A new Middle Devonian (Givetian) psammosteid (Vertebrata : Heterostraci) from Poland

• Autorzy: Dec Marek

Identyfikatory

DOI

10.14241/asgp.2020.04

• Języki publikacji: EN

Abstrakty

EN

A new genus and species of psammosteid heterostracan, Psarkosteus mediocris gen. et sp. nov., is described from the Middle Devonian (Givetian) of the Skały Formation, the Holy Cross Mountains, Poland. The dorsal plate of Psarkosteus is constricted in its anterior part and the postorbital plate is long and narrow. Both features, along with the morphology and variety of tubercles, distinguish it from other representatives of the group. Most distinctive are big, teardrop-shaped tubercles, each with a flat or slightly concave surface and with its tip directed posteriorly, and a crenulated base, located along the branchial plates. The lateral line system in Psarkosteus is similar to that of Drepanaspis gemuendenensis and confirms earlier reconstructions.

Słowa kluczowe

EN

Pteraspidomorphi; Heterostraci; Psammosteidae; Middle Devonian; Holy Cross Mountains; Manuscript received

• Wydawca: Polskie Towarzystwo Geologiczne
• Czasopismo: Annales Societatis Geologorum Poloniae
• Rocznik: 2020
• Tom: Vol. 90, No. 1
• Strony: 75--93
• Opis fizyczny: Bibliogr. 35 poz., rys., wykr.

Twórcy

autor

Dec Marek

• Institute of Palaeobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).