Results 31 to 40 of about 80,006 (331)
Current Biology, 2002 What is it? Many things, but all connected to the emergence of the principal metazoan phyla, that is the assembly of the triploblastic body plans in three superclades — deuterostomes (you and sea-urchins), ecdysozoans (worm, flies and, oh yes, penis worms), and lophotrochozoans (annelids, brachiopods, molluscs).
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A new euarthropod from the Cambrian Stage 4 Guanshan Biota of South China [PDF]
Acta Palaeontologica Polonica, 2022 A new small euarthropod Astutuscaris bispinifer gen. et sp. nov. is described from the early Cambrian Stage 4 Guanshan Biota in Yunnan, China. This new euarthropod possesses a wide head shield, a pair of possible eyes, paired frontalmost appendages ...
DE-GUANG JIAO, KUN-SHENG DU
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Cambrian Chordates and Vetulicolians [PDF]
Geosciences, 2019 Deuterostomes make a sudden appearance in the fossil record during the Early Cambrian. Two deuterostome groups, the chordates and the vetulicolians, are of particular interest for understanding the evolutionary dynamics of the Cambrian evolutionary event.
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Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]
, 2001 The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Aharon P. +55 more
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Литосфера, 2018 Granitoids of Ishirim anticlinorium which is one of the major Precambrian structures of the North Urals, are poorly studied by modern geochemical and isotope-geochronological methods that led to the existence of different points of view on formation ...
Georg A. Petrov +2 more
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Engineering the Cambrian explosion: the earliest bioturbators as ecosystem engineers [PDF]
, 2017 By applying modern biological criteria to trace fossil types and assessing burrow morphology, complexity, depth, potential burrow function and the likelihood of bioirrigation, we assign ecosystem engineering impact (EEI) values to the key ichnotaxa in ...
Callow, Richard H. T. +3 more
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Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics [PDF]
Acta Palaeontologica Polonica, 2021 Cambrian Series 2 shelly fossils from thick carbonate successions in East Antarctica have received limited systematic treatment through the 20th century.
Thomas M. Claybourn +5 more
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Grueneberg ganglion olfactory subsystem employs a cGMP signaling pathway [PDF]
, 2009 The mammalian olfactory sense employs several olfactory subsystems situated at characteristic locations in the nasal cavity to detect and report on different classes of odors. These olfactory subsystems use different neuronal signal transduction pathways,
Fraser, Scott E. +2 more
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