ◽

pp. 367-392 ◽

Cited By ~ 5

Author(s):

Karolína Lajblová ◽

Petr Kraft

Keyword(s):

Czech Republic ◽

Bohemian Massif ◽

Massif Central ◽

Central European ◽

Middle Ordovician ◽

Prague Basin ◽

Barrandian Area ◽

Fossil Assemblages ◽

European Variscides

Abstract The earliest ostracods from the Bohemian Massif (Central European Variscides) have been recorded from the Middle Ordovician of the Prague Basin (Barrandian area), in the upper Klabava Formation, and became an abundant component of fossil assemblages in the overlying Šarka Formation. Both early ostracod associations consist of eight species in total, representing mainly eridostracans, palaeocopids, and binodicopids. The revision, description, or redescription of all species and their distribution in the basin is provided. Their diversification patterns and palaeogeographical relationships to ostracod assemblages from other regions are discussed.

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