Results 11 to 20 of about 1,885 (176)

Global diversity of brittle stars (Echinodermata: Ophiuroidea). [PDF]

PLoS ONE, 2012
This review presents a comprehensive overview of the current status regarding the global diversity of the echinoderm class Ophiuroidea, focussing on taxonomy and distribution patterns, with brief introduction to their anatomy, biology, phylogeny, and ...
Sabine Stöhr, Timothy D O'Hara, Ben Thuy   +2 more
doaj   +7 more sources

The complete mitochondrial genome of Asteroschema tubiferum (Ophiuroidea: Euryalida: Asteroschematidae) [PDF]

Mitochondrial DNA. Part B. Resources, 2022
We describe the first mitochondrial genome of a brittle star Asteroschema tubiferum Matsumoto 1911 in family Asteroschematidae. The mitogenome was sequenced and assembled using next-generation sequencing technology, and were 16,361 bp in size with 37 ...
Zhaoshan Zhong, Minxiao Wang, Haining Wang, Chaolun Li   +3 more
doaj   +2 more sources

Ophiuroidea das regiões antartica e subantartica: 2. variação em Gorgonocephalus chílensis (Philippi) (Echinodermata, Ophiuroidea, Gorgonocephalidae) Ophiuroidea from antarctic and subantarctic regions: 2. variation on Gorgonocephalus chilensis (Philippi) (Echinodermata, Ophiuroidea, Gorgonocephalidae)

Brazilian Journal of Oceanography, 1983
Foram examinados 198 exemplares de Gorgonocephalus chilensis das regiões antártica e subantartica, tendo-se em vista a variação de caracteres morfológicos externos.
Ana Maria Gouveia Monteiro, Luiz Roberto Tommasi   +1 more
doaj   +2 more sources

New Brittle Stars (Echinodermata, Ophiuroidea) from the Oligocene of the Mainz Basin, Germany

Taxonomy, 2022
The fossil record of the Ophiuroidea is still patchy, especially in the Cenozoic. Only four species have been described from the entire Oligocene, which is in stark contrast to the present-day diversity counting more than 2000 species.
Lea Numberger-Thuy, Ben Thuy
exaly   +3 more sources

Morphological Characterization and Complete Mitochondrial Genome of a New Epizoic Hexamerous Brittle Star <i>Gymnolophus sexradia</i> sp. Nov. [PDF]

Ecol Evol
This study describes a new hexamerous epizoic brittle star species, Gymnolophus sexradia sp. nov., from the South China Sea, which lives on crinoid hosts and exhibits a six‐armed body plan possibly indicating fissiparity. Its vertebral and arm plate structures enhance horizontal flexibility for grasping the host, and phylogenetic analysis based on ...
Zhang Z, Xiao W, Zhang C, Li C, Zhang H, Chen Z.   +5 more
europepmc   +2 more sources

First Jurassic brittlestar from Neuquén Basin, Argentina [PDF]

Acta Palaeontologica Polonica, 2023
Articulated fossil ophiuroids from South America were reported for the Devonian, Cretaceous, Eocene, and Miocene. Here we report the first Jurassic record of an articulated ophiuroid from the Sierra Chacaicó Formation (early Pliensbachian– Sinemurian ...
DÉBORA M. CAMPETELLA, EVANGELINA E. PALÓPOLO, MAXIMILIANO N. RODRÍGUEZ, BEN THUY, JUAN J. PONCE, NOELIA B. CARMONA, SILVIO CASADÍO   +6 more
doaj   +1 more source

Contrasting cryptofaunal responses to seabird nutrient inputs illuminate coral reef productivity pathways. [PDF]

Ecology
Abstract Nutrients moving across ecosystems can propagate through food webs via distinct trophic pathways. Their integration into food webs is often mediated by small, abundant taxa that channel subsidies from primary producers to higher trophic levels.
Jeannot LL, Dunn RE, Velos MJP, Williams GJ, Benkwitt CE, Graham NAJ, Brandl SJ.   +6 more
europepmc   +2 more sources

An investigation into the diet of elephant fish (Callorhinchus milii) in the waters of Aotearoa/New Zealand. [PDF]

J Fish Biol
Abstract Chondrichthyans (sharks, rays and chimaeras) are increasingly understood to be an important part of ocean ecosystems, but their ecological role is unclear. Callorhinchus milii (elephant fish) is a chimaera species endemic to Aotearoa/New Zealand and southern Australian waters.
Cooper KUC, Rowden AA, Stevens D, Finucci B.   +3 more
europepmc   +2 more sources

Unravelling Hidden Trophic Interactions Among Sea Urchin Juveniles and Macroinvertebrates by DNA Amplification. [PDF]

Mol Ecol
ABSTRACT Rocky reefs may shift between two distinct stable states: productive algal forests, characterised by high abundance and biodiversity of macrofauna, and impoverished barrens, dominated by overgrazing sea urchins. Barren states may persist despite the recovery of adult sea urchin predators, suggesting additional stabilising mechanisms.
Sutera A, Bonaviri C, Trapani FD, Bella F, Macic V, Marković O, Hereu B, Michele R.   +7 more
europepmc   +2 more sources

Determinación de la asociación de las especies (Ophiocomina nigra y Arbacia lixula), del Phylum Echinodermata, en función de variables físico-químicas en estratos rocosos del Refugio de Vida Silvestre, Rio Escalante-Chacocente

La Calera, 2022
El presente estudio se realizó en la zona intermareal en el Refugio de Vida Silvestre- Río Escalante Chacocente, municipio de Santa Teresa. Su objetivo principal es la determinación de la asociación de las especies Arbacia lixula y Ophiocomina nigra en ...
Luz Esmelda Reynoza Ruiz, Heraldo Salgado Arauz, Karol López Aburto   +2 more
doaj   +1 more source