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Origin of Echinodermata
AbstractThe common ancestor of Ambulacraria was a mobile bilaterally symmetrical organism. Its body was subdivided into a preoral (proboscis) region,...
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Coelom Metamerism in Echinodermata
AbstractWithin all major taxa of Bilateria, there are forms with coelomic metamerism. This suggests that coelomic metamerism was characteristic of...
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New record of the feather star Palaeocomatella hiwia (Echinodermata: Crinoidea: Comatulida) from Zhenbei Seamount in South China Sea: new insights into the taxonomic position of Palaeocomatella
One specimen belonging to the family Comatellinae was collected from the Zhenbei Seamount (332.5–478.2 m) in the South China Sea in July 2022. Based...
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First record of Odontaster penicillatus populations (Philippi, 1870) (Echinodermata: Asteroidea) in the Atacama and Antofagasta regions, Chile (Southeast Pacific)
We report for the first time the presence of local populations of the starfish Odontaster penicillatus in the regions of Atacama and Antofagasta,...
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First Specimens of the Cornutan Stylophoran Phyllocystis (Echinodermata) in the Ordovician (Volkhov Regional Stage, Da**ian and Darriwilian) of Baltica and Special Aspects of Stylophoran Axial Symmetry
AbstractTwo new species of cornutan stylophora of the genus Phyllocystis are described from the Volkhov Regional Stage (Middle Ordovician,...
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A relict Triassic brittle star (Echinodermata, Ophiuroidea) in Lower Jurassic strata of Asturias, north-west Spain
Ophiuroids, also known as brittle stars, are an important component of modern marine benthos, yet their fossil record is still poorly understood....
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New Siluro-Devonian Anomalocystitids (Echinodermata, Stylophora) from Bolivia and Canada, and a Reevaluation of Skeletal Homologies in Mitrates
AbstractTwo new mitrate stylophorans are described from the upper part of the Santa Rosa Formation (Lochkovian) in the Central Subandean Zone of...
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An Unusual Cladid (Crinoidea, Echinodermata) from the Pennsylvanian of the Staritsa District (Tver Region)
AbstractThe cladid crinoid Kholokholnyacrinus ilkhovskyi gen. et sp. nov. is described based on a very large cup from the Pennsylvanian (Kashirian...
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Echinodermata from Barra de Mamanguape, Northeast of Brazil, Tropical Southwestern Atlantic
The Mamanguape River estuary represents an important environment for marine species, where there are the combination of soft-bottoms and reefs zones....
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Reproductive cycle of Ophiopholis mirabilis (Echinodermata: Ophiuroidea) in Zhangzi Island area, northern Yellow Sea
Ophiopholis mirabilis is a common species with a high population density on the western coasts of the northern Pacific Ocean. The number of O....
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Transformation of the Ancestral Body Plan and Axial Growth in Echinoderms: Ontogenetic and Paleontological Data
AbstractPaleontological data on the appearance and development of metazoan axial symmetry are compared with molecular genetic evidence to determine...
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Famennian crinoids and blastoids (Echinodermata) from Mongolia
Herein we report on the most abundant and diverse fauna of Palaeozoic crinoids and blastoids collected from Mongolia to date. The fauna is from the...
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The Axial Complex of Echinoderms Represents the Kidney and Is Homologous to the Hemichordate Heart-Kidney
AbstractThe question of the presence of kidneys in echinoderms is a subject of discussion. Many guides state the absence of a special excretory organ...
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A New Hybocrinid Genus (Echinodermata, Crinoidea) from the Middle Ordovician of Ladoga Glint on the Volkhov River
AbstractThe hybocrinid crinoid Trecrinus schmidti gen. et sp. nov. is described from the Middle Ordovician (Uhaku Regional Stage, Darriwilian) of...
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A New Record of Holothuriid Sea Cucumber, Bohadschia atra Massin, Rasolofonirina, Conand and Samyn, 1999 (Echinodermata: Holothuroidea) from India
The present study reports the occurrence of a holothuriid sea cucumber, Bohadschia atra Massin, Rasolofonirina, Conand and Samyn, 1999 from Agatti...
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Origin of the Class Holothuroidea
AbstractAmong the specific characters of holothurians, the main ones are: the structure of the ambulacral (water vascular) system, the presence of...
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Quantitative Evaluation of the Larval Density of Sea Potato Acaudina spp. with Mitochondrial Molecular Marker
The sea potato Acaudina spp. is a species of sea cucumber, belonging to the class Holothuroidea under Phylum Echinodermata . It becomes blooming...
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Benthodytes occidentpalauta sp. nov., a new species of deep-sea holothuroid (Elasipodida: Psychropotidae) from the west of Kyushu-Palau Ridge in the Western Pacific Ocean
Benthodytes occidentpalauta sp. nov. was collected from the Kyushu-Palau Ridge at a depth of 5 481 m in 2021. This new species is characterized by a...
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Benthodytes tetrapapillata sp. nov., a new elasipodid sea cucumber (Elasipodida: Psychropotidae) from a seamount in the Western Pacific Ocean
Benthodytes tetrapapillata sp. nov. was collected from a seamount located on the Caroline Ridge at a depth of 2 289 m, during the cruise of R/V Kexue ...
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An Unusual Body Plan in Bilateria: a Fractal Branching Body
AbstractA branching body pattern with one head and many “tails”, unique for recent Bilateria, was found in three species of endosymbiotic polychaetes...
