Proposing to examine syntheses of manifold experiences of the contemporary philosophical panorama, Michel Foucault’s “critical ontology of actuality” culminates in the elaboration of an epistemology of the human sciences starting from their irreversible modern twist. Among the various possible ways of characterizing this epistemology—equipped with its own modus operandi: the archaeological-genealogical method—is to see it as the result of a reflection on the topic of temporality. In particular, it is a reflection on historical temporality as «knowledge of time», that is (...) organized into two different yet complementary modalities, two historical heterochronies that can be defined as evenemential time and epistemic time. The first, acephalous and atelic, proves discontinuous, traced back to pure becoming. The second corresponds to the necessary disciplining of this original shapeless material by means of the solidification of structures that each time produce an equilibrium among the instances of knowledge and power. Yet these structures, too, remain subjected to that historic-temporal change to which they have attributed an order. Such an interpretation of time implies a metamorphosis of the notion of subject that, within an overall anti-humanistic perspective, goes from its death as the cogito to its rebirth in the form of an ethical-aesthetic subject: no longer the atemporal guarantor of the order of the real, but rather something committed to a risky exercise of its own freedom as care of the Self. (shrink)

The evolutionary embryologist Gavin Rylands de Beer can be viewed as one of the forerunners of modern evolutionary developmental biology in that he posed crucial questions and proposed relevant answers about the causal relationship between ontogeny and phylogeny. In his developmental approach to the phylogenetic phenomenon of homology, he emphasized that homology of morphological structures is to be identified neither with the sameness of the underlying developmental processes nor with the homology of the genes that are in involved in the (...) development of the structures. De Beer’s work on developmental evolution focused on the notion of heterochrony, arguing that paedomorphosis increases morphological evolvability and is thereby an important mode of evolution that accounts for the origin of many taxa, including higher taxa. (shrink)

In his essay “Of Other Spaces” Michel Foucault explained that heterotopias, or spaces of otherness, “function at full capacity when men arrive at a sort of absolute break with their traditional time.” This temporal otherness he described as “heterochrony.” In this article I will draw on the Sartrean ontology of the human being as temporal ecstasis to explain the transcultural phenomenon of hybridity as heterochrony, and in particular, how hybrid temporality is out of sync with local temporality. Heeding (...) Virinder Kalra, Raminder Kaur, and John Hutnyk's admonishment that “hybridity is better conceived of as a process rather than a description,” I will attempt to explicate the multiple processes of hybrid becomings I witnessed as an academic migrant in Cambodia, Hawaii, and Nigeria, and as a member of a hybrid subculture in Singapore. (shrink)

In this paper it is championed that a two stages hypothesis for the evolution of language must take into account a qualified approach to heterochrony and the available information from the archaeological record. As it seems, a protracted childhood and youth was already at work in Homo erectus, but early postnatal brain growth was only available to Homo sapiens. According to these facts, the term hysteron proteron is given here to the reversal that sets off linguistic capacity during the (...) first three years of life, upon the ancient abilities for social, natural and technological knowledge, which were already established during the last 2 Mya BP. The unfolding of linguistic capacity creates the typical effect that ontogeny reverses phylogeny: since late postnatal brain growth, quite recent in evolution, launches in ontogeny before the phylogenetically old processes of playing and learning take place during childhood and youth. Full symbolic abilities may be explained as emerging from older semiotic competences based on iconicity and indexicality, which would have presumably sustained human life for millennia. Furthermore, it is argued that the formation of linguistic categories follows from that overlaying of extended connectivity linked to early postnatal brain growth, inasmuch as it entangles and transforms previous iconic and referential information: i.e. the ancient semiotic capacities for proprioception, embodiment, extended mimesis and pragmatic knowledge, shaping a sort of self-organization process that provides the formal and semantic properties we find in articulated languages. (shrink)

It is posited that the initiating event of amphibian regeneration of a limb, is retrodifferentiation* of what are to become the developing cells of the blastema. These cells reiterate a larval or premetamorphic ontogenic repertoire, induced by elevated levels of prolactin with adequate innervation. Subsequent redifferentiation of the blastema cells occurs, controlled by thyroxine and innervation.This temporal displacement of cellular morphologic characters in regeneration should be looked upon as a function of the ability to reiterate larval characters and subsequently metamorphose. (...) If correct, this would explain why amphibians which metamorphose only once, lose the ability to postmetamorphically regenerate. An exception to this,Xenopus laevis, an anuran which can epimorphically regenerate, to some extent, will be discussed.[/p]. (shrink)

This essay explores South African artist William Kentridge’s multimedia installation The Refusal of Time, first exhibited at documenta in 2012. In the material surrounding this installation, K...

From a developmental and comparative perspective, folk biology is a core “meme.” The universality and resistance to change in such core “memes” may be a function of the developmental timing of cognitive domains during childhood. Evidence from cognitive development in humans, monkeys, and apes is discussed. Suggestions for a developmental research program are offered.

The growing interest and major advances of the last decades in evolutionary developmental biology (EvoDevo) have led to the recognition of the incompleteness of the Modern Synthesis of evolutionary theory. Here we discuss how paleontology makes significant contributions to integrate evolution and development. First, extinct organisms often inform us about developmental processes by showing a combination of features unrecorded in living species. We illustrate this point using the vertebrate fossil record and studies relating bone ossification to life history traits. Second, (...) we discuss exceptionally preserved fossils that document rare ontogenetic sequences and illustrate this case with the patterns of heterochrony observed in Cambrian crustacean larvae preserved three-dimensionally. Third, most fossils potentially document the evolutionary patterns of allometry and modularity, as well as some of the (paleo)ecological factors that had influenced them. The temporal persistence of adaptive patterns in rodent evolution serves to address the importance of ecological constraints in evolution. Fourth, we discuss how the macroevolutionary patterns observed in the tetrapod limb, in the mammal molar proportions, and in the molluscan shell provide independent tests of the validity of morphogenetic models proposed on living species. Reciprocally, these macroevolutionary patterns often act as a source of inspiration to investigate the underlying rules of development, because, at the end, they are the patterns that the neo-Darwinian theory was unable to account for. (shrink)

Schizophrenia is a worldwide, prevalent disorder with a multifactorial but highly genetic aetiology. A constant prevalence rate in the face of reduced fecundity has caused some to argue that an evolutionary advantage exists in unaffected relatives. Here, I critique this adaptationist approach, and review – and find wanting – Crow's “speciation” hypothesis. In keeping with available biological and psychological evidence, I propose an alternative theory of the origins of this disorder. Schizophrenia is a disorder of the social brain, and it (...) exists as a costly trade-off in the evolution of complex social cognition. Paleoanthropological and comparative primate research suggests that hominids evolved complex cortical interconnectivity (in particular, frontotemporal and frontoparietal circuits) to regulate social cognition and the intellectual demands of group living. I suggest that the ontogenetic mechanism underlying this cerebral adaptation was sequential hypermorphosis and that it rendered the hominid brain vulnerable to genetic and environmental insults. I argue that changes in genes regulating the timing of neurodevelopment occurred prior to the migration of Homo sapiens out of Africa 100,000–150,000 years ago, giving rise to the schizotypal spectrum. While some individuals within this spectrum may have exhibited unusual creativity and iconoclasm, this phenotype was not necessarily adaptive in reproductive terms. However, because the disorder shared a common genetic basis with the evolving circuitry of the social brain, it persisted. Thus schizophrenia emerged as a costly trade-off in the evolution of complex social cognition. Key Words: cortical connectivity; evolution; heterochrony; metarepresentation; primates; psychiatry; schizophrenia; social brain; social cognition. (shrink)

This paper reports a longitudinal study on the ontogeny of triadic cooperative interactions in a hand-reared lowland gorilla from 6 months to 36 months of age. Using the behavioural categories developed by Hubley and Trevarthen to characterize the origins of “secondary intersubjectivity” in human babies between 8–12 months of age, I chart the emergence of comparable coordinations of gestures and actions with objects and acts of dyadic communication. The findings show that the categories and concepts of secondary intersubjectivity are applicable (...) to the gorilla, who engages with people in cooperative actions with objects. The ontogeny of triadic interaction in the gorilla was very similar to that described in human infants, but more extended in time and with some peculiarities, such as the absence of pointing and showing gestures, some of whose functions might be taken over by contact gestures which in human infants may appear later in development. The results do not support claims of human uniqueness in the development of cooperative action, but suggest a heterochrony in some aspects of the ontogeny of triadic interactions leading to a divergence between gorilla and human infants within secondary intersubjectivity. Keywords: Triadic communication; secondary intersubjectivity; shared intentionality; cooperation; gorilla. (shrink)

Evolutionary developmental biology (or developmental evolution) is in the middle stages of its “development.” Its early ontogeny cannot be traced back to fertilization but pivotal developmental events included Gould’s (1977) treatment of heterochrony, Riedl’s (1978) analysis of “burden”, the Dahlem conference of 1981, a British Society of Developmental Biologists Symposium, as well as books that incorporated developmental genetics into older comparative themes. A major inductive process began with the discovery of widespread phylogenetic conservation in homeobox-containing genes. One interpretation of (...) these early developmental dynamics holds that an increasingly prominent problem agenda (e.g., how do novel structures and functions originate?), inherited from long-standing research programs in comparative embryology, morphology, and paleontology, was handed a powerful set of experimental tools from the lineage of experimental embryology. This allowed for an experimental probing of development and its evolution in an unprecedented fashion. Although the relationship between evolution and development has exhibited a protracted and complex history, we are still in the process of comprehending these early stages of “modern” EvoDevo’s ontogeny. (shrink)

Transitional forms of the recent classes of vertebrates are only known in paleontology. The well described examples are:Eusthenopteron foordi,Ichthyostega andAcanthostega between Osteichthyes and Amphibia,Seymouria baylorensis between Amphibia and Reptilia,Archaeopteryx lithographica between Reptilia and Aves, and the mammal-like reptiles Pelycosauria, Therapsida and Cynodontia between Reptilia and Mammalia. The description of their phylogenetical heterochronies in terms of peramorphosis and paedomorphosis shows the progressive role of the motorial, especially the locomotorial organ systems and their functions in comparison with the retarded evolution of the (...) axial system, especially the skull and central nervous system. The evolution of the Hominidae shows the same rule. — The evaluation of these transitional forms in their fossil context reveals them as inhabitants of biotopes situated in the border areas of coastal and shore landscapes of marine, brackish or fresh water. These biotopes have obviously favoured the innovations on the high taxonomic level of macro-evolutionary characteristics. (shrink)

Morphological EvoDevo is a field of biological inquiry in which explicit relations between evolutionary patterns and growth or morphogenetic processes are made. Historically, morphological EvoDevo results from the coming together of several traditions, notably Naturphilosophie, embryology, the study of heterochrony, and developmental constraints. A special feature binding different approaches to morphological EvoDevo is the use of formalisms and mathematical models. Here we will introduce anatomical network analysis, a new approach centered on connectivity patterns formed by anatomical parts, with its (...) own concepts and tools specifically designed for the study of morphological EvoDevo questions. Riedl’s concept of burden is tightly related to the use of anatomical networks, providing a nexus between the evolutionary patterns and the structural constraints that shape them. (shrink)

I enlarge on the theme that the brain mechanisms required for languageand other aspects of the human mind evolved through selective changes in the regulatory genes governing growth. Extension of the period of postnatal growth increases the role of the environment in structuring the brain, and spatiotemporal programming (heterochrony) ofgrowth might explain hierarchical representation, hemispheric specialization, and perhaps sex differences.

Gebserian consciousness structures as expressed in human culture are readily understood as analogous to developmental dynamics in holistic biology, and eastern praxis and philosophy. Probably the most integral and fruitful western paradigm of whole-organism biology is that carefully developed in the Goethean tradition to incorporate an understanding of consciousness. This tradition profoundly understands our early childhood through adult development as a dynamic organic process in time, thus integrating the study of heterochrony and chronobiology with morphology, physiology and consciousness. In (...) addition to revealing compelling convergences with the classic work of Gebser on consciousness structures, this Goethian tradition reveals significant parallels with contemporary studies in the realm of biophysics, the science of complexity and eastern spiritual traditions which regard the body as a coherent field, manifesting dynamic, directed currents of development that can be traced and mapped out. These paradigms recognize the importance of recursive organizing principles that structure the biosphere's spatial dimensions and, in the temporal realm, structure long- and short-term evolutionary cycles. The marriage of Gebserian cultural philosophies with Goethean biology, the science of complexity and eastern praxis traditions leads to a simple, elegant and remarkably broad appreciation of the fundamental role of consciousness as an essential property of dynamic living systems. This synthesis helps address many of the difficult questions faced by students of consciousness in a relatively simple and straightforward manner, beginning with a focus on our own species and close mammalian relatives. Two main conclusions arise from this synthesis. First, although enjoying increased attention recently, the Gebserian and Goethean paradigms were far ahead of their time and so have been overlooked. Second, consciousness must be regarded as a primary biologically-embedded datum of life/existence and not merely an epiphenomenon associated with the function of localized or specific organs. (shrink)

The article discusses an actual problem of the contemporary social theory – a problem of post-postmodernism that is the answer to the question: what comes to replace the supposedly outdated postmodernism. Post-postmodernism in an umbrella term that brings together various concepts like digimodernism, automodernism, metamodernism, hypermodernism, supermodernism, etc. One of the replacing postmodernism theories is the French curator and art theorist Nicolas Bourriaud’s concept that was called “altermodern” or “other modernism.” In his previous books Bourriaud proposed to rewrite modernism and, (...) as the result, developed a new theory. The concept appeared in 2009 when Bourriaud presented the exhibition in London, timed to the publication of his manifesto Altermodern, and edited and published the book of collected papers of the same title. Globalization, which opened borders for art, is a central concept of the altermodernism theory. The main terms of altermodern are heterochrony (time diversity) and viatorisation (nomadism). The main social subject of the alternodern era is a free travelling artist, who interprets the meanings of “rewritten” art for the public. They are “rewritten” because Bourriaud proposes to use phenomena and products of past ages to make them work in a new way. However Bourriaud’s concept should be considered critically, as it was formerly done by several researchers. The article proposes a critical review that answers to the question: to what extent the idea of altermodern is heuristic and therefore it could compete with other concepts that abolish postmodern. The author gives a negative answer to this question first of all because altermodern just borrows a lot of elements of the language and apparatus of postmodernism and actually does not offer anything new. (shrink)

Variation or rearrangement of regulatory genes is responsible for cellular malignant change. These types of chromosomal variations also produce heterochrony or paedomorphic evolution at the organismal level. Analogously, neoplasia represents a cellular macroevolutionary event, and a tumour can be said to be an evolved population of cells. To understand this cellular evolution to malignancy, it may be necessary to go beyond a clonal selection (adaptationist) explanation of neoplastic alteration. In the pericellular environment natural selection consists of the organizational restraints (...) of surrounding cells as well as the host's immunological surveillance and non-specific monocyte-macrophage systems. Indirect evidence suggests that success for the neoplasm depends not upon clonal selection, but solely upon a genetic methodology—the function of which is to elude selection.The author has coined the term cellular heterochrony to illustrate analogic similarities in the molecular modes of speciation between anaplastic cancer cells and the heterochronic evolution of organisms. By reverting to a juvenile (embryonic) repertoire of cellular behaviour a tumour secures its own tenure or niche by usurping the host's armamentarium of selection forces, employing many of the same or similar methods by which implanting and invading tissues of the mammalian embryo forestall maternal detection and rejection. A number of ways by which the tumour blocks, subverts or evades selection are discussed. (shrink)

The evolution of development can be made accessible to study by exploiting closely related species that exhibit distinct ontogenies. The direct‐developing sea urchin Heliocidaris erythrogramma is closely related to indirect‐developing sea urchins that develop via a feeding larval stage. Superficial consideration would suggest that simple heterochronies resulting in loss of larval features and acceleration of adult features could explain the substitution of direct for indirect development. However, our experiments show that early development has in fact been extensively remodeled, with modified (...) localization of maternal determinants coupled with dissociation of cell cleavage from axis formation resulting in novel patterns of cell lineage differentiation and fate map. Gene expression has undergone concomitant changes. (shrink)

Marine interstitial environments are teeming with an extraordinary diversity of coexisting microeukaryotic lineages collectively called “meiofauna.” Interstitial habitats are broadly distributed across the planet, and the complex physical features of these environments have persisted, much like they exist today, throughout the history of eukaryotes, if not longer. Although our general understanding of the biological diversity in these environments is relatively poor, compelling examples of developmental heterochrony (e.g., pedomorphosis) and convergent evolution appear to be widespread among meiofauna. Therefore, an improved (...) understanding of meiofaunal biodiversity is expected to provide some of the deepest insights into the following themes in evolutionary biology: (i) the origins of novel body plans, (ii) macroevolutionary patterns of miniaturization, and (iii) the intersection of evolution and community assembly – e.g., “community convergence” involving distantly related lineages that span the tree of eukaryotes. (shrink)

Addressing attempts to define a common European memory on the theme of the Holocaust, and transformations of the Cold War discourses on totalitarianism and democracy. The article conceptualizes the persistent forms and new constellations of alterity that reproduce an East—West divide. The article shows that cognitive debates about Europe hint at constantly shifting relations between various parts of Europe and between Europe and its neighbors. A relational conceptual vocabulary is proposed to describe the debates on Europe following 1989. Cleavages and (...) social distancing can be expressed in terms of different temporal locations (allochronism) which, when merged with a normative stance, can lead to a situation of heterochrony. (shrink)

Organic selection (the Baldwin Effect) by which an environmentally elicitedphenotypic adaptation comes under genotypic control following selectionwas proposed independently in 1896 by the psychologists James Baldwinand Conwy Lloyd Morgan and by the paleontologist Henry Fairfield Osborn.Modified forms of organic selection were proposed as autonomization bySchmalhausen in 1938, as genetic assimilation by Waddington in 1942, andas an explanation for evolution in changing environments or for speciationby Matsuda and West-Eberhard in the 1980s. Organic selection as amechanism mediating proximate environmental effects on the (...) evolution ofmorphology and behaviour is the topic of this essay. Discussion includesthe context in which organic selection was proposed, Lamarckian or neo-Lamarckian implications of organic selection, Waddingtons experimentalstudies demonstrating the existence and efficacy of genetic assimilation,stabilizing selection and norms of reaction favoured by Schmalhausen, andMatsudas search for a mechanism of organic selection in endocrine changesand in heterochrony. (shrink)

In the article the author reflects on the meaning of politics in a newmaterialist framework. She concentrates predominantly on two political dimentions – space and time. With reference to that, the author develops the concept of politics of squatting. Its spatial aspect is investigated along the lines of the notion of heterotopia, coined by Michel Foucault, and its temporal aspect is analyzed through the concept of heterochrony and Darwinian evolution as interpreted by Elizabeth Grosz. The concept of politics of (...) squatting is then juxtaposed with nomadism. Finally, the author provides a case study by elaborating on the anti-gender campaign that began in 2012-2013 in Poland from the perspective of politics of squatting. (shrink)

Frequent independent origins of environmental sex determination (ESD) are assumed within amniotes. However, the phylogenetic distribution of sex‐determining modes suggests that ESD is likely very ancient and may be homologous across ESD groups. Sex chromosomes are demonstrated to be old and stable in endothermic (mammals and birds) and many ectothermic (non‐avian reptiles) lineages, but they are mostly non‐homologous between individual amniote lineages. The phylogenetic pattern may be explained by ancestral ESD with multiple transitions to later evolutionary stable genotypic sex determination. (...) It is pointed out here that amniote ESD shares several key aspects with sequential hermaphroditism of fishes such as a lack of sex differences in genomes, biased population sex ratios, and potentially also molecular mechanism related to general stress responses. Here, it is speculated that ESD evolves via a heterochronic shift of the sensitive period of sex change from the adult to the embryonic stage in a hermaphroditic amniote ancestor. Also see the video abstract here https://youtu.be/q2mjtlCefu4. (shrink)

How does evolution grow bigger brains? It has been widely assumed that growth of individual structures and functional systems in response to niche-specific cognitive challenges is the most plausible mechanism for brain expansion in mammals. Comparison of multiple regressions on allometric data for 131 mammalian species, however, suggests that for 9 of 11 brain structures taxonomic and body size factors are less important than covariance of these major structures with each other. Which structure grows biggest is largely predicted by a (...) conserved order of neurogenesis that can be derived from the basic axial structure of the developing brain. This conserved order of neurogenesis predicts the relative scaling not only of gross brain regions like the isocortex or mesencephalon, but also the level of detail of individual thalamic nuclei. Special selection of particular areas for specific functions does occur, but it is a minor factor compared to the large-scale covariance of the whole brain. The idea that enlarged isocortex could be a a by-product of structural constraints later adapted for various behaviors, contrasts with approaches to selection of particular brain regions for cognitively advanced uses, as is commonly assumed in the case of hominid brain evolution. (shrink)

This paper argues that much of Jacques Rancière’s redefinition of emancipation owes a lot to one key character from his archival research on nineteenth-century worker-poets, Louis-Gabriel Gauny, the self-proclaimed plebeian philosopher. This is especially the case in regard to Rancière’s understanding of subjectivation forming a double of the self and a double of social reality as worlds within worlds. The paper puts forward that Gauny’s form of emancipation is valid today as an aesthetic revolution that reveals Rancière’s practices of equality (...) to be an emancipatory way of life. In doing so, it will engage with Gauny’s connection with the contemporary precariat. (shrink)