Results 31 to 40 of about 1,869 (195)

First record of the Ordovician fauna in Mila-Kuh, eastern Alborz, northern Iran [PDF]

Estonian Journal of Earth Sciences, 2015
Restudy of the Cambrian–Ordovician boundary beds, traditionally assigned to the Mila Formation Member 5 in Mila-Kuh, northern Iran, for the first time provides convincing evidence of the Early Ordovician (Tremadocian) age of the uppermost part of the ...
Mohammad-Reza Kebria-ee Zadeh, Mansoureh Ghobadi Pour, Leonid E. Popov, Christian Baars, Hadi Jahangir   +4 more
doaj   +1 more source

The development of the Silurian trilobite Aulacopleura koninckii reconstructed by applying inferred growth and segmentation dynamics: A case study in paleo-evo-devo [PDF]

, 2017
Fossilized growth series provide rare glimpses into the development of ancient organisms, illustrating descriptively how size and shape changed through ontogeny.
Fusco, Giuseppe, Hong, Paul S., Hou, Jinbo, Hughes, Nigel C.   +3 more
core   +2 more sources

Ontogeny of the trilobite Elrathia kingii (Meek) and comparison of growth rates between Elrathia kingii and Aulacopleura koninckii (Barrande)

Papers in Palaeontology, Volume 7, Issue 2, Page 985-1002, May 2021., 2021
Abstract Trilobites offer almost unparalleled insight into the growth and development of fossil ecdysozoans. Here I use newly collected material of Elrathia kingii (Meek) to estimate growth rates and describe shape change over the ontogeny of E. kingii.
Melanie J. Hopkins, Javier Álvaro
wiley   +1 more source

Die Gattung Erratencrinurus Krueger, 1971 (Trilobita; Ordovizium) aus baltoskandischen Geschieben [PDF]

Fossil Record, 2004
Aus der mittel- bis oberordovizischen Trilobitenfamilie Encrinuridae, die in Baltoskandia durch die Untergattungen Erratencrinurus und Celtencrinurus repräsentiert wird, werden achtzehn Arten beschrieben, darunter die vier neuen Arten Erratencrinurus (E.)
H.-H. Krueger
doaj   +3 more sources

A new Late Ordovician bubble-headed trilobite species from South West Wales and its implications for biostratigraphy [PDF]

Acta Palaeontologica Polonica
A new species of bubble-headed trilobite, Staurocephalus oliveae sp. nov., is described from 250 specimens collected from a recently discovered locality in the Sholeshook Limestone Formation (upper Katian, Upper Ordovician; Ashgill, Cautleyan Zone 1 ...
MANUS G. LEIDI, LUCY M.E. MCCOBB, PATRICK D. MCDERMOTT, ALAN W. OWEN   +3 more
doaj   +1 more source

The only known cyclopygid–‘atheloptic’ trilobite fauna from North America: the upper Ordovician fauna of the Pyle Mountain Argillite and its palaeoenvironmental significance [PDF]

, 2012
The trilobite fauna of the upper Ordovician (middle Katian) Pyle Mountain Argillite comprises a mixture of abundant mesopelagic cyclopygids and other pelagic taxa and a benthic fauna dominated by trilobites lacking eyes.
Adrain, ALAN W. OWEN, Angelin, Apollonov, Barrande, Bartholomew, Bergström, Beyrich, Boucot, Bruton, Brøgger, Budil, Cocks, Cocks, Cooper, Dalman, DAVID L. BRUTON, Dean, Dean, Dean, Fortey, Fortey, Fortey, Fortey, Fortey, Fortey, Gürich, Hammann, Hammann, Hammann, Hansen, Hawle, Horný, Hörbinger, Ingham, Ingham, Ingham, Jaekel, Jell, Ji, Kaesler, Kielan, Kielan, Kobaysahi, Kolobova, Kozák, Krueger, Kutorga, Lane, Lespérance, Lespérance, Linnarsson, Lu, Lu, M'Coy, Marek, Marek, McCormick, Morris, Nicholson, Nicholson, Nielsen, Nielsen, Owen, Owen, Owen, Owen, Owen, Owen, Parkes, Pek, Pek, Prantl, Price, Přibyl, Raymond, Reed, Reed, Reed, Reed, Repina, Rong, Ross, Roy, Salter, Schrank, Shaw, Shaw, Sheehan, Shergold, Shergold, Thomas, Volborth, Warburg, Weir, Whittard, Whittard, Whittington, Whittington, Whittington, Whittington, Whittington, Whittington, Whittington, Zhou, Zhou, Zhou, Zhou, Zhou, Zhou, Zhou, Zhou, Šnajdr   +112 more
core   +1 more source

New agnostina (Trilobita) from the Llanvirn (Ordovician) of Spain

Estudios Geologicos, 1985
Se estudian los trilobites agnóstidos procedentes de nueve localidades, siete de ellas nuevas para estas faunas, situadas en las pizarras del Llanvirn inferior de la parte meridional de la Zona Centroibérica (Montes de Toledo, Villuercas y región de ...
I. Rábano, H. Pek, J. Vaněk
doaj   +1 more source

Hirnantia sagittifera (Brachiopoda) and Mucronaspis mucronata s.l. (Trilobita) in the Upper Ordovician of the East Baltic: taxonomy and distribution [PDF]

Estonian Journal of Earth Sciences, 2012
The brachiopod Hirnantia sagittifera (M’Coy) and trilobite morphs of the genus Mucronaspis from the topmost Ordovician Porkuni Stage of the central East Baltic are described and compared with those from the Hirnantian Stage of other regions.
Linda Hints, Helje Pärnaste, Lilita-Ilga Gailite†   +2 more
doaj   +1 more source

Shelly fossils from the lower Cambrian White Point Conglomerate, Kangaroo Island, South Australia [PDF]

Acta Palaeontologica Polonica, 2019
The lower Cambrian (Series 2) White Point Conglomerate (WPC) on Kangaroo Island, South Australia contains exotic clasts representing a diverse array of lithologies, including metamorphics, chert, sandstone, and abundant carbonates, notably archaeocyath ...
Marissa J. Betts, Thomas M. Claybourn, Glenn A. Brock, James B. Jago, Christian B. Skovsted, John R. Paterson   +5 more
doaj   +1 more source

Metacryphaeus rotundatus, um novo elemento da fauna de trilobites calmoniidae (phacopida), da formação Ponta Grossa (devoniano), bacia do Paraná, Brasil [PDF]

Geologia USP. Série Científica, 2008
Trilobites Calmoniidae (Delo, 1935) constituem o grupo de Phacopida mais abundante e diversificado do registro fóssil da Formação Ponta Grossa, Devoniano, Sub-bacia Apucarana. Embora conhecidos desde o início do século passado, o estudo dos trilobites da
Sabrina Pereira Soares, Marcello Guimarães Simões, Juliana de Moraes Leme   +2 more
doaj   +2 more sources