Results 141 to 150 of about 3,386 (197)

Distinct causes underlie double-peaked trilobite morphological disparity

Drage HB, Pates S.
europepmc   +1 more source

Does intraspecific variation in juvenile Late Cretaceous ammonoids correlate with their systematic position, longevity and paleogeography? [PDF]

Swiss J Palaeontol
Tajika A, Iida T, Wani R, Landman NH, Ikuno K, Klug C.   +5 more
europepmc   +1 more source

Advanced adaptive strategies in an ancestral body plan: insights from a 510-Ma-old leptomitid sponge. [PDF]

R Soc Open Sci
Luo C, Hong Y, Sun Z, Sun H, Lim SC, Wang T, Zhang L, Zhao F.   +7 more
europepmc   +1 more source

Archaeology and traversing America's pre-Columbian fault line. [PDF]

Proc Natl Acad Sci U S A
Thomas DH.
europepmc   +1 more source

The first leech body fossil predates estimated hirudinidan origins by 200 million years. [PDF]

PeerJ
de Carle D, Iwama RE, Wendruff AJ, Babcock LE, Nanglu K.   +4 more
europepmc   +1 more source

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Trilobites☆

2016
exaly   +3 more sources

Purujosa trilobite assemblage and the evolution of trilobite enrollment

Geology, 2011
Localities bearing abundant enrolled Cambrian trilobites are extremely rare, but here we report a new and exceptional such assemblage with a high diversity of enrolled specimens from the middle Cambrian of Spain. This novel find demonstrates that encapsulated enrollment was a behavioral response available to many of the early benthic trilobite morpho ...
Jorge Esteve, Nigel C. Hughes, Samuel Zamora   +2 more
openaire   +1 more source

Respiration in trilobites: A reevaluation

GFF, 2008
Abstract It has often been taken for granted that the outer branch of trilobite limbs had a gill function. Since there are no thorough analyses of the case, we decided to make an attempt. Morphological characteristics of arthropod gills are defined. There is a need for a large area/volume ratio with a cuticle thin enough to perform gaseous exchange and
Yutaro Suzuki, Jan Bergstrom
openaire   +1 more source

A Devonian Trilobite with an Eyeshade

Science, 2003
Trilobites include the oldest species with preserved eyes for which detailed optical mechanisms have been suggested. They appear in the Cambrian, and in comparison to other species present then, trilobites already had unusually sophisticated eyes with lenses made out of the mineral calcite ( [1 ...
Richard, Fortey, Brian, Chatterton
openaire   +2 more sources

The Trilobite

Ploughshares, 2015
Acclaimed publisher and editor Neil Astley, founder of Bloodaxe Books, guest-edits this special transatlantic all-poetry issue, featuring poets from North America, Great Britain, and Ireland. The issue contains a stirring diversity of work, with writers who have roots everywhere from Guyana to Pakistan to Zambia, and also features poetry in Welsh ...
openaire   +1 more source