Search results for "Frasnian"
showing 2 items of 2 documents
Zemes un vides zinātnes (Latvijas Universitātes Raksti; 783. sēj.)
2012
Šis LU Rakstu speciālais sējums satur rakstus, kas balstās uz dažiem 8. Baltijas stratigrāfijas konferences sniegtiem ziņojumiem un aptver galvenokārt paleontoloģijas un stratigrāfijas tēmas, kā arī lietišķās ģeoloģijas aspektus. Daži no ziņojumiem jau ir publicēti vai tuvākā nākotnē tiks iespiesti arī citos zinātniskos žurnālos. The current special volume of the Acta Universitatis Latviensis comprises the papers submitted by participants of the Eighth Baltic Stratigraphical Conference (8 th BSC) held in Riga, Latvia, on 28 August – 2 September 2011.
Revision of asterolepidoid antiarch remains from the Ogre Formation (Upper Devonian) of Latvia
2020
The Frasnian (Upper Devonian) antiarch Walterilepis speciosa was first described in 1933 (as Taeniolepis) on the basis of a single specimen. The newly collected material has allowed the head to be described in a more detail, especially the nuchal and paranuchal plates. Other newly described elements include bones of the pectoral appendages and trunk armour, demonstrating a rather high and short trunk armour. The shape and proportions of the head and trunk armour suggest the attribution of Walterilepis to the family Pterichthyodidae; it is most probably closely related to Lepadolepis from the Late Frasnian of Germany. Whilst W. speciosa is endemic to the Latvian part of the Baltic Devonian B…