Results 121 to 130 of about 874 (171)
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Respiration in trilobites: A reevaluation
GFF, 2008Abstract 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
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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 ...
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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 ...
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Development of eodiscinid trilobites
Biological ReviewsABSTRACTA comprehensive review of a full developmental sequence of eodiscinid trilobites reported in recent decades from Cambrian Series 2 and 3 strata is presented. These mostly articulated specimens exhibit detailed morphologies with preservation of even delicate structures at different growth stages, such as the bacculae, axial pores, spine pores ...
Tao Dai, Xingliang Zhang
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Biological Reviews, 1957
Summary1. Terminology is explained, and the importance emphasized of work, mostly published during the last 10 years, on extraordinarily wellâpreserved exoskeletons replaced by quartz. The need for a reconsideration of theories derived from ontogenetic studies is evident.2. The protaspis is of subâhemispherical to spherical form, i mm.
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Summary1. Terminology is explained, and the importance emphasized of work, mostly published during the last 10 years, on extraordinarily wellâpreserved exoskeletons replaced by quartz. The need for a reconsideration of theories derived from ontogenetic studies is evident.2. The protaspis is of subâhemispherical to spherical form, i mm.
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Upper Cambrian agnostoid trilobites from the Machari Formation, Yongwol, Korea
Geobios, 2004Duck K. Choi
exaly