Zobrazeno 1 - 10 of 242 pro vyhledávání: '"Ambulacral"'
1
Redescripción del erizo de mar Eucidaris thyarsii (Cidaroida: Cidaridae) basado en material del Pacífico mexicano
Autor: Mariana-P. Ruiz-Nava, Francisco-A. Solís-Marín, Carlos-A. Conejeros-Vargas
Publikováno v: Revista de Biología Tropical, Volume: 69 Supplement 1, Pages: 438-451, Published: MAR 2021
Revista de Biología Tropical; Vol. 69 No. S1 (2021): Volume 69 – Supplement 1 – March 2021: Research on Echinoderms in Latin America V; S438-S451
Revista de Biología Tropical; Vol. 69 Núm. S1 (2021): Volumen 69 – Suplemento 1 – Marzo 2021: Estudios latinoamericanos en equinodermos V; S438-S451
Revista Biología Tropical; Vol. 69 N.º S1 (2021): Volumen 69 – Suplemento 1 – Marzo 2021: Estudios latinoamericanos en equinodermos V; S438-S451
Portal de Revistas UCR
Universidad de Costa Rica
instacron:UCR
Introduction: Eucidaris thouarsii is a cidaroid sea urchin found from the Gulf of California to Ecuador. Its taxonomy is based on general descriptions of test shape, primary and secondary spines, the Aristotle’s lantern, apical system, and peristom
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ea88f165cc5ed9d6a41b043ffbc5499
https://doi.org/10.15517/rbt.v69isuppl.1.46383
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2
The first record of floor plates in pinnules and the earliest record of an anitaxis in rhodocrinitid diplobathrid camerate crinoids
Autor: Thomas E. Guensburg
Publikováno v: Journal of Paleontology. 95:800-804
Restudy of Proexenocrinus inyoensis Strimple and McGinnis, 1972, shows that this earliest-known rhodocrinitid diplobathrid camerate crinoid (late Floian, Early Ordovician) expresses the only known record of ambulacral floor plates within pinnules. Th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1fe0e058073afef5c62fa372ead24f59
https://doi.org/10.1017/jpa.2021.1
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3
Origin and significance of Lovén's Law in echinoderms
Autor: Christopher R. C. Paul, Frederick H. C. Hotchkiss
Publikováno v: Journal of Paleontology. 94:1089-1102
Lovén's Law described the position of larger basicoronal ambulacral plates in echinoids. The smaller basicoronal plates form first in ontogeny. We restate Lovén's Law to describe the position of first ambulacral plates using Carpenter's ambulacra a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::236b241a8cd3b6ed7b83dc95f76084cb
https://doi.org/10.1017/jpa.2020.31
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4
Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea)
Autor: Mariano Ignacio Martinez, Pablo E. Penchazadeh, Renata Micaela Pertossi
Publikováno v: Marine Biodiversity. 51
Isometra vivipara and Phrixometra nutrix are two brooding feather stars (order Comatulida) that are widely distributed along the southern tip of South America to the Antarctic. We examined 210 specimens of I. vivipara and 38 specimens of P. nutrix co
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2332e52a3e1083e15eb1eb11019c2de7
https://doi.org/10.1007/s12526-021-01194-9
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5
An Early Ordovician (Floian) asterozoan (Echinodermata) of problematic class-level affinities
Autor: Forest J. Gahn, Thomas E. Guensburg, Daniel B. Blake
Publikováno v: Journal of Paleontology. 94:358-365
Falloaster anquiroisitusnew genus new species (Asterozoa, Echinodermata) is described from the Floian (Early Ordovician) Garden City Formation of Idaho. The new taxon is known from a single small specimen. Because of weathering, remaining disk elemen
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::27d0ba2c0983a1e8647d4a42531006d2
https://doi.org/10.1017/jpa.2019.82
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6
A geometric morphometric analysis of Arachnoides placenta (Echinoidea: Clypeasteroida): An examination of ontogenetic development and morphological variation
Autor: Robert E. Swisher, Jih-Pai Lin
Publikováno v: Zoosymposia. 15:159-171
Irregular echinoids, particularly clypeasteroids or “sand dollars”, have obtained highly adaptive morphologies suited to their life habitats. Specimens (n = 26) of a clypeasteroid echinoid Arachnoides placenta were examined to understand how thes
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::955f69e0a43e66ef179262c244f4bf58
https://doi.org/10.11646/zoosymposia.15.1.18
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7
Notes on Mississippian echinoderms from Hurdlow, Derbyshire, central England
Autor: Stephen K. Donovan, A.J. (Ton) de Winter
Publikováno v: Proceedings of the Geologists' Association. 130:582-589
The fossil echinoderms of the Lower Carboniferous (Mississippian) of Derbyshire remain understudied, principally due to the nature of the preservation rather than any lack of biodiversity. Echinoids and crinoids are described in float blocks of limes
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::567f20d9691f04d082f34f269cbf639b
https://doi.org/10.1016/j.pgeola.2018.10.001
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8
New rhenopyrgid edrioasteroids (Echinodermata) and their implications for taxonomy, functional morphology, and paleoecology
Autor: Timothy A. M. Ewin, Samuel Zamora, Phillip Isotalo, Markus Martin
Publikováno v: Zaguán: Repositorio Digital de la Universidad de Zaragoza
Universidad de Zaragoza
Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname
Rhenopyrgids are rare, turreted edrioasterid edrioasteroids from the lower Paleozoic with a distinctive and apparently conservative morphology. However, new, well-preserved rhenopyrgid edrioasteroid material from Canada, along with a review of descri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09205d3cfcf71ff46b7546efe86cf976
https://doi.org/10.1017/jpa.2019.65
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9
Fusion or hypertrophy?: the unusual arms of the Petalocrinidae (Ordovician-Devonian: Crinoidea)
Autor: Yue Li, Yingyan Mao, William I. Ausich
Publikováno v: Journal of Paleontology. 93:966-970
Using polarized light microscopy, the large, triangular or cylindrical second brachial plate of the Petalocrinidae is demonstrated to be a compound brachial formed through fusion of brachial plates along the distal margin of the growing arms. Based o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3acc6bf8229b39d95992b0925f7649dd
https://doi.org/10.1017/jpa.2019.25
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10
‘Aristocystites? subcylindricus var. de bohemicus Barrande, 1887’ is a valid species of Aristocystites (Echinodermata, Diploporita): description and taxonomic consequences
Autor: Ronald L. Parsley, Christopher R. C. Paul
Publikováno v: Journal of Paleontology. 93:822-826
Barrande erected the genus Aristocystites, type A. bohemicus Barrande, in 1887. He listed other questionable species, including “A.? subcylindricus var. de bohemicus.” Aristocystites subcylindricus has not been accepted apart from Bather who in 1
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fa07ae53288b3da708540160fca2a606
https://doi.org/10.1017/jpa.2019.5
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