The histology and function of the dermal armour of the aetosaur Stagonolepis olenkae Sulej, 2010 (Archosauria, Pseudosuchia) from Krasiejów (SW Poland)

• Autorzy: Błaszczeć Przemysław , Antczak Mateusz

Identyfikatory

DOI

10.24425/agp.2024.152660

• Języki publikacji: EN

Abstrakty

EN

Microscopic observations of the bone tissues of osteoderms covering an animal’s body can provide an insight into its lifestyle and ontogeny as well as reveal the function of the armour. In the case of the aetosaur Stagonolepis olenkae Sulej, 2010 from the locality of Krasiejów, to date only the paramedian osteoderms have been analysed and compared to other taxa within Pseudosuchia Zittel, 1887. This study examines ten disarticulated plates from different parts of the body of S. olenkae: paramedian, lateral, ventral and appendicular osteoderms. The armour of S. olenkae has a diploe structure composed of layers of external and basal cortex surrounding an internal cancellous core. In the basal layer of the osteoderms, bundles of Sharpey’s fibres and skeletochronological structures are present. The internal structures of the osteoderms indicate extensive remodelling processes, and the weak vascularization and bone tissues that constitute the plates – lamellar bone and parallel-fibred bone– suggest considerable mechanical resistance. Elements of the armour’s osteology adapted to distribute and reduce mechanical stress might provide confirmation of the protective function of the armour as well.

Słowa kluczowe

EN

Aetosauria; Stagonolepis; Osteoderms; Palaeohistology

PL

Aetozaury; Stagonolepis; Osteodermy; Paleohistologia

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2025
• Tom: Vol. 75, no. 1
• Strony: art. no. e38
• Opis fizyczny: Bibliogr. 83 poz., rys., tab.

Twórcy

autor

Błaszczeć Przemysław

• Institute of Geology, Adam Mickiewicz University

autor

Antczak Mateusz

• Institute of Biology, University of Opole

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2026).