The age of the oldest tetrapod tracks from Zachełmie, Poland

Narkiewicz, Katarzyna; Narkiewicz, Marek

doi:10.1111/let.12083

Cited by 17 publications

(10 citation statements)

References 16 publications

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“…Rabbit DHPRα 1S shares similar amino acid sequence identity to the representatives (n = 11) of different mammalian families, ranging from 89% (African elephant), 93% (human, mouse, rat, cat, and horse) to 94% (walrus). Mammals are a clade within the tetrapods which evolved around 390 million years ago [47] as the most advanced branch from the evolutionary less successful (because most species are extinct) second class of “bony fishes” (Osteichtyes), the so called “lobe-finned fishes” (Sarcopterygii) (Fig. 1).…”

Section: Discussionmentioning

confidence: 99%

The mammalian skeletal muscle DHPR has larger Ca2+ conductance and is phylogenetically ancient to the early ray-finned fish sterlet (Acipenser ruthenus)

2017

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The L-type Ca2+ channel or dihydropyridine receptor (DHPR) in vertebrate skeletal muscle is responsible for sensing sarcolemmal depolarizations and transducing this signal to the sarcoplasmic Ca2+ release channel RyR1 via conformational coupling to initiate muscle contraction. During this excitation-contraction (EC) coupling process there is a slow Ca2+ current through the mammalian DHPR which is fully missing in euteleost fishes. In contrast to ancestral evolutionary stages where skeletal muscle EC coupling is still depended on Ca2+-induced Ca2+-release (CICR), it is possible that the DHPR Ca2+ conductivity during mammalian (conformational) EC coupling was retained as an evolutionary remnant (vestigiality). Here, we wanted to test the hypothesis that due to the lack of evolutionary pressure in post-CICR species skeletal muscle DHPR Ca2+ conductivity gradually reduced as evolution progressed. Interestingly, we identified that the DHPR of the early ray-finned fish sterlet (Acipenser ruthenus) is phylogenetically positioned above the mammalian rabbit DHPR which retained robust Ca2+ conductivity, but below the euteleost zebrafish DHPR which completely lost Ca2+ conductivity. Remarkably, our results revealed that sterlet DHPR still retained the Ca2+ conductivity but currents are significantly reduced compared to rabbit. This decrease is due to lower DHPR membrane expression similar to zebrafish, as well as due to reduced channel open probability (Po). In both these fish species the lower DHPR expression density is partially compensated by higher efficacy of DHPR-RyR1 coupling. The complete loss of Po in zebrafish and other euteleost species was presumably based on the teleost specific 3rd round of genome duplication (Ts3R). Ts3R headed into the appearance of two skeletal muscle DHPR isoforms which finally, together with the radiation of the euteleost clade, fully lost the Po.

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Section: Discussionmentioning

confidence: 99%

The mammalian skeletal muscle DHPR has larger Ca2+ conductance and is phylogenetically ancient to the early ray-finned fish sterlet (Acipenser ruthenus)

2017

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“…The first representatives of early tetrapods diverged from their ancestors in the Early Devonian, approximately 400 mya (Figure 9a; George & Blieck, 2011;Narkiewicz & Narkiewicz, 2015). Two emblematic Devonian tetrapods, that is, Acanthostega (Coates, 1996) and Ichthyostega (Jarvik, 1996;Ahlberg et al, 2005;Figure 9b,c), F I G U R E 9 Ribs.…”

Section: Ribsmentioning

confidence: 99%

Deconstructing the long‐standing a priori assumption that serial homology generally involves ancestral similarity followed by anatomical divergence

