Results 11 to 20 of about 46,727 (276)
Origin of Tracheæ in Arthropoda [PDF]
IN NATURE (vol. xvii. p. 284) is a notice of a work by Dr. Palmen, of Helsingfors, on the morphology of the tracheal system. From the wording of the notice it appears as if the views of Dr. Palmen as to the origin of tracheae from skinglands, and as to the importance of Peripatus as an ancestral form of the Tracheata, were new to science. I was, to the
Henry Moseley
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THE SPERMATOZOON OF ARTHROPODA [PDF]
In this work the spermatozoon of Chloeon dipteron (Ephemeroptera) is examined. The three most important features are that (a) the acrosome is very brief; (b) the mitochondrial derivative is represented by a long mitochondrion with transverse cristae and by a crystalline mass enveloped in a separated membrane; (c) the axial filament of the tail lacks ...
B. Baccetti+2 more
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SOME COMMENTS ON THE EVOLUTION OF THE ARTHROPODA [PDF]
Howard E. Evans
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Abstract Compiling trait information promotes discovery and innovation in using trait‐based approaches in ecology. Various zooplankton trait datasets are stored in unlinked data repositories, in diverse data structures, and have varying levels of complexity.
Patrick R. Pata, Brian P. V. Hunt
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Published as part of Burks, Roger A. & Heraty, John M., 2020, First described fossil representatives of the parasitoid wasp taxa Asaphesinae n. n. and Eunotinae (Hymenoptera: Chalcidoidea: Pteromalidae sensu lato) from Eocene Baltic amber, pp. 801-812 in Journal of Natural History 54 (9) on page 803, DOI: 10.1080/00222933.2020.1747653, http://zenodo ...
Burks, Roger A., Heraty, John M.
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Abstract Natural variation can provide important insights into the genetic and environmental factors that shape social behaviour and its evolution. The sweat bee, Lasioglossum baleicum, is a socially flexible bee capable of producing both solitary and eusocial nests.
Kennedy S. Omufwoko+5 more
wiley +1 more source
A bioturbation classification of European marine infaunal invertebrates [PDF]
Bioturbation, the biogenic modification of sediments through particle reworking and burrow ventilation, is a key mediator of many important geochemical processes in marine systems.
Aguzzi+51 more
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Millipeds (Arthropoda: Diplopoda) of the Ark - La - Tex. VI. New Geographic Distributional Records from Select Counties of Arkansas [PDF]
We continue to report, in the sixth of a series of papers, new geographic records for millipeds of the state, including noteworthy records for some taxa collected from Crowley’s Ridge in eastern Arkansas. This contribution documents 47 new co.
Connior, M. B.+3 more
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Ecdysozoan mitogenomics: evidence for a common origin of the legged invertebrates, the Panarthropoda [PDF]
Ecdysozoa is the recently recognized clade of molting animals that comprises the vast majority of extant animal species and the most important invertebrate model organisms—the fruit fly and the nematode worm.
Abascal+77 more
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The milliped genus Euryurus Koch, 1847 (Polydesmida: Euryuridae) west of the Mississippi River; occurrence of E. leachii (Gray, 1832) on Crowley’s Ridge, Arkansas [PDF]
The milliped genus Euryurus Koch, 1847, and the species, E. leachii (Gray, 1832) (Polydesmida: Euryuridae), are recorded from three sites on the northern part of Crowley’s Ridge (Cross, Lee, and Poinsett counties), Arkansas, where the only prior familial
McAllistor, Chris T.+2 more
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