Results 11 to 20 of about 75,979 (308)

A new index for quantifying the ornamentational complexity of animals with shells

open access: yesEcology and Evolution, 2022
Morphological complexity reflects the biological structure of an organism and is closely linked to its associated functions and phylogenetics. In animals with shells, ornamentation is an important characteristic of morphological complexity, and it has ...
Luyi Miao   +4 more
doaj   +1 more source

A combinatorial approach to angiosperm pollen morphology [PDF]

open access: yes, 2016
Angiosperms (flowering plants) are strikingly diverse. This is clearly expressed in the morphology of their pollen grains, which are characterized by enormous variety in their shape and patterning.
Blackmore S   +7 more
core   +1 more source

Programming with ornaments

open access: yesJournal of Functional Programming, 2016
AbstractDependently typed programming advocates the use of various indexed versions of the same shape of data, but the formal relationship amongst these structurally similar datatypes usually needs to be established manually and tediously. Ornaments have been proposed as a formal mechanism to manage the relationships between such datatype variants.
Hsiang-Shang Ko, Jeremy Gibbons
openaire   +2 more sources

A new chondrichthyan fauna from the Late Jurassic of the Swiss Jura (Kimmeridgian) dominated by hybodonts, chimaeroids and guitarfishes [PDF]

open access: yes, 2017
The fossil record of chondrichthyans (sharks, rays and chimaeroids) principally consists of isolated teeth, spines and dermal denticles, their cartilaginous skeleton being rarely preserved.
Billon Bruyat, Jean Paul   +3 more
core   +3 more sources

Extraordinary morphological changes in valve morphology during the ontogeny of several species of the Australian ostracod genus Bennelongia (Crustacea, Ostracoda) [PDF]

open access: yes, 2013
Ostracods belonging to the genus Bennelongia differ much in valve morphology between adults and juveniles. Adult valves are asymmetrical, characterised by a beak-like feature in the anteroventral region of the left valve, and, with some notable ...
De Deckker, Patrick, Martens, Koen
core   +3 more sources

Micromorphological study on the seeds of wild species of Pyrus (Rosaceae) in Iran and their taxonomic implication

open access: yesیافته‌های نوین در علوم زیستی, 2022
The seed micromorphological characters of 15 taxa of Iranian Pyrus comprising 22 individuals were examined by Scanning Electron Microscopy (SEM) and Digital Microscopy (DM) for the first time in this survey.
Asghar Zamani
doaj  

Palynological analysis of the genus Dryopteris Adans. (Dryopteridaceae) in Argentina [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2020
The spore morphology and wall ultrastructure of Dryopteris filix-mas, D. patula and D. wallichiana from Argentina were studied using light microscope, scanning and transmission electron microscope.
DANIEL A. GORRER   +2 more
doaj   +1 more source

Taxonomic revision of the genus Lactarius (Russulales, Basidiomycota) in Korea [PDF]

open access: yes, 2019
The genus Lactarius Pers. (Russulales) is a cosmopolitan group of Basidiomycota that forms ectomycorrhizal relationships primarily with both deciduous and coniferous trees.
Eimes, John   +5 more
core   +1 more source

Ornamentation as a tool of social architecture [PDF]

open access: yesArchitecture Papers of the Faculty of Architecture and Design STU
Given the complex challenges of social architecture, this article examines ornamentation as a deliberate architectural tool that can strengthen integration processes, shape architectural identity, and foster the long-term success of social institutions ...
Csenge Faur
doaj   +1 more source

Suboptimal Embryonic Incubation Temperature Has Long-Term, Sex-Specific Consequences on Beak Coloration and the Behavioral Stress Response in Zebra Finches

open access: yesFrontiers in Ecology and Evolution, 2022
Secondary sex characteristics, like beak color in some avian species, have indirect impacts on reproductive success, as they are considered to be honest indicators of condition, immunocompetence, and developmental history.
Madeline P. Choi   +2 more
doaj   +1 more source

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