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Science, engineering, and mathematics — biology, chemistry, physics, astronomy, earth sciences, social sciences, and technology research. A curated gateway to academic and professional scientific resources.
57129 resources
Graptolites collected from the Athens Shale formation (Ordovician age) near Montevalo, Alabama.
A free graptolite researcher and a Rosicrucian Frater. Research interests, primarily in sessile graptolites and pterobranchs, and publications.
First find of a Permian rhabdopleurid (Graptolithoidea).
Links to graptolite and pterobranch pages, abstracts, articles, graptolite researchers.
Information about the species; photo.
Photo of the graptolite species.
Stolonoid graptolites discussed as rhabdopleurids.
Definition and nature of the Graptovermida, graptolites incertae sedis.
Affinities of some alleged graptolite genera.
Nature of the genera assigned to the graptolite order Inocaulida.
A graptolite-like fossil from the Ordovician of Estonia and erratic boulders.
Material from the Bendigonian Series, Bendigo, Victoria, Australia.
Diagnosis, occurrence, images, and references of the species.
List of extinct and extant families, genera and species.
Graptolite-like fossils from the Upper Ordovician of Ohio and Indiana. By J.M. St.John and M.A. Wilson.
Diagnosis, distribution and images of the genus.
The only fossil species of the genus Cephalodiscus.
Biography of an Authority on Graptolites.
Description and SEM micrographs of normal and sealed thecal morphs in the camaroid graptolite Xenotheka klinostoma from the Ordovician of Öland, Sweden.
Early Palaeozoic tracheid-like tubes, believed to be of vascular land plant origin, resemble fragments of graptolite stolons.
Isolated stolons of Koremagraptus-like graptolites were misinterpreted as remains of the 'chitinous' hydroids (4 images).
Images (SEM and LM) of the fundamental unit of cortex in graptolites.
Three coenecia (two very young) from Stock Point, Plymouth.
Results of the amino-acid analysis of the skeleton of Rhabdopleura and Cephalodiscus.
An excellently preserved zooidal tube of a Silurian hemichordate closely related to the extant genus Rhabdopleura.
Relationshipis among graptolite orders.
Back-scattered electron microscopy technique applied to study graptolitic material - BSEM image of Psigraptus.
Description of a new technique for studying chemically isolated graptolites.
Radiographs of Rhaphidograptus toernquisti, Monograptus atavus and Pseudoclimacograptus undulatus with explanations of the salient features.
A comprehensive list of extant hemichordate species with images of a few.
Photograph of several specimens of Monograptus colonus, one being magnified, from Silurian deposits at Ludlow, UK.
An enigmatic organic-walled fossil twisted around stipes of the sessile graptolite Mastigograptus (Middle Ordovician).