Possible evidence of predation in placoderms (Pisces) of the Evlanovo basin of central Russia

Zakharenko, G.V.

doi:10.1134/s0031030108050079

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…Furthermore, given the large size of Leptodontichthys , it is possible that it preyed on smaller gnathostomes, including juveniles. This concurs with the previous reports of some plourdosteids (Zakharenko 2008 ) and coccosteomorphs such as Coccosteus (Miles and Westoll 1968 ; Davidson and Trewin 2005 ) with small fish, acanthodian and juvenile placoderm remains in the stomach area or gut content. However, no direct evidence for the diet of Leptodontichthys is available as no stomach content is preserved, so these suggestions remain speculative.…”

Section: Discussionsupporting

confidence: 93%

A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern Gondwana

et al. 2021

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For the understanding of the evolution of jawed vertebrates and jaws and teeth, ‘placoderms’ are crucial as they exhibit an impressive morphological disparity associated with the early stages of this process. The Devonian of Morocco is famous for its rich occurrences of arthrodire ‘placoderms’. While Late Devonian strata are rich in arthrodire remains, they are less common in older strata. Here, we describe a large tooth-bearing jaw element of Leptodontichthys ziregensis gen. et sp. nov., an eubrachythoracid arthrodire from the Middle Devonian of Morocco. This species is based on a large posterior superognathal with a strong dentition. The jawbone displays features considered synapomorphies of Late Devonian eubrachythoracid arthrodires, with one posterior and one lateral row of conical teeth oriented postero-lingually. μCT-images reveal internal structures including pulp cavities and dentinous tissues. The posterior orientation of the teeth and the traces of a putative occlusal contact on the lingual side of the bone imply that these teeth were hardly used for feeding. Similar to Compagopiscis and Plourdosteus, functional teeth were possibly present during an earlier developmental stage and have been worn entirely. The morphological features of the jaw element suggest a close relationship with plourdosteids. Its size implies that the animal was rather large.

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Section: Discussionsupporting

confidence: 93%

A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern Gondwana

et al. 2021

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“…2017; Randle & Sansom 2019), and a number of isolated attack marks have also been reported (e.g. Zakharenko 2008; Elliott & Petriello 2011).…”

mentioning

confidence: 96%

“…White 1945; Obruchev & Mark‐Kurik 1965; Mark‐Kurik 1966; Capasso et al . 1996; Clément 2004; Zakharenko 2008; Lebedev et al . 2009; Elliott & Petriello 2011; Errol & White 2015;Tuuling 2015; Glinskiy & Mark‐Kurik 2016; Lukševićs et al .…”

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confidence: 99%

Vertebrate predation in the Late Devonian evidenced by bite traces and regurgitations: implications within an early tetrapod freshwater ecosystem

Robin

Noirit

Chevrinais

et al. 2022

Papers in Palaeontology

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Predation in the marine fossil record: Studies, data, recognition, environmental factors, and behavior

Klompmaker

Kelley

Chattopadhyay

et al. 2019

Earth-Science Reviews

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The fossil record is the primary source of data used to study predator-prey interactions in deep time and to evaluate key questions regarding the evolutionary and ecological importance of predation. Here, we review the types of paleontological data used to infer predation in the marine fossil record, discuss strengths and limitations of paleontological lines of evidence used to recognize and evaluate predatory activity, assess the influence of environmental gradients on predation patterns, and review fossil evidence for predator behavior and prey defense. We assembled a predation database from the literature that documents a steady increase in the number of papers on predation since the 1960s. These studies have become increasingly quantitative and have expanded in focus from reporting cases of predation documented by fossils to using the fossil record of predation to test ecological and evolutionary hypotheses. The data on the fossil record of predation amassed so far in the literature primarily come from trace fossils, mostly drill holes and, to a lesser extent, repair scars, derived predominantly from the Cenozoic of Europe and North America. Mollusks are the clade most often studied as prey and inferred predators. We discuss how to distinguish biotic from abiotic damage and predatory from parasitic traces, and how to recognize failed predation. Our data show that identifying the predator is easiest when predator and prey are preserved in the act of predation or when predators were fossilized with their gut contents preserved. However, determining the culprits responsible for bite traces, drill holes, and other types of predation traces can be more problematic.Taphonomic and other factors can distort patterns of predation, but their potential effects can be minimized by careful study design. With the correct identification and quantification of fossilized traces of predation, ecological trends in predator-prey interactions may be discerned along environmental gradients in water depth, habitat, and oxygen and nutrient availability.However, so far, these trends have not been explored adequately for the fossil record. We also

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Possible evidence of predation in placoderms (Pisces) of the Evlanovo basin of central Russia

Cited by 3 publications

References 3 publications

A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern Gondwana

A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern Gondwana

Vertebrate predation in the Late Devonian evidenced by bite traces and regurgitations: implications within an early tetrapod freshwater ecosystem

Predation in the marine fossil record: Studies, data, recognition, environmental factors, and behavior

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