The Early Devonian ischnacanthiform acanthodian Ischnacanthus gracilis (Egerton, 1861) from the Midland Valley of Scotland

Burrow, C. J.; Newman, M.; den Blaauwen, J.; Jones, R.; Davidson, R.

doi:10.1515/agp-2018-0008

Artykuł - szczegóły

Tytuł artykułu

The Early Devonian ischnacanthiform acanthodian Ischnacanthus gracilis (Egerton, 1861) from the Midland Valley of Scotland

Autorzy

Burrow C. J. , Newman M. , den Blaauwen J. , Jones R. , Davidson R.

Treść / Zawartość

Pełne teksty:

Pobierz

Identyfikatory

DOI

10.1515/agp-2018-0008

Warianty tytułu

Konferencja

Proceedings of the 14th International Symposium on Early and Lower Vertebrates

Języki publikacji

Abstrakty

Ischnacanthus gracilis (Egerton, 1861), the only ischnacanthiform acanthodian from the Lochkovian Lower Old Red Sandstone of Scotland, is known from hundreds of specimens in institutional collections worldwide. Despite this relative abundance, morphology and histology of its skeletal elements have rarely been investigated. Surface details of spines, dental elements, and scales are often not visible in specimens because they are usually split through the middle. We have examined a broad size range of fish, from 35 mm to 250 mm long. Several intact (not split) specimens have been collected in recent years and acid-prepared to show fine details of the dermal and dental elements. We have also used scanning electron microscopy of scales, jaws and dental elements, denticles and fin spines, and serial thin sectioning of articulated specimens, to document their structure. Some of our notable observations include: identification of ventral lateral lines, double-layered subtessellate calcified cartilage forming the jaws, and the probable occurrence of extraoral tricuspid denticles on the jaws of most fish. Examination of the size range, body proportions and dentition of institutional specimens gives no support for recognising more than one species in the Midland Valley localities.

Słowa kluczowe

Acanthodii Ischnacanthus Lochkovian palaeohistology dentition

fałdopłetwe akantody lochkov dewon wczesny paleohistologia uzębienie

Wydawca

Faculty of Geology of the University of Warsaw
Komitet Nauk Geologicznych PAN

Czasopismo

Acta Geologica Polonica

Rocznik

2018

Tom

Vol. 68, no. 3

Strony

335--362

Opis fizyczny

Bibliogr. 106 poz., rys.

Twórcy

autor

Burrow C. J.

carole.burrow@gmail.com

Geosciences, Queensland Museum, 122 Gerler Rd, Hendra 4011, Queensland, Australia

autor

Newman M.

Vine Lodge, Vine Road, Johnston, Haverfordwest, Pembrokeshire, SA62 3NZ, UK

autor

den Blaauwen J.

University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, Netherlands

autor

Jones R.

6 Burghley Road, Wimbledon, London, SW19 5BH, UK

autor

Davidson R.

35 Millside Road, Peterculter, Aberdeen, AB14 0WG, UK

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-b5b557e1-f68d-4776-a8c0-f6020bcc09ae