Progressive marine oxygenation and climatic cooling at the height of the Great Ordovician Biodiversification Event

Kozik, Nevin P.; Young, Seth A.; Ahlberg, Per; Lindskog, Anders; Owens, Jeremy D.

doi:10.1016/j.gloplacha.2023.104183

Cited by 5 publications

(1 citation statement)

References 107 publications

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“…With respect to temperature, modern lingulides are restricted to equatorial and subtropical latitudes and low temperature is considered a stress factor 4 . However, the study area was in a high-latitude position 76 and at a time of global cooling 121 , 122 , suggesting that lingulides were at once able to adapt to low water temperatures. Similarly, lingulide body and trace fossils were found in Upper Devonian lagoonal deposits 47 and Late Carboniferous deltaic environments 41 at high paleogeographic latitudes, supporting the idea of a greater ability to tolerate low temperatures and inhabit high latitudes earlier in their evolutionary history.…”

Section: Discussionmentioning

confidence: 98%

Deep-sea Ordovician lingulide brachiopods and their associated burrows suggest an early colonization of proximal turbidite systems

Paz,

Mángano,

Buatois

et al. 2023

Sci Rep

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Trace fossils from Ordovician deep-marine environments are typically produced by a shallow endobenthos adapted to live under conditions of food scarcity by means of specialized grazing, farming, and trapping strategies, preserved in low-energy intermediate to distal zones of turbidite systems. High-energy proximal zones have been considered essentially barren in the early Paleozoic. We report here the first trace and body fossils of lingulide brachiopods in deep-marine environments from an Upper Ordovician turbidite channel-overbank complex in Asturias, Spain. Body and trace fossils are directly associated, supporting the interpretation of a lingulide tracemaker. Ellipsoidal cross-section, cone-in-cone spreite, and spade morphologies suggest the specimens belong to Lingulichnus verticalis. The oblique orientation in both trace and body fossils is the result of tectonic deformation. The organisms were suspension feeders showing escape, dwelling, and equilibrium behaviours controlled by sedimentation rates associated with turbidite deposition. These trace fossils and their in situ producers represent the oldest evidence of widespread endobenthos colonization in high-energy, proximal areas of turbidite systems, expanding the bathymetric range of Lingulichnus and the variety of behaviours and feeding styles in early Paleozoic deep-marine environments.

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