ArticleJournal of anatomy2015
Long bone histology of the stem salamander Kokartus honorarius (Amphibia: Caudata) from the Middle Jurassic of Kyrgyzstan.
Article in Journal of anatomy, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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18 citing papers in PubMed, 27 citations in OpenAlex.
- Diverse ossification pathways in the lower jaw of Sclerocephalus (Lower Permian) as revealed by the first record of chondroid bone in Amphibia.Scientific reports · 2026Article
- Interdisciplinarity of secondary osteons: relevance of bioarchaeological and palaeontological research in biomedical cortical bone histology studies.Bone reports · 2026Review
- Pedicellate Teeth in Archaic Salamanders (Lissamphibia, Caudata).Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections · 2025Article
- Unique bone histology of modern giant salamanders: a study on humeri and femora of Andrias spp.Zoological letters · 2024Article
- The salamander limb: a perfect model to understand imperfect integration during skeletal regeneration.Biology open · 2024Review
- Fossil bone histology reveals ancient origins for rapid juvenile growth in tetrapods.Communications biology · 2022Article
- Biogeographic history of Palearctic caudates revealed by a critical appraisal of their fossil record quality and spatio-temporal distribution.Royal Society open science · 2022Article
- Middle Jurassic fossils document an early stage in salamander evolution.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- A Triassic stem-salamander from Kyrgyzstan and the origin of salamanders.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- A new small-sized stem salamander from the Middle Jurassic of Western Siberia, Russia.PloS one · 2020Article
- Braincase simplification and the origin of lissamphibians.PloS one · 2019Article
- Common occurrence of Sharpey's fibres in amphibian phalanges.Zoomorphology · 2018Article
- The first record of albanerpetontid amphibians (Amphibia: Albanerpetontidae) from East Asia.PloS one · 2018Article
- Evidence for complex life cycle constraints on salamander body form diversification.Proceedings of the National Academy of Sciences of the United States of America · 2017Article
- Long bone histology of the stem salamander Kokartus honorarius (Amphibia: Caudata) from the Middle Jurassic of Kyrgyzstan.Journal of anatomy · 2015Article
- Article
- Fossils, molecules, divergence times, and the origin of Salamandroidea.Proceedings of the National Academy of Sciences of the United States of America · 2012Article
- Late Jurassic salamandroid from western Liaoning, China.Proceedings of the National Academy of Sciences of the United States of America · 2012Article
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2 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Kokartus honorarius from the Middle Jurassic (Bathonian) of Kyrgyzstan is one of the oldest salamanders in the fossil record, characterized by a mixture of plesiomorphic morphological features and characters shared with crown-group salamanders. Here we present a detailed histological analysis of its long bones. The analysis of a growth series demonstrates a significant histological maturation during ontogeny, expressed by the progressive appearance of longitudinally oriented primary vascular canals, primary osteons, growth marks, remodelling features in primary bone tissues, as well as progressive resorption of the calcified cartilage, formation of endochondral bone and development of cartilaginous to bony trabeculae in the epiphyses. Apart from the presence of secondary osteons, the long bone histology of Kokartus is very similar to that of miniaturized temnospondyls, other Jurassic stem salamanders, miniaturized seymouriamorphs and modern crown-group salamanders. We propose that the presence of secondary osteons in Kokartus honorarius is a plesiomorphic feature, and the loss of secondary osteons in the long bones of crown-group salamanders as well as in those of miniaturized temnospondyls is the result of miniaturization processes. Hitherto, all stem salamander long bong histology (Kokartus, Marmorerpeton and 'salamander A') has been generally described as having paedomorphic features (i.e. the presence of Katschenko's Line and a layer of calcified cartilage), these taxa were thus most likely neotenic forms. The absence of clear lines of arrested growth and annuli in long bones of Kokartus honorarius suggests that the animals lived in an environment with stable local conditions.
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