Siomava

Fuentes

Diogo

2020

Journal of Morphology

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It has long been assumed that serial homologues are ancestrally similarpolysomerism resulting from a "duplication" or "repetition" of forms-and then often diverge-anisomerism, for example, as they become adapted to perform different tasks as is the case with the forelimb and hind limbs of humans. However, such an assumption, with crucial implications for comparative, evolutionary, and developmental biology, and for evolutionary developmental biology, has in general not really been tested by a broad analysis of the available empirical data. Perhaps not surprisingly, more recent anatomical comparisons, as well as molecular knowledge of how, for example, serial appendicular structures are patterned along with different anteroposterior regions of the body axis of bilateral animals, and how "homologous" patterning domains do not necessarily mark "homologous" morphological domains, are putting in question this paradigm. In fact, apart from showing that many so-called "serial homologues" might not be similar at all, recent works have shown that in at least some cases some "serial" structures are indeed more similar to each other in derived taxa than in phylogenetically more ancestral ones, as pointed out by authors such as Owen. In this article, we are taking a step back to question whether such assumptions are actually correct at all, in the first place. In particular, we review other cases of so-called "serial homologues" such as insect wings, arthropod walking appendages, Dipteran thoracic bristles, and the vertebrae, ribs, teeth, myomeres, feathers, and hairs of chordate animals. We show that: (a) there are almost never cases of true ancestral similarity; (b) in evolution, such structures-for example, vertebra-and/or their subparts-for example, "transverse processes"-many times display trends toward less similarity while in many others display trends toward more similarity, that is, one cannot say that there is a clear, overall trend to anisomerism.

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“…However, recently discovered trackways place the minimum date for the origin of tetrapods (i.e. having limbs with digits) around 392 MYA, likely in an ocean lagoon environment (Niedźwiedzki et al, 2010;Narkiewicz & Narkiewicz, 2015). In the context of low preservation rates and a mismatch between body fossils and trackways, hypotheses about the specific time period or environment in which tetrapod limbs first appeared should be viewed with caution (Friedman & Brazeau, 2011).…”

Section: Introductionmentioning

confidence: 99%

Reconstructing pectoral appendicular muscle anatomy in fossil fish and tetrapods over the fins‐to‐limbs transition

et al. 2017

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The question of how tetrapod limbs evolved from fins is one of the great puzzles of evolutionary biology. While palaeontologists, developmental biologists, and geneticists have made great strides in explaining the origin and early evolution of limb skeletal structures, that of the muscles remains largely unknown. The main reason is the lack of consensus about appendicular muscle homology between the closest living relatives of early tetrapods: lobe-finned fish and crown tetrapods. In the light of a recent study of these homologies, we re-examined osteological correlates of muscle attachment in the pectoral girdle, humerus, radius, and ulna of early tetrapods and their close relatives. Twenty-nine extinct and six extant sarcopterygians were included in a meta-analysis using information from the literature and from original specimens, when possible. We analysed these osteological correlates using parsimony-based character optimization in order to reconstruct muscle anatomy in ancestral lobe-finned fish, tetrapodomorph fish, stem tetrapods, and crown tetrapods. Our synthesis revealed that many tetrapod shoulder muscles probably were already present in tetrapodomorph fish, while most of the more-distal appendicular muscles either arose later from largely undifferentiated dorsal and ventral muscle masses or did not leave clear correlates of attachment in these taxa. Based on this review and meta-analysis, we postulate a stepwise sequence of specific appendicular muscle acquisitions, splits, and fusions that led from the ancestral sarcopterygian pectoral fin to the ancestral tetrapod forelimb. This sequence largely agrees with previous hypotheses based on palaeontological and comparative work, but it is much more comprehensive in terms of both muscles and taxa. Combined with existing information about the skeletal system, our new synthesis helps to illuminate the genetic, developmental, morphological, functional, and ecological changes that were key components of the fins-to-limbs transition.

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The age of the oldest tetrapod tracks from Zachełmie, Poland

Cited by 17 publications

References 16 publications

The mammalian skeletal muscle DHPR has larger Ca2+ conductance and is phylogenetically ancient to the early ray-finned fish sterlet (Acipenser ruthenus)

The mammalian skeletal muscle DHPR has larger Ca2+ conductance and is phylogenetically ancient to the early ray-finned fish sterlet (Acipenser ruthenus)

Deconstructing the long‐standing a priori assumption that serial homology generally involves ancestral similarity followed by anatomical divergence

Reconstructing pectoral appendicular muscle anatomy in fossil fish and tetrapods over the fins‐to‐limbs transition

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