Die Regeneration der Coleopteren

Megušar, Franz

doi:10.1007/bf02292166

Cited by 16 publications

(3 citation statements)

References 6 publications

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“…Prior to this study, the only indications for posterior axial regeneration in arthropods stem from some amputation experiments on insect larvae and pycnogonids from the turn of the 19th to the 20th century ( 16 , 41 , 42 ). However, these studies suffered from extremely high mortality rates of treated animals, as well as often only partial ablation of terminal segments or insufficient characterization of the regenerated structures' internal anatomy.…”

Section: Discussionmentioning

confidence: 99%

The sea spider Pycnogonum litorale overturns the paradigm of the absence of axial regeneration in molting animals

Brenneis

Frankowski

Maaß

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Regenerative abilities and their evolution in the different animal lineages have fascinated generations of biologists. While some taxa are capable of restoring entire individuals from small body fragments, others can regrow only specific structures or lack structural regeneration completely. In contrast to many other protostomes, including the segmented annelids, molting animals (Ecdysozoa) are commonly considered incapable of primary body axis regeneration, which has been hypothesized to be linked to the evolution of their protective cuticular exoskeleton. This holds also for the extraordinarily diverse, segmented arthropods. Contradicting this long-standing paradigm, we here show that immatures of the sea spider Pycnogonum litorale reestablish the posterior body pole after transverse amputation and can regrow almost complete segments and the terminal body region, including the hindgut, anus, and musculature. Depending on the amputation level, normal phenotypes or hypomeric six-legged forms develop. Remarkably, also the hypomeric animals regain reproductive functionality by ectopic formation of gonoducts and gonopores. The discovery of such complex regenerative patterns in an extant arthropod challenges the hitherto widely assumed evolutionary loss of axial regeneration during ecdysozoan evolution. Rather, the branching of sea spiders at the base of Chelicerata and their likely ancestral anamorphic development suggests that the arthropod stem species may have featured similar regenerative capabilities. Accordingly, our results provide an incentive for renewed comparative regeneration studies across ecdysozoans, with the aim to resolve whether this trait was potentially even inherited from the protostome ancestor.

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Section: Discussionmentioning

confidence: 99%

The sea spider Pycnogonum litorale overturns the paradigm of the absence of axial regeneration in molting animals

Brenneis

Frankowski

Maaß

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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“…Megusar (1907) opère sur Tenebrio molitor, Oryctes nasicornis, Rhagium inquisitor et obtient des régénérations commençant dès la mue suivante. Au contraire, avec des Hydrophiles et des Dyti ques, la régénération n'a lieu qu'après la mue nymphale ; il observe une fois un régénérat double.…”

Section: Action Sur La Larve Et La Nympheunclassified

La tératologie des Tiques (fin)

Campana-Rouget¹

1959

Ann. Parasitol. Hum. Comp.

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Anomalies du scutumHyalomma anatolicum. Pervomaisky 1954.Deux femelles présentent des déformations importantes du scutum : l'une montre une échancrure profonde dans la région postérieure médiane du scutum ; chez l'autre, la partie droite du scutum manque et les yeux sont asymétriques. Asymétrie des stigmatesAmblyomma hebraeum Koch. Mozambique. T. Santos Dias 1947.Trois exemplaires. Les stigmates sont asymétriques et il manque des festons ( fig. 61).

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“…und Metathorax an Tenebrio-Larven im Stadium vor der letzten Hiiutung erzielte, wie bereits zitiert, auch MEGU~AR [5] bei der Puppe verkUrzte FlUgel mit dem Charakter yon Regeneraten.…”

Section: Versuchsablaufunclassified

Regeneration des Dipterenflügels beim Imago

Kammerer¹

1907

Archiv für Entwicklungsmechanik der Organismen

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Die Regeneration der Coleopteren

Cited by 16 publications

References 6 publications

The sea spider Pycnogonum litorale overturns the paradigm of the absence of axial regeneration in molting animals

The sea spider Pycnogonum litorale overturns the paradigm of the absence of axial regeneration in molting animals

La tératologie des Tiques (fin)

Regeneration des Dipterenflügels beim Imago

